Why do young onions in the garden turn yellow and not grow: reasons, what to do, what to treat, water, feed? Why the onion shoots and quickly turns yellow: causes, treatment. What does an onion lack if it turns yellow?

If the onion turns yellow, it means there was an oversight in care. We will learn how to identify and prevent the proliferation of pests in onions in the article.

Onions are perhaps one of the most popular food items; they are added to many dishes, sometimes even to desserts. One can talk endlessly about the beneficial qualities of this vegetable, and, of course, many grow green vegetables in their beds, in greenhouses, and even on windows in special containers. One of the most common problems that arise when growing onions is the yellowness of the onion feathers. This is exactly what the article will discuss.

Why young onions turn yellow in the garden or in a greenhouse and do not grow: diseases

It is better to throw out affected onions immediately, especially if you grow the plant in a greenhouse, because the disease can spread to other bulbs. But it will no longer be possible to cure a dried plant. To prevent the appearance of yellowness, you need to take into account some factors that can cause the plant to dry out:

Pest beetles that can carry diseases
The presence of fungal diseases of the plant
Regularity of care, hilling and getting rid of weeds
The activity of sunlight also affects the growth and development of vegetables.
Lack of nitrogen in the soil

Yellowing of onions
If these aspects are controlled, the harvest will be safe and sound, and the onions will be green. It is also worth remembering that if you properly care for onions and prevent yellowing of the plant in time, then all the beneficial substances will be fully preserved.

How to understand that onions are affected by diseases and pests in June

Onions are very susceptible to various diseases caused by fungi and viruses. Fungal spores are found in the soil, plant waste and the bulbs themselves. Viruses are carried by various insects.

Rust

First, yellow raised spots appear on the feathers, and then the plant dies.

Bacterial rot and bottom rot

A characteristic sign of the disease is a soft onion. The onion feathers also turn yellow and die.

IMPORTANT! All affected plants are pulled out and burned. To prevent the disease, planting material is soaked in the drug Fundazol.

Onion fly

First of all, the bulb is damaged - it rots and becomes too soft. Insects lay their larvae inside the onion feathers, which causes the crop to turn yellow and dry out.

Experienced gardeners advise planting onions in open ground in April - before flies appear. Additionally, having a carrot bed nearby can repel pests. If the problem appears in June, use the chemical Iskra.

The packaging of the drug may differ from that shown*

Stem nematode

Small white worms that suck the sap from plants for food. To prevent their occurrence, the bulbs are always treated with preparations before planting. Another preventive remedy is marigolds. These flowers are planted between rows, or an infusion is made from them.

Tobacco thrips

When yellowing dots and spots appear on the feathers of onions in June, this means that pests have settled in the garden bed. Pre-planting treatment of turnips and digging up the soil in the autumn will save you from small insects.

Root mites

Mite larvae are dangerous because they eat all plant tissues. As a result, the leaves turn yellow and the bulbs turn into a loose mass. For prevention, the beds are regularly hilled, and all weeds are removed.

What does the onion lack if the feather turns yellow: lack of nutrients and microelements in the soil

One of the reasons for onion feathers drying out is a lack of minerals and nutrients in the soil where onions are grown. If you fulfill all the requirements for caring for the plant, water it on time, and the weather allows you to grow a good harvest, but the onions still turn yellow, then most likely the problem is in the soil.

It is recommended to check the soil for nitrogen content. This can be done in the laboratory, or using a special device yourself.
Of course, it is very easy to solve this problem. If there is not enough nitrogen in the soil, then it is worth fertilizing the area with nitrogen-containing fertilizer. Chicken manure or mullein will also work.
Nitrogen deficiency is a fairly common problem that affects not only onions, but also other plants.

It is important to remember that you only need to feed the beds with rotted manure or fermented infusion. Because When adding fresh manure to the soil, you can introduce a fungal disease, which is extremely destructive for onions.

Improper watering

The most common problem is insufficient watering; due to lack of water, the feathers turn yellow. At the initial stage of the growing season, the plant needs a lot of water, since it is this that affects the growth activity of feathers, and fluid accumulation occurs. In hot weather without rain, the plant does not receive enough moisture, due to which its above-ground part loses its elasticity and becomes yellow. The need for watering is easy to check - if the soil is dry at a depth of 5 cm, then the plant is experiencing a lack of moisture.

The frequency of watering is determined not by the type of seed, but by weather conditions. If June turns out to be dry, at the beginning of the month it is required at least 2 times a week, up to 15 liters. water per square meter. By mid-June, watering can be reduced, and it can be stopped completely only 14 days before ripening, so as not to spoil the taste of the onion and ensure good storage.

Why young onions turn yellow in the garden or in a greenhouse and do not grow: pests

Various pest beetles, including onions, cause significant damage to vegetables.

Onion fly, or rather its larvae. Approximately in the second half of May, the female fly lays her eggs under the first scales of the onion, and a week later, the larvae grow up and begin to feed on the onion, as a result the plant rots. To prevent onion fly damage to a plant, you need to follow some rules:

Plant onions as early as possible, so the plant will be stronger and more resistant to conditions
You need to plant onions near carrots, because... the fly hates her smell
You can use one bed for onions only once every 4 years
Treat the beds with special means; one of the traditional methods is saline solution.

The onion secretive proboscis feeds on leaves, and you can get rid of it using the following methods:

After harvesting, very carefully clean the beds of onion residues, because the beetle can overwinter in such places
Before the onset of frost, you need to loosen the ground; the beetle does not tolerate cold
If there are few beetles, you can simply collect them
Between the rows you need to loosen the soil and add repellents, such as wood ash, mustard powder or ground pepper.

Pests can also cause yellowing

Stem nematode is an almost invisible worm that feeds on plant sap. It is very difficult to combat such pests, because... It is almost impossible to determine the presence of a nematode in the soil, but methods still exist:

Do not plant onions in the same place for more than 4 years
Use whole, undamaged planting material
Treat onions before planting
Water the onions with marigold tincture

Tobacco thrips is a small insect, no more than 1 mm in size, that feeds on the juice of many plants, including onions. To avoid damage to onions by thrips:

Crop rotation
Pre-planting material treatments
Spraying the beds with a special product

The onion moth appears in July and is especially harmful to the plant in dry, hot weather; the pest can be controlled using the following methods:

Crop rotation
Careful removal of residues after harvest
Digging the soil before the onset of cold weather

Onion diseases causing yellowing of feathers

Fusarium (bottom rot)

The first symptom of fusarium will be yellowed and dried onion tips.
If you dig up the bulb, you will find white fungal spores near the roots. The bulb itself will be watery and soft. What should we do if our onions turn yellow due to fusarium? Pull out and burn diseased plants, and water the bed with iodine-soda solution. For 10 liters of water, take 10 milliliters of iodine, 500 grams of soda and 10 grams of potassium permanganate. Then the resulting solution is diluted with water in a ratio of 1:10 and you can water the onion beds.

The following preventive measures will help prevent fusarium in the future:

Loosening the soil. Fungi do not like loose soils, but onion roots, on the contrary, prefer intense air exchange.
Treatment of onion sets with a fungicide. You can use Fundazol, Fitosporin, Thanos or Maxim.
Pre-sowing treatment of the bed with one of the antifungal drugs. Biofungicides, for example: Alirin-B, Gamair or Fitosporin, disinfect the soil well.

Bacterial rot

Bacterial rot of onions manifests itself through yellowing and wilting of the feathers.
At the same time, the bulb itself rots, and the “arrows” of onions grown for seeds dry up. This disease is brought to us by already familiar pests: onion flies, thrips and others. There are no specific measures to combat bacterial rot. It is enough to keep insect pests away from the beds, not to water the onions in the second half of summer, and to treat the seed against fungi.

Onion rust

When yellow spots with bulges appear on onions in late spring or early summer, we are dealing with rust.
The feathers affected by it not only turn yellow, but gradually turn black and die. This disease usually occurs in cool, damp weather. Fighting rust is useless. If this disaster occurs, everything must be done to prevent its occurrence in the next season. First, destroy all infected plants and plant debris. Secondly, plan pre-sowing warming of the bulbs and soaking them in fungicide. Thirdly, observe crop rotation, do not plant onions in the same area. Fourthly, in June, treat the bed with a copper-containing preparation. Finally, avoid overcrowding and loosen the soil regularly.

Downy mildew (downy mildew)

Another disease caused by a fungus includes yellowing of onion feathers in the list of symptoms.
Moreover, with peronosporosis, the feather first turns pale, then turns yellow and becomes bent. In dry weather, the leaf becomes covered with light green spots, and with high humidity, a gray-violet coating forms. Fungi are always difficult to get rid of. Once again, prevention comes to the fore. The actions are still the same: warming up the seedlings, disinfecting the soil with bio-fungicides, planting onions after a good predecessor, pollinating the plantings with ash.

Of the chemical preparations against downy mildew, Bordeaux mixture saves. Treatment with a 1% solution of this drug is required.

There are also folk recipes for fighting fungal infections. For example, a fermented infusion of herbs. Half a bucket of chopped grass (any kind, even weeds) is filled with hot water to the top. Leave for several days and then use for spraying. By the way, treatment with whey from the fermentation of milk, kefir or yogurt (1:10) also helps very well.

Why onions turn yellow in the garden or in the greenhouse and do not grow: improper care

Proper care is an important stage in growing any plant. In order for the onion harvest to be successful, you should adhere to the following rules:

When the onion is just beginning to develop, you need to water the plant generously once every 3 days. You can mulch the soil and then water less often
Water only with warm water 18-25°C
Water only before noon
Water for irrigation should be as soft as possible, without the presence of heavy metals in the composition
Watering should be carried out scatteredly, preferably with a watering can

Watering onions

You need to combine watering with mineral fertilizing
Stop watering 1 month before harvest

Also, do not forget about timely fertilization of the soil and clearing of weeds.

Pest Control

To exterminate insects, folk remedies (decoctions and infusions of herbs), as well as insecticides, are used.

What to use from folk remedies:

against onion flies (and other pests) help by watering with infusion of tobacco, garlic, dusting with mustard powder, ash, saline solution;
the secretive proboscis cannot tolerate ash infusion or the smell of ammonia.

How to spray onions against onion flies so they don’t turn yellow: remedies, recipes

The larvae that the onion fly lays are destructive to the plant; in order to prevent the destruction of the crop, measures must be taken in time. If the fly has already caused damage, you need to treat the beds with special means - insecticides. There are other methods that allow you to fight the pest, for example:

Ammonia not only destroys the larvae, but also fertilizes the soil. But you should adhere to the correct proportions so as not to harm the plant: 2-3 tbsp. for 10 liters of warm water
Saline solution. Proportions: 1/3 of a pack per 10 liters. The first watering is carried out when the plant has grown 5 cm. The second treatment is carried out after 2 weeks, you will need half a pack of 10 liters. And the third watering should be done after 3 weeks and for this you will need 2 packs of salt per 10 liters.

Onion pest
Wood ash is an excellent means of combating various pests and fertilizer. For 10 sq.m. distribute 2-3 kg of ash evenly. Then lightly loosen the area
Treatment with laundry soap is carried out 2 times in 1 season. To do this, dissolve 50 g of soap in 10 liters of purified, warm water. It is better to carry out the procedure in the evening so that the soil retains moisture.
An infusion of strong-smelling herbs is also a proven way to combat onion flies. Herbs such as mint, wormwood, lemon balm, and valerian are better suited for this. Proportions: brew 200 g of crushed dry herbs in 10 liters of boiling water, let it brew for 4 hours.

Pest infestation

Pests pose a great danger. Even minor damage to the bulb leads to the development of diseases, yellowing or rotting of the vegetable. Harmful insects not only damage crops, but also cause food allergies in humans.

Onion mite

Pest of the class of arachnids, family of flour mites. A very tenacious insect. The onion mite can go without food for a long time or feed on decaying plant debris. At low or high temperatures it enters a state of suspended animation. The powerful sucking mouthparts of the mite suck out moisture from the onion scales.

Signs of the disease:

stem deformation;
the appearance of light spots on the leaves;
at the moment of “occupation” of plantings by females, the plants are covered with a “bloom” - mite bodies;
the bulb becomes dehydrated and shriveled;
Plants are often affected by rot and mold.

Causes:

failure to carry out measures to process planting material;
ignoring sanitary treatment of storage facilities;
accumulation of plant residues in the garden;
failure to comply with disembarkation deadlines;
violation of agrotechnical measures for tillage.

Prevention measures:

creating a grass barrier;
treatment with herbal decoctions of nettle;
autumn digging of the soil;
disinfection of storage premises;
warming up the planting material for one week;
treatment of seed material with colloidal sulfur before planting.

The fight against onion mite with folk remedies and general insecticides does not bring tangible results. When using unidirectional drugs, ticks develop immunity.

Onion secretive proboscis (weevil)

The onion secretive proboscis is a black beetle 2-2.5 mm long. With its elongated proboscis nose it sucks juice from the plant. The larvae gnaw out the onion from the inside.

Signs of the disease:

the plant becomes covered with silvery spots and dies;
At high humidity, an olive-colored coating is observed.

Causes:

non-compliance with agrotechnical measures to care for crops;
failure to provide sanitary conditions in the garden (accumulation of vegetation residues).

Prevention measures:

planting onions in well-ventilated beds;
loosening and weeding of beds;
watering the rows with water with the addition of ground hot pepper, wood ash, dry mustard;
treating the soil with a mixture of wood ash, red pepper or dry mustard (2:1);
treatment of plantings with Karbofos (60 g per 10 liters of water);
plant onions between the beds as bait (as the bait becomes infected, the bait is cut off and removed from the bed);
cleaning the remaining vegetation from the beds in the fall.

Fighting methods:

during the growing season, treat with Karbofos solution (60 g per 10 liters of water). A liter of solution is enough for 10 square meters. m landings.
In the evening, lay out strips of burlap (10 cm wide) and wrap them around the bulbs. In the morning, remove the tapes in which the pest gets entangled.

Onion thrips

Onion thrips (Thrips tabaci) is a small insect 0.8 mm long, brown in color, and has fringed wings. The larvae are greenish in color and have no wings. Thrips and their larvae feed on onion juice.

They overwinter in the upper layers of soil or plant debris. In early spring, females lay eggs. The larva has a feeding schedule similar to that of an adult. The peak activity of thrips is dry, hot weather.

Signs of the disease:

there are whitish and silvery spots on the leaves;
leaves become distorted, turn yellow and wither.

Causes:

non-compliance with crop rotation;
violation of agrotechnical measures;
violation of sanitary measures for preparing seed material for planting.

Prevention measures:

compliance with agrotechnical measures;
thermal disinfection of planting material (exposure in water 40-45°C for 10 hours);
soaking planting material in a solution of sodium nitrate for 24 hours;
drying the onions before storing them at a temperature of 35-37 degrees for a week;
cleaning up plant residues from the garden;
laying traps between plants;
planting marigolds around onion beds;
treating the beds with infusion of celandine (infuse cut stems of celandine in water for 48 hours).

Fighting methods:

lay out cardboard strips painted blue and coated with pest glue;
treat the plantings with an infusion of onions and garlic (1 tbsp. chopped onion or garlic per 1 glass of water);
Infuse tobacco leaves in a small amount of water, leave the strained infusion for another 3 days, dilute in water 1:2 and treat the plantings.

Onion fly

The insect is gray in color and looks like an ordinary fly. Lays eggs at the end of May in the upper scales of the bulb, plant or in the soil. The larvae feed on the fleshy scales of onions. Over the summer, three offspring of the fly grow, and the bulb rots. And the larvae are the most dangerous threat.

Onion fly larvae live not only in onions, but also in garlic and flower bulbs.

Signs of the disease:

the bulb rots;
leaves turn yellow and die;
A putrid smell appears in the beds.

Causes:

non-compliance with crop rotation;
violation of agrotechnical measures in the form of autumn digging;
infected planting material;
neglect of disinfection of planting material.

Prevention measures:

planting onions next to carrot beds (the specific smell of carrots repels the onion fly);
soaking seeds before planting in saline solution;
watering with a solution of table salt;
regular loosening of the soil;
pollination with tobacco infusion (400 g/10 l of water, leave for 48 hours, boil for 2 hours, strain and add another 10 l of water, add 100 ml of liquid soap and process 3-4 times during the growing season);
destruction of plant residues;
late digging of the soil;
Liming the soil after digging and before planting.

Fighting methods:

spraying plantings with infusions with a strong odor: mint, pine needles, valerian, tomato leaves, wormwood, lemon balm;
sprinkle the plantings with ash or tobacco dust, preferably after rain;
water the onion beds with saline solution in 3 doses: the first watering - when the plant reaches 5 cm, the second - after 2 weeks, the third - 3 weeks after the second treatment.

Onion and stem nematode

Nematodes are a family of parasitic roundworms that lay eggs in bulbs. The developing offspring feed on the sap of the bulb, which causes the death of the plant.

Signs of the disease:

swollen and falsely twisted stem;
in cross-section the bulb is loose, the structure of the fleshy scales is granular;
uneven thickening of scales;
the scales turn white and then become brownish or gray;
The bulbs are moist and have a garlicky smell.

Causes:

use of nematode-infected planting material;
nematode-infested soil;
use of contaminated equipment (hoes, plows, harrows);
contaminated remains of previous crops, weeds.

Prevention measures:

compliance with crop rotation, returning crops affected by the nematode to the same place no earlier than after 3 years;
soil treatment with Carbation solution (200 ml per 1 sq. m);
selection of healthy, nematode-free seeds for planting;
heat treat the seed material by immersing the bulbs in water at a temperature of up to 50°C for 8-10 minutes;
watering for 2 weeks with a light pink solution of potassium permanganate;
timely weeding of crops from weeds;
adding dolomite flour to the soil to deoxidize it;
To make the soil loose, add peat and sand;
during the growing season 2-3 treatments with Abamectin.

Ways to fight:

Folk remedies in the fight against nematodes are limited to heat treatments of planting material and crops.
Treatment with chemicals is effective:
Chloropicrin;
Nemagon;
Methyl bromide, etc.

How to water onions to prevent worms from turning yellow: remedies, recipes

If there are worms in the onion bed, it is quite problematic to fight them, because they are almost invisible, but the pests cause significant damage to the green onions. You can fight them in the following ways:

Saline solution: 1 glass of table salt per 10 liters of water, this will even help fight weeds and other pests
It is important to treat the soil with boiling water before planting - this will destroy pests.
Before planting, you can water it with a solution of potassium permanganate.
Wood ash: Sprinkle it over the area before planting onions.
Another great method is to take 3 kg of tomato tops, pour 10 liters of water, boil, add 50 g of laundry soap, cool slightly and treat the area.

Saving onions from worms
The most important thing to combat pests is as soon as the first damaged leaves appear, this way damage to other plants can be avoided.

Fungal diseases and control methods

Yellow onion feathers may indicate another fungal disease - bottom rot. You can detect it by pulling out one plant and examining its root. During the development stage of the disease, a light white coating forms on it, and if the fungus is rampant in the area, the bulbs are softened and covered with gray rot. The reason is thickened plantings, flooding or any waterlogging of the soil. If such a phenomenon has already occurred on the site, in the following years the onions should be planted as far as possible from this zone. Do not use seed from an infected crop, but before replanting, treat the seed in a weak solution of potassium permanganate or alcohol. Water the bed moderately, arrange drainage or drainage of excess rainwater.

How to fertilize onions if they turn yellow: remedies, recipes

Onion feathers turn yellow for various reasons, one of them is a lack of nutrients in the soil, for this you need to periodically fertilize the soil and adhere to the rules of crop rotation. It is better to take action and prevent the occurrence of a problem that leads to the drying out of the plant, rather than continue to deal with the consequences. Therefore, you need to disinfect the soil in time; for this you will need:

Bucket of warm water
1 tbsp. copper sulfate granules

This solution can be used to treat the soil before sowing, but only high-quality planting material should be used.

Pests can be repelled from the aroma of onions in this way:

Grated laundry soap – 1 tbsp.
Tobacco dust – 250 g
Warm water – 3 l

Leave the mixture for 2 days, then dilute the resulting tincture in 10 liters of water and pour over the vegetables.

Improper care

The most common mistake that leads to yellowing of onions concerns watering. For different species, the watering regime is slightly different, but there are general recommendations for all:

At the beginning of growth and rooting, onions require abundant watering at least once every three days. If the beds are mulched, the frequency can be reduced - moisture is retained longer.
Watering itself should be carried out directly under the root, using warm water ranging from +18 to 25ºС. Hard water is softened with special additives or by boiling or standing in the sun.
This procedure is best done in the morning until noon.

In green and onion sets, the tips of the feathers often turn yellow and dry out due to lack of moisture. This is especially true during the period of active growth of green mass. In this case, it is necessary to carry out abundant watering; you can use drip watering, leaving it overnight.

At the end of July and beginning of August, the onions ripen and turn yellow for natural reasons. Therefore, during this period, watering should first be limited and then stopped altogether.

What fertilizers to feed onions so as not to turn yellow: list, recipe for use

An important stage in growing onions, in addition to watering and proper care, is timely feeding of the plant. To obtain a lush and rich harvest, the soil must be rich in minerals and useful trace elements; over time, the soil loses its useful substances, which is why you need to use different types of fertilizer and adhere to the rules of crop rotation.

Onions love loose soil and need phosphorus, nitrogen and potassium fertilizing. You can use both organic and mineral elements, because onions are unpretentious. And you need to prepare the soil for the next planting in the fall, after the harvest has been harvested.

In the first two weeks, nitrogen is very important for onions, so the first feeding should take place during this period. To enrich the soil with nitrogen, urea or ammonium nitrate is suitable. Approximately 30 g of fertilizer is needed per 1 m². After another week, you can fertilize with phosphorus and potassium:

30 g superphosphate
10 g potassium chloride
10 liters of purified water

Also, a tincture of wood ash is excellent: 2 cups of ash per bucket of water. You need to be careful with mineral fertilizers, because an excess of inorganic substances can accumulate in onions. It is also better to use both organic and inorganic substances and fertilizers, this way the onions will be rich in nutrients.

It is important to feed onions

Fertilizing onions with organic substances:

First feeding – 10 liters 1 glass of manure
Second - for 10 liters of water 2 liters of herbal infusion
Third - leave 300 g of wood ash in 10 liters of boiling water for 3 days

How to water the onion so that the onion is large?

You can help onions grow large by choosing the right watering agent.

Mineral products

This is a whole group of fertilizers. Due to the concentration of the active substance, it is much more effective than traditional recipes.

You can water according to this scheme:

Fertilizing with urea (1-2 tablespoons per bucket or square meter of bed when incorporating dry matter into the soil).
The second time you should water the nitrophoska (or a specialized product for bulbous crops). 2 spoons per square meter or per bucket of water.
The third time, superphosphate and potassium sulfate are added. For a ten-liter container you will need 2 spoons of both drugs.

Organic

You can get a large head by watering the onion with organic matter.

We feed with ammonia (recipe above) or chicken droppings. We prepare a concentrate (1 part litter to 20 parts water), leave it for 1.5 - 2 weeks, then dilute it 1 to 20 with clean water and water it.
We use wood ash. The second time, it is best to water with a solution of wood ash (2 - 2.5 cups per regular bucket of water).

ON A NOTE. Instead of chicken droppings and ammonia for the first time, you can water it with mullein infusion or green fertilizer from mowed weeds.

There is a secret remedy that will help onions grow large. This is ordinary yeast.

After you have watered the onions with organic matter, count 7-10 days and feed them with a yeast solution.

Yeast microorganisms will process organic matter and release beneficial elements. To prepare, mix a packet of baker's yeast and 5 tablespoons of sugar in a bucket of water.

The mother liquor ferments for 5 days, after which a working mixture for irrigation is prepared on its basis. Proportion 1 to 10.

BY THE WAY. After feeding with yeast, you can scatter dry ash over the garden bed. This will further increase efficiency.

What drugs to use against pests and diseases to prevent onions from turning yellow: list, recipes for use

Where there are plants, there are always various insects that feed on them, and thereby harm the entire crop. Preventing the occurrence of diseases and damage to onions is much easier than dealing with already yellowed feathers.

It is very important to treat the area before planting, and you should also make sure that there is high-quality planting material without damage.

Drugs are divided into 3 groups:

Insecticides – help fight insects and pests
Fungicides – with diseases
Herbicides – with weeds

In order to ensure a lush harvest, it is necessary to carry out timely fertilizing and tillage of the soil. This will protect the plant from external factors, insect attacks and allow the plant to be more resistant to disease. For example:

Option #1:

For 10 liters of water 2 tbsp. "Vegeta" fertilizer, 1 tbsp. urea is the first bait
1 tbsp. "Agrkola 2" for 10 l - second feeding
Third feeding - 2 tbsp. "Efferon-O" 10 l

There is a 2 week interval between feedings.

Option #2:

First feeding - for 10 l - 30 g of ammonium nitrate, 50 g of superphosphate and 25 g of potassium
For 10 liters – 30 g ammonium nitrate, 70 g superphosphate and 30 g potassium
For 10 l – 40 g of superphosphate and 20 g of potassium chloride

Such methods will allow you to protect the onions as much as possible and ultimately get a good harvest. The main thing to remember is that excessive fertilization, especially using non-organic products, negatively affects the composition of the vegetable.

Preventative measures against yellowing of onions

It is best not to fight negative consequences, but to prevent them. To grow a bountiful, healthy harvest, proper agricultural practices are required:

Mandatory treatment of seed material before planting.
Regular watering in the required quantities.
Well fertilized soil.
Prevention from diseases and pests.

If you follow all these rules, there is a high probability that the problem of yellow feathers in onions will not affect you and the growing process will only bring pleasure.

What folk remedies to use to prevent onions from turning yellow: list, recipes for use

Before running to the store for chemicals, at the first sign of damage to the plant, and also, in order to prevent onion diseases, you can use traditional methods. These include:

Chicken manure – enriches with nitrogen and nutrients
Also, manure infusion helps with nitrogen deficiency
Saline solution
Mullein
Proper care and watering

It is very important to loosen the soil and water young onions, but already ripe ones can not be watered too often; they will age over time and begin to dry out, but to prevent this from happening earlier, you need to water them rarely, but abundantly. It is worth remembering that if the moisture is exceeded, the bulb begins to rot.

Proven combinations of feeding from natural products:

Dilute mullein and bird droppings with water (1:5), and dilute 100 ml of the resulting mixture with 10 liters of water
Herbal tincture: 300 g of dry herbs per 1 liter of boiling water. Leave for a week. Dissolve this infusion in 9 liters of water
Wood ash – 300 g, pour 10 liters of boiling water and let it brew for 3 days

How to understand that onions do not have enough fertilizing in June

When a plant lacks nutrients, the quality of the crop decreases markedly. Lack of fertilizing in bulbous plants is always associated with certain symptoms.

Nitrogen deficiency

The leaves turn pale or take on a green-yellow color, and the tops dry out. Feathers may become stiff or, conversely, too flaccid. Signs become more pronounced with overwatering and exposure to low temperatures.

What to do if there is not enough phosphorus

Plant growth slows down. There are very few new leaves, and brown and yellow spots appear on the old ones. Onion feathers gradually die off from the tops to the base. The deficiency of the substance is severely manifested when grown in clayey or poorly drained soil.

What to do if you have a potassium deficiency

You can observe yellowing leaves with curled dry tops. Necrosis of plant tissue occurs. The grown bulbs are not completely covered with husks and are small in size. Potassium deficiency is caused by heavy rains and heavy watering, followed by hot weather. Under such conditions, the earth dries out and becomes clogged.

Copper deficiency

The onion feathers turn yellow, then turn pale and thin. This condition is usually caused by excess peat or organic fertilizers in the soil.

Manganese deficiency

The leaves curl and turn yellow. The neck of the onion becomes thick, and onion growth slows down greatly.

Zinc deficiency

Plants do not grow in height, and their leaves are very curled or even fall to the ground. Old leaves become covered with orange spots, and on young leaves specific, gradually yellowing stripes appear. Zinc deficiency can most often occur on alkaline soils with a pH of about 8.

What to do if you have a boron deficiency

Onion feathers become sharpened, wrinkled and cracked, and their color becomes dark.

IMPORTANT! There may not be clear symptoms, but these signs will help you decide which fertilizer to use in a particular case.

An accurate answer about what fertilizers the plants lack can only be obtained from a soil analysis carried out in a specialized laboratory.

How to use ammonia to prevent onions from turning yellow: recipe

Ammonia is an excellent means for disinfecting and fertilizing the soil. This is one of the main sources of nitrogen, which is necessary for the full growth and development of onions. In addition to containing nitrogen, ammonia has a fairly strong aroma, which perfectly repels pests and insects.

Ammonia solution is also useful for soil, because... reduces acidity, thereby improving the structure. If the tips of the pen turn yellow, you need to dilute 60 ml of alcohol in a 10 liter bucket. This is used if a lack of nitrogen is detected in the soil. If the cause of the damage is a weevil, you need to dilute 50 ml per bucket of water.
You need to be careful with ammonia, because it not only fights pests, but also saturates the soil with nitrogen, an excess of which directly affects the fruits. The leaves become rough and have a rich green color. Not only the structure changes, but also the taste of the product.

That is why it is very important to find out the source that provokes yellowness, and only then use this remedy. Depending on the cause of the damage to the onion, the ratio of water and alcohol changes.

Why do onions turn yellow?

The main value of onions is their juicy green feathers, which are used for cooking and preservation. If the onion turns yellow in August, then there is no reason to be upset, since this is an absolutely natural process. But if the feathers began to turn yellow at the beginning of the season, this is a reason to be wary and immediately take action, since the plant is clearly under stress. There can be many reasons: from the invasion of pests and diseases, to problems with the soil and improper care system. What to do if onions turn yellow? Find the root of all troubles. Let's talk about this below.

Pests

The most common cause of this scourge is insect pests, such as onion fly larvae. They are capable of destroying an entire garden bed in a short time. To prevent attacks, do not delay planting bulbs in open ground so that the plants have time to grow strong and resistant to any climate change. It is also necessary to regularly inspect the beds and carry out preventive treatments.

Diseases

If the onion turns yellow and begins to rot, then it is worth suspecting that the garden bed has been damaged by pathogenic fungi and viruses. There is no treatment in this case. Rotting plants are removed and burned, and the remaining healthy ones are treated with fungicides.

Lack of moisture during dry weather

When the feathers of an onion turn yellow during a long, hot summer without precipitation, the reason certainly lies in the weather. Especially if watering was rare and not plentiful. It is recommended to moisten the soil more often with warm water (at least 2 times a week).

Effect of low temperatures

Onions also turn yellow when planted early, when night temperatures still drop below zero. In this case, the young leaves freeze and subsequently dry out and turn yellow. In this case, dry ash, which is thickly sprinkled on the beds, will help. In a couple of days, after using it, the condition of the bed should improve noticeably.

Onions require fertilizing

One of the most common, but far from the only reasons why onions turn yellow is a lack of micronutrients in the soil. If you are absolutely sure that this is the reason, one or two complex fertilizing with the necessary substances will be enough for the onions to turn green and begin to grow with renewed vigor.

How to use iodine to prevent onions from turning yellow: recipe

Iodine is a well-known antiseptic that is used for wounds and cuts. But iodine is also very popular as a fertilizer.

Iodine is simply necessary for normal human life and is responsible for metabolism and growth. Plants also need iodine, because it affects productivity, enriches vegetables with vitamin C, and affects taste, color and aroma.
Medical iodine 5% is suitable for fertilizer. It strengthens the “immunity” of plants, but you need to use it very little, because... Iodine is a toxic substance.
You need to fertilize the onions with iodine solution in three stages at equal intervals. To do this, you need to dissolve 1 drop of iodine 5% with 3 liters of water. If the plants are weak or damaged, you can increase the amount of iodine to 3 drops per 3 liters of water.

Iodine solution is used for both root and foliar feeding. Iodine helps cope with various fungal diseases, which is quite common among all types of onions.

How to use yeast to prevent onions from turning yellow: recipe

Regular baker's yeast is rich in nutrients, iron and various microelements. Therefore, it is excellent for fertilizing onions and other plants. Traditionally, for feeding, 1 kg of yeast is diluted in 5 liters of water, and then in a ratio of 1:10 with water.

The peculiarity of this method is that the yeast works only in heat, that is, the solution cannot be introduced into unheated soil. If you use dry yeast, then you need to adhere to the following proportion: 10 g of yeast per 10 liters of warm water, add 2 tbsp. sugar and let it brew for 3-4 hours, and then dilute it with water in a ratio of 1:5 and you can water it. Such watering affects the development and growth of onion feathers.

Yeast for fertilizing onions

Another effective recipe:

100 g dry yeast
0.5 cups sugar
3 liters of water

Stir and cover with gauze, leave for 7 days. Dilute 1 glass of this mixture in 10 liters of water and water before lunch. You should not get carried away with yeast procedures; bait should be applied no more than 3 times in one season.

Nitrogen deficiency

In this case, one completely logical question arises: how to feed the onion plant, because diagnosing this condition is very simple. Not only the onion, but also all other crops that are located near the onion fall within the damage radius. In a short time, the tips of their leaves turn yellow and dry, they become more faded in color, the fruits change shape and seem to shrink.

Even in this case, you can observe the bending of the edges of the leaves, and spots similar to lichen appear on them. This is often caused by a long rainy season or by the fact that the garden is watered too much. Then the beneficial substances are simply washed out from the top of the earth into the depths, where they become inaccessible to the roots. In order for the harvest to be good, the plants need to be fed. If the onion feather turns yellow in places, darkening and pronounced lethargy of the arrows appear on it, it’s time to start preparing fertilizer.

When the process of yellowing of the onion occurs and the reason for this is a lack of nitrogen, in order to cure the onion plant it is necessary to apply fertilizer. Careful and proper care will help quickly restore normal condition. Professionals warn that non-compliance with the dosage and excessive nitrate nutrition triggers active vegetative processes. That is, the gardener will observe a rapid increase in green mass, which develops to the detriment of the root crop. This is bad initially when onions or heirloom onions are planted, because planting such varieties provides for a good, rich harvest.

How to make a solution

The solution consists of the following ingredients:

Food waste (it must be of vegetable origin: peelings from vegetables, grounds from coffee or tea, etc.).
Green grass, thanks to which you can get additional vitamins.
Weeds, if there are none, seeds will do.
Straw, hay.

Water is poured into a large container, ideally it will be rainwater, and everything that was collected is added:

hay;
grass;
peeling vegetables;
crystallized honey;
expired condensed milk;
sour wine;
a few spoons of sugar.

This mixture must be stirred thoroughly, then left until active fermentation begins, which will be indicated by a strong aroma. If it is hot outside, then the solution will need several days (up to 5) to be ready; if the weather is cool, it will take 1.5-2 weeks. Next, take 1 liter of nitrogen fertilizer, dilute it in 10 liters of water, and water the onion plant with it.

It is best to fertilize root crops in the garden during rain or when the ground is still wet. If it’s hot outside and no rain is expected, then the garden needs to be watered first. Plus, urea, which many know as urea, is used as mineral fertilizers. It must be used with extreme caution, as it promotes the appearance of fungi.

The product provides high-quality care, because if the bulb, due to certain conditions, does not receive enough useful components, you can see yellowing leaves, spots, etc.

How to use salt to prevent onions from turning yellow: recipe

Saline solution is used for onions if they are rotting. The salt mixture helps disinfect the plant and soil, repels various insects and pests.

At the first signs of yellowing, you need to dilute 200 g of table salt in a bucket of water. This product is especially helpful in combating onion flies. The main thing is to carefully ensure that salt does not get on the stems of plants, this can damage them and lead to death. That is, water the saline solution only at the root.
Water with saline solution no more than 3 times per season, for preventive purposes. And you need to start in early spring, before the snow has completely melted.
Processing must be performed in the evening, almost before sunset.
Also, it is worth remembering that onions should be watered with saline solution no more than once every 3 weeks.

If you are carrying out treatment to destroy pests, then the first time you need to dilute 200 g of salt in a bucket, but if it does not help to completely get rid of the insect, the amount of salt should be increased to 450 g. An excess of salt in the soil will negatively affect the fruits, and this does not apply only onions. The fact is that salt contains sodium and chlorine, which in large quantities inhibit the growth and development of the plant. They also stimulate the leaching of beneficial substances from the product.

Onion fly

If your onion arrows have begun to slowly wilt, you can check the green feathers for onion fly larvae. In a garden bed where green and tasty crops are densely planted, breeding pests are quite common. The yellowing effect appears due to a large accumulation of larvae. Timely prevention helps prevent the proliferation of pests that lead to the death of the plant.

The leaves are an ideal environment for fly larvae; the nutritious stems allow the eggs to be kept alive while they grow. You can plant bulbs of any kind next to carrots, then no flies will become a problem. The smell of carrot tops in the garden drives away all onion pests.

Actions to save from eggs that cover all onion leaves are as follows:

do not plant a crop twice in the same place;
do not isolate the bed from other plants;
a solution of hydrochloric acid (metronidazole or spraying with ammonia from water) helps against yellowing;
To prevent yellowing, you can wipe the leaves with an ordinary concentrated saline solution if no other substances are at hand.

Other pest species include onion nematodes, flies and secretive proboscis. The leaves and stems are the first to be affected by insects. Green onion becomes infected from just one larva or healthy individual. Flies are brought from the environment or remain to overwinter in the place where the onions were previously planted. From such pests, a yellow tint appears on the central part of the feather, and not on the tip. Sevok is not infected with fly larvae at all.

It is also recommended to treat healthy crops with salt, the leaves of which have not yet been infected by insect larvae.

Green arrow suffers from yellowing in the first weeks after planting. At this time, sleeping insects appear. Pests begin to actively reproduce from the first days of awakening. Water with salt makes plants unsuitable for onion flies. You will be able to obtain the desired solution if you maintain the proportion: two parts water and one part salt.

Why does the onion shoot and quickly turn yellow: causes, treatment

The arrow is a peduncle on which seeds are formed after flowering. It is necessary for propagation, but is dangerous for those varieties that require a bulb when planting. The bow can shoot an arrow in the following cases:

The size of the planting bulb is more than 3 cm
Sudden temperature changes or increased soil moisture
If the soil has not yet warmed up when planting.

The bow shoots an arrow quickly.
To avoid the appearance of arrows, you must adhere to the following rules:

Choose the right planting material. A bulb less than 1 cm in diameter is least likely to shoot arrows. Very large - almost always.
Do not plant onions when the soil is still cold; it is not recommended to do this until April 25
2-3 weeks before planting, place the bulbs on a wooden surface and on the radiator
Store small planting material cold. Which involves storing vegetables at a temperature of 1-3°C below zero.

If the bulb shoots an arrow, then it should be cut off to the very base. There is no need to be upset about such arrows, because this product is ideal for canning and marinades.

Pest attacks

Pests bring a lot of trouble to onion plantings. In the fight against them, as with diseases, prevention comes to the fore. It is easier to prevent the appearance of dangerous insects than to exterminate them and use toxic drugs.

Among the “enemies” of the vegetable that cause yellowing of the feather:

thrips are small insects, up to 0.8-1 mm, that feed on leaf sap. Their appearance can be judged by yellowed feather tips, silvery strokes and dots on the greenery. In addition to damage to the leaves, the scales and neck of the turnip are deformed; PHOTO 5
onion fly . If the tips of the leaves of onions turn yellow, then the culprit is the larvae of the pest. They feed on turnip pulp, affecting the internal and external scales; PHOTO 6
onion secretive proboscis . The larvae eat long passages in the green pulp of the leaves. The plant turns yellow and fades; PHOTO 7
onion moth . The appearance of longitudinal lines on the feather, a change in the color of the tips of the leaves from green to yellow - signs of the presence of moth larvae;
nematode . Microscopic worms (up to 1-1.3 mm), damaging leaves and turnips (bottom) of the crop. There is no effective treatment; the pest is considered quarantine.

Onions turn yellow, rot from rain and excess moisture: what to do to save onions?

There are many reasons why onions can rot, for example, high soil moisture, various pests entering the bulb, for example, stem nematodes or root mites.

If you need to fight rot caused by pests with various special solutions and fertilizers, then it is more difficult to withstand weather conditions. It is very important to monitor the rotting of the onion; it is better to immediately dispose of the infected vegetable, because this threatens the destruction of the entire crop. Rot bacteria can spread to other fruits.

Of course, it is better to grow a plant in a greenhouse, this will make it easier to regulate temperature changes, timely watering, etc. If this is not possible, then the onions should be planted in shallow trenches covered with a small amount of sand. Especially if the plant is planted in clay soil, which retains moisture for as long as possible.

During periods of heavy rain, the sand will act as drainage and release water deeper. You should avoid watering onions in the morning, especially when there is heavy dew.

Onion feathers turn yellow if agricultural practices are violated

Of course, onions can turn yellow due to dry weather, lack of nutrition, frost, or improper storage of sets and excessively acidic soil.
But all these reasons are not so common. Still, every gardener tries to water, feed, and cover if necessary. But if suddenly no signs of pests or diseases are found, and the onions turn yellow, we will try to correct this misunderstanding with the help of timely watering and fertilizing. Onions are not notorious lovers of moisture. We water it moderately - no more than twice a week, provided that there is no rain. In the second half of summer, we stop watering completely.

How can you feed onions to prevent them from turning yellow? Any fertilizer rich in nitrogen will do. Here are some options:

Dilute 30 grams of ammonium nitrate, 40 grams of superphosphate and 20 grams of potassium chloride in 10 liters of water;
Infuse 1 glass of mullein in 10 liters of water for a week. Then add a tablespoon of urea, and the fertilizer is ready;
We dilute 3 tablespoons of ammonia in a bucket of water. Protection against onion flies and nitrogen fertilization - two in one.

In addition to (or even instead of) fertilizing, you can spray the onions with growth stimulants. Epin, NV-101, Rostock, Energen, etc. dilute according to the instructions and pour into the sprayer. Treatment with boric and succinic acid is no less effective. Dissolve 1 gram of boric acid in 5 liters of water and spray the plantings. After a couple of hours, prepare a solution of succinic acid at the rate of 10 tablets per 5 liters of water. And we carry out the second spraying.

What to do if the tops of onions and the tips of the feathers turn yellow?

Yellowing of the tips of the onion feathers indicates that you need to take immediate action to save the rest of the harvest. Before you start fertilizing and carrying out rescue procedures, it is worth finding out the true cause of the damage to the plant.

The main ones are nitrogen deficiency, pest interference, lack of water, and changes in weather conditions. Of course, if the plant is already aging, then yellowing is a normal process.

Onion yellowing

Depending on the cause, different treatments are prescribed for onions, but first you can feed the plants, because in most cases the problem is that the plant simply does not have enough nutrients from the soil. For this you can use the following fertilizers:

Manure
Chicken droppings
Ammonia solution
A comprehensive set of fertilizers using phosphorus or potassium fertilizer.
Particularly popular is a saline solution, which not only nourishes the soil, but also destroys pests.

Despite the fact that onions are unpretentious in cultivation, do not forget about the rules of storage, planting, proper watering and preventive feeding of the plant, otherwise the harvest may not please you.

Weather

Unfavorable weather conditions can cause the onion to begin to turn yellow and “lay down”, even if all other conditions for its growth are met. In case of heavy rains, the beds are covered with film, and the soil is sprinkled with a mixture of ash and sand. In case of drought, precious moisture can be saved by watering them in the morning and mulching the ground.

If the tips of the onion turn yellow because they have been hit by return frosts, no measures should be taken; the feather will grow back over time.