Green onions turn yellow. Why the onion dries in the garden - possible causes and solutions
Onions have not only culinary value, but also pharmaceutical. Therefore, summer residents with great pleasure grow it in their garden. Yes, that summer residents, even city dwellers, and those on window sills and small beds near houses cultivate this vegetable. When you have allocated a place with great difficulty, it’s a shame when the onion turns yellow in the garden and stops growing, what to do in this case? Today we will answer this question.
- The impact of pests;
- Diseases;
- Not proper care;
- Bad weather;
- Not enough nitrogen.
But when the seedlings do not grow, then most likely the reason was insufficient watering.
Pests and their control:
- onion moth;
- Nematode;
- onion fly;
- Secretive trunk (weevil);
- Thrips.
Onion moth.
This is a nondescript butterfly, dark Brown, with light gray wings. The body length is about 0.8 centimeters. This pest appears in May, and its activity occurs at night. At this time, females lay eggs, which turn into caterpillars after a week. It is very small, green, but dangerous.
- Moth does not threaten plantings if they are made very close to carrot plantations.
- Loosen the soil.
- Treatment with decoctions: tobacco, garlic tincture, ash infusion.
- Preparation "Iskra" 1 tablet per 10 liters of water. The preparations also showed themselves well: "metaphos" and "summer resident".
- It is also recommended to start sowing seeds early so that you have already harvested before the peak of this problem.
- Do top dressing with the following mixture: pepper, wood ash, tobacco dust, this procedure should be done during the flowering of dandelions.
Onion moth is a terrible enemy Nematode.
These are underground inhabitants, they feed on pulp, as a result of which the process of decay begins. The stem may also suffer, it begins to turn yellow and dry out.
Damage to the fetus by nematodes Thrips and how to deal with them.
These small insects, their body length is about 1 millimeter, also affect other vegetables, such as: pumpkin, zucchini, squash, can become. They are light yellow, sometimes dark brown. Dangerous both in greenhouse conditions and in conditions open ground even under storage conditions.
Damage symptoms: Appear lightly yellow spots, which later merge into one big one. The tips of the leaf turn yellow and dry.
Control and prevention methods:
Prevention:
- Crop rotation;
- Before planting, dip the bulb for 10 minutes in hot water (this method is also effective against nematode damage);
- In autumn, be sure to dig up the soil;
- Weed control;
- Treat the plant with tinctures of yarrow herbs, or with biological products: fitoverm, boverin.
How to do it:
In the event that the prevention did not help, and thrips appeared on the onion, the following should be done:
- With a small infection, we act with folk methods - treat the crops with a decoction of capsicum; mustard; celandine or tobacco;
- Water the soil near the root system with a solution of "confidor";
- If all of the above did not help, use insecticides (intavir, zeta, karate, agrovertin)
Onion fly, how to deal with it.
Outwardly, it is not much different from ordinary flies, which we are all used to watching in the summer. The size is about 0.8 centimeters, the color is gray, with yellowish or ashy hues. But this pest, in addition to being annoyed by its presence, also brings tangible harm to your garden. Females lay their eggs in the garden or on the vegetables themselves, and after hatching, the larvae immediately begin to absorb the flesh of the fruit.
The pest is active from April to the end of summer. During this time, it manages to change 2-3 generations. The pest is widespread throughout the globe, and very dangerous. In addition, garlic, all types of lettuces, and some types of flowers, especially tulips, are also threatened. Therefore, it must be fought against.
Fighting methods:
Exist like chemicals, and folk methods. But when using the former, be prepared for the fact that the quality of the crop will suffer significantly, because some of the poisons will remain in the turnip.
Folk remedies:
- Spray the beds with tinctures following plants: valerian, tomato, mint, fir, wild rosemary, needles.
- On the same bed, plant rows of onions, and rows of carrots, it repels the onion fly, besides, the carrot fly will leave the garden from its smell.
- Water the beds with a solution table salt. 300 grams of salt per bucket of water, after the sprouts have reached a height of more than 5 centimeters. After 2-3 weeks, the procedure is repeated, but this time 450 grams of salt are dissolved in 10 liters of water.
- Sprinkle the plantings with wood ash on a regular basis, this is both protection and fertilizer.
- Observe crop rotation.
- Certainly, in autumn time do deep digging of the garden.
- in a solution of potassium permanganate.
Chemicals:
- "Flycat";
- "Karate Zeon";
- "Aktara";
Chemicals are most often used in industrial scale, private gardens are not cultivated by them.
Weevil or secretive proboscis:
A small bug, its length barely reaches 2.5 millimeters. Gray color, oval shape. After waking up from hibernation, these insects begin to harm the vegetable, white spots appear on it. They also eat young shoots and lay eggs. After 2.5 weeks, their offspring appear, they also feed on a vegetable, while its leaves begin to turn yellow and dry.
Fighting methods:
The only effective remedy is prevention.
- After harvesting the vegetable from the garden, thoroughly inspect it for the presence of weevils.
- Very carefully carry out the procedure for cleaning the beds, all residues must be destroyed.
- It is necessary to constantly carry out crop rotation on the site.
- Loosen the soil, to a depth of 3-5 centimeters.
Nitrogen deficiency:
The onion feather turns yellow when there is not enough nitrogen in the soil. It is most felt in dry and hot weather. But even when the weather is constant rainy, this problem can also appear, because the water will wash out all the useful substances from the soil, including nitrogen.
You can replenish its deficiency with tincture of mullein. Also use ammonium sulfate, nitrate.
Apply nitrogen on time as soon as you notice its shortage. Onion diseases.
Diseases are a very common cause of yellowing of the pen, let's look at this issue in more detail.
Fusarium.
This disease is also known as bottom rot, it also affects garlic. It appears as yellow-brown stripes on the leaves. They gradually increase, after which they begin to merge into one big one. The fungus, as a rule, is located on the bottom, and spreads to the root, and it begins to turn pink. Then the process of dying begins. Those individuals who were affected are very poorly stored for no more than a month.
How to do it:
- Choose varieties that are resistant to this disease, especially if you are agriculture on an industrial scale;
- Observe crop rotation;
- "Fungicide Quadris" is used to stop the spread of the disease in the garden.
Alternariosis.
At first, these are ordinary white spots on the feather, then they grow and change their color, to purple with a brown tint, these are already spores, fungi make themselves felt. Sometimes spots in a white rim. Further from the pen, the disease is directed to the fetus, brown or black mold appears.
The cause of the damage may be an excess of nitrogen in the soil, or high humidity.
What to do:
- Carry out a crop rotation;
- After harvesting, destroy all remnants of vegetation.
- If the weather is wet, you can carry out preventive treatments of plantings using the following preparations: Acrobat MC, Cabrio Duo, Consento, Polyram DF, Shirlan 500 SC.
Root rot.
brown spots, which spread in the lower part, as a result of which root decay begins. The most dangerous period is considered the first weeks after planting the seeds, as a result of the defeat, seedlings may not appear at all. The main causative agents of the appearance of the fungus are: high soil moisture, and low temperatures(below +10C).
Pink rot (pink root).
From the name of the disease it immediately becomes clear how it manifests itself. root system gradually dies off, and at the top you can observe how the onion feather begins to turn yellow. All due to lack nutrients in the stem, also the color can be white or brown, the process starts from the edges.
The spores of the fungus can persist in the soil for several years, waiting for the right client to begin their reproduction on its surface. Most often, the trigger for development is increased soil moisture. The optimal temperature regime for its development is +26..+28C, at a temperature of +16C and below, its activity is significantly weakened. It strikes pink rot, as a rule, weak plants that are under stress.
- Grow a turnip or leek during the period when the disease is not active (the soil is not warmed up to a temperature of +26..+28C).
- Choose disease-resistant varieties.
- Rotate vegetable crops Location on.
- Polarization and soil fumigation procedures will help to loosen or destroy the spores.
Grey, neck rot.
The causative agent of this disease is the fungus Botrytis Munn. The very first and very typical symptom will be the softness and weakness of the neck of the onion, a plaque will appear on it. gray color. As time passes, small black sclerotia appear there. Further, as it develops, the entire plant is completely covered with bloom. Plaque can appear not only on the neck, but also on the side or from the side of the bottom, through mechanical damage.
Infection with the fungus occurs during harvesting, or immediately before it. Only weakened leaves are affected, after some time the pathogen penetrates into other tissues. High humidity and high temperature ideal conditions for pathogen development. Only at a temperature of 0C does its development stop. During storage, it can spread to healthy plants.
If you planted infected material, its feather begins to quickly turn yellow and dry. At high humidity the plant is covered with gray mold.
- When planting, inspect the seedlings very carefully, and discard the infected ones;
- After harvesting, remove all plant debris from the garden;
- Plant a vegetable in a new place, and return it to the old one only after 3 years;
- Sow early and plant sevok;
- Choose resistant varieties;
- Properly store and remove it from the beds.
Proper care of the onion is necessary so that it does not turn yellow in the beds.
Watering, fertilizing, loosening, removing weeds - the key to a good harvest To prevent the feather from turning yellow in the beds, the plant needs proper care. Especially when it comes to watering, due to excess moisture, such problems most often arise. Therefore, there should be about 7 - 9 waterings per month.
It is also very important to loosen the soil, because if this is not done, an earthen crust forms, due to which the plant begins to dry out. Timely removal of weeds is simply necessary. Top dressing, the third important procedure that should not be neglected.
The process of loosening begins to be carried out as soon as the first shoots appear. But do not cover the onion with earth, because this, as with deep planting, stimulates the growth of the feather, but not the fruit itself.
Top dressing.
If your garden has poor soils, then fertilizing is a must. As a rule, the first top dressing is carried out after 3 weeks from planting, the second time fertilizers are applied, after another 15 days.
For the first time, 60 grams of ammonium nitrate, 100 grams of superphosphate, 20 grams of potassium chloride per 1 m2 are added. The second time they add: 60 grams of ammonium nitrate, 40 grams of potassium chloride. As you can see, the second dose potash fertilizers increases, while the proportion of nitrogen remains the same.
To feed young plants, use bird droppings, it can also be replaced with mullein, it is diluted with water in proportions of 1 to 10. Add to a bucket of tincture Matchbox ammonium nitrate. This solution is enough for ten square meters of soil.
In the event that after planting, until the moment of fertilization, there was no rain, then it is necessary to thoroughly moisten the ground on your own.
If the weather is dry, water the soil regularly, but not more than 7 times a month, 3-4 weeks before harvesting, wetting should be stopped. If your sevok began to develop into an arrow, then they need to be broken almost to the base. Since if this is not done, the fetus itself will not develop, but if, after this operation, the feather begins to grow again at an accelerated pace, then such a plant is removed from the garden.
To make the vegetable develop better, there is one tricky farm trick. With a sharp shovel, cut the roots below the bottom by 5.5 centimeters. After that, the feather will begin to turn yellow, and the bulb itself will ripen much faster. The main thing is to do this trick, not earlier than the first days of August.
If the leaves turn yellow on the beds near the onion due to weakness, then it must be fed with the following solution: add a liter of litter to five liters of water, leave it to infuse for several days. After that, we dilute a liter of tincture in a bucket of water, and water the garden.
Another method of healing is as follows: 10 liters warm water, add a few handfuls of ash, an ampoule of ammonia, 100 grams of salt. Stir, and pour, very carefully so that the tincture does not fall on the pen. Thus, you carry out prevention from diseases and pests.
That's all the reasons for the problems of yellowing of the onion feather. As you can see, there are quite a few of them, and the methods of elimination are different. Therefore, you need to accurately determine the cause of the disease, and only then begin to eliminate it. It is very difficult to cope with many diseases, it is much easier to prevent them. Do it on time, carry out the soaking and soil treatment procedures, and then no problems will affect you. On this we say goodbye to you, good luck and see you again.
It is simply impossible to imagine cooking without onions. This useful ingredient is used in almost all dishes: first, second, baking, canning, even red onion marmalade is prepared.
Onion yellowing due to pests
It would seem that there is nothing easier than growing onions - these are not capricious tomatoes or tender overseas eggplants. So why does the onion turn yellow in the garden, and what to do about it? Let's figure it out.
onion fly
Dangerous for all types of onions (chnit, shallot, leek). In the month of May, the fly lays its eggs, and a week later the voracious caterpillars begin to eat the bulbs. The plant first turns yellow and, if no action is taken, the onion will die..
As a preventive measure, it is advisable to plant the onion as early as possible so that it has time to get stronger before the invasion of the larvae. Choose carrots as your onion neighbors: flies do not like its smell.
How to save an onion from an onion fly if it has already appeared on the beds. In May, when the fly begins to lay eggs, powder the plants with a mixture: wood ash 200 g, tobacco dust and ground pepper 1 tsp each. (per square metre). Suitable for larvae control preparation "Creocid PRO", the solution must be sprayed on the plants.
Another way to get rid of an insect used by the people: 200 g of salt, 10 liters of water, a few ml of ammonia. Salt solution is watered during the development of the feather (the length of the feathers is about 8 cm). It is advisable not to get on the feathers, pour under the bulb.
What is dangerous secretive proboscis: it eats leaves, and its larvae gnaw out entire trenches in the leaves. Onions lose their presentation, turn yellow and die.
When a beetle appears, doing loosening and weeding the beds, powder the soil wood ash or pepper, dry mustard. If there are too many pests, treat the plantings with Karbofos (60 g per 10 liters of water).
This microscopic (1mm) insect lays a colony of eggs directly in the tissue of the leaves, sucking out all the juices from the plant together with its offspring.
To protect yourself from them, as a preventive measure, you need to observe crop rotation, clean the soil after harvesting and treat onions before planting (keep the seed in water up to + 45°C). When a pest appears, spray "Confidor" (1 ml per 10 liters of water), "Spark" (1 tablet per 10 liters of water).
Adult insects and their larvae begin to eat onions from the bottom, it is impossible to notice them.
Nematode dangerous in that it is impossible to notice, it settles in the ground for many years. You can fight it by preventing its occurrence.
The causative agent of the infection is the affected onion, wintering among other bulbs. Infected onions do not differ externally from healthy ones, so it is difficult to detect the disease right away.
After planting, diseased plants develop and grow without problems for about a month, but then the leaves turn yellow and wither. On the surface of the leaf plates, you can see a coating that looks like dirt.
The infection is transmitted to healthy specimens through the air and during precipitation. Since humidity and heat serve as favorable conditions for the development of the fungus, monitor the temperature and ventilate the room when storing onions.
Preventive measures: crop rotation, early sowing, the exclusion of manure when fertilizing, the use of fertilizing with nitrogen and superphosphate, before planting, the treatment of seedlings by heating up to 8 hours at a temperature of 40 ° C.
You can fight the fungus by spraying "Fitosporin" or "Fito-plus". This the best option: after processing, the onion can be eaten after 2 days.
Anthracnose on leaves appears as dark green spots and circles. The leaves change color, deform and dry. How to process the onion so that it does not turn yellow and does not deteriorate? Plants can be sprayed with the following compositions: blue vitriol, Bordeaux liquid or copper chloride.
The fungus settles in shady places and in thickened plantings. Thin out seedlings, plant in open sunny beds, and clean them up after harvest. The infection spreads from the remains of plants or their seeds.
Attention! After treatment with copper-containing solutions, onions should not be eaten for 3 weeks.
cercosporosis
If brown spots with a yellow edging appear on the leaves, this is cercosporosis. This infection overwinters in unharvested plants and their seeds. In the spring, with new plantings, the fungus is transmitted to seedlings through the air or raindrops. Remember to clean the soil well after harvesting. Drugs will help fight the fungus: "Fitosporin" or "Fito-plus".
A common disease that accompanies onions - neck rot. It is impossible to fight with it, because when it enters the open bulbous neck, the onion rots. This disease manifests itself during storage of the crop. It should be noted that in rainy summers, onions must be dried well before being stored in a storage place.
Did you know? The first written mention of the bow is found in the Bible. When describing all the hardships of the life of the Israelites in slavery, it is mentioned that they ate onions. The ancient Greeks valued onions for healing properties, but considered the food of the poor.
Quite often, the tips of the onion turn yellow, why this happens - we will consider further.
A common disease for all types of onions - bottom rot.It affects the bulb during development, while onion feathers suffer, turn yellow and dry. The bad thing is that this disease can only be prevented.
Carefully choose a place for landing: there should be no stagnation of moisture. If you find an infection, plant onions in this area no earlier than 5 years later.
Decontaminate seedlings before planting, and the best predecessors for onions are cereals. Properly store the crop, do not neglect compliance temperature regime, humidity and ventilation.
Improper onion care is one of the causes of yellowing
Many diseases in plants appear as a result of non-compliance with the standards of care for them, inattention during harvesting and neglect of methods for disinfecting storage rooms. horticultural crops.
Onion is a non-capricious culture, resistant to temperature extremes, drought, long rains, not very demanding on soil and care. Beneficial features it is difficult to overestimate it - the most sought-after vegetable in any kitchen and the main winter healer. Onions are grown everywhere, occupying an honorable third place in the ranking of popular garden crops after potatoes and cabbage. The process of forcing a feather and cultivating beautiful root crops is an exciting and rewarding activity, but only if the plants do not get sick.
Weather problems
Most common problem onion beds - sudden yellowing and drying of the tips of the pen. Without finding out the cause of this phenomenon, you should not run around in a panic with a sprayer and bring the entire periodic table into the ground. A simple drought can cause such a reaction. High temperatures within a week, the lack of precipitation and watering leads to a violation of sap flow, but not to a loss of the ability to increase the fruit mass. Of course, green beds look more beautiful than yellowed ones, but the goal of gardening is not only aesthetic pleasure. The final result - large, filled onion heads - is not affected by this drying.
A similar problem may haunt gardeners who know about the frost resistance of the crop and planted the seedlings too early. The frostbitten tips of the seedlings soon turn yellow and dry out, giving the same picture as during a drought, but without affecting a full-fledged crop.
Onions turn yellow from weather conditions - how to feed?
If the cause of drying is in return frosts, then the care of the beds does not change in any way. The feather will grow back, the dry tips in the total green mass will be invisible to either the host or the plant. If the weather is dry for a long time, the site should be watered with sprinkling for 2-3 days in a row. To restore the strength of damaged plants, sprinkle the ground between them with ash in the calculation of a half-liter jar for 1 square meter or spill with ash solution. To prepare it, you need to dilute the same amount of ash in a bucket of water and leave for 3-4 days, stirring regularly. The yellowed tips will no longer turn green, but the plant will quickly get out of a state of stress.
Lack of nitrogen
Another reason for the yellowing of onions is an acute shortage of nitrogen in the soil. Diagnosing this "disease" is easy - it affects, as a rule, not only onions. All crops living in the neighborhood also become faded in color with light veins, the fruits become smaller and change shape, sometimes the edges of the leaves are bent and spots similar to lichen are formed. Most often, this ailment is caused by prolonged rains or excessive watering, when nitrogen is simply washed out of the upper nutrient layer to the depth where it becomes inaccessible to the roots.
Onions turn yellow from a lack of nitrogen - how to water?
The only way to cure plants is to apply nitrogen fertilizers. But this must be done smartly and dosed, since active vegetative processes begin from excessive nitrate nutrition - an increase in green mass to the detriment of head formation. Fertilizer is prepared from plant components:
- green grass;
- hay, straw;
- any weeds, it is possible with seeds;
- food waste plant origin- vegetable peelings, sunflower husks, tea and coffee grounds.
Water is poured into the barrel (basin, bucket), preferably rainwater, everything that was collected on the site and in the kitchen is thrown. We also add sweets here - old candied jam, crystallized honey, sour fortified wine, expired condensed milk, or at least a couple of tablespoons of sugar. We stir this mixture well and defend until active fermentation, which we learn from bad smell. In hot weather, the solution will be ready in 3-4 days, in cool weather - in 2 weeks. We dilute 1 liter of nitrogen compote in a bucket of water and generously fertilize the beds with onions. It is better to do this after or during rain on damp ground. If the weather is dry, then the garden must first be watered. This top dressing is absorbed easily and quickly, supplying plants not only with nitrogen, but also with a host of other useful components. The most important components herbal infusions are nettle, plantain and dandelion. This is a real storehouse of trace elements that stimulate growth, increase plant resistance to fungal diseases.
Onion pests
The main enemies of the onion culture are the stem nematode, the onion fly and the secretive trunk. It is extremely difficult to see them on a plant due to small size and inconspicuous color. They can get into the garden with seed, fly in and crawl from neighbors and spend the winter in the beds in the remains of last year's crop. characteristic distinguishing feature residence of unauthorized persons on the bow - the feather turns yellow not at the tips, but along the entire length.
Yellowing from pests - what to water?
Folk remedies for onion flies and secretive trunks are saline and all the bitter sprays that exist in nature. Tinctures of tobacco, pepper, mustard, garlic are prepared for 3-4 days, the concentration - the more the better. If the onion has already turned yellow and there is little time for cooking, you need to throw all the additives into the water and bring it to a boil. After cooling under the lid, you can immediately start spraying. For a nematode, a bitter soul is not enough and the remaining liquid is poured out between the rows of onions. From a fly, there is another proven remedy - insist the skins of green nuts in water for at least a day and generously shed the area with this solution.
Salt solution can be used both for prevention and for destruction. 10 tablespoons in a bucket of water, mix well and pour over the plants and under the root. If this does not help, you need to resort to heavy artillery - ammonia. The bottle is dissolved in a bucket of water, applied with a sprayer over the feather. As a result of processing, burns remain, but pests disappear. Unfortunately, if a massive raid has been made on your garden, folk remedies may be powerless.
Fungal diseases and control methods
Yellow onion feathers can talk about another fungal disease - bottom rot. You can find it by pulling out one plant and examining its spine. In the stage of development of the disease, a light white coating, and if the fungus rampages on the site, 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 onion should be planted as far as possible from this zone. Do not use seed from an infected crop, but before new fit process the sevok in a weak solution of potassium permanganate or alcohol. Water the bed moderately, arrange drainage or drain excess rainwater.
What to do so that the onion never turns yellow?
There are a number of proven, biologically based methods that will help you grow large, healthy onions without much difficulty.
- Every year, change the planting site of all crops, including onions. This will not save you from weather disasters, but from a shortage useful substances in the soil and from wintering pests, this measure is very effective.
- Apply on site mixed landings. Onions and carrots are proven neighbors that protect each other from pests. Onions planted around currants are also protected from insects by the tart smell of the bush. The plant feels good in strawberries and next to basil, and peas, which are able to draw nitrogen from the deep layers of the soil, abundantly supply growing onion heads with it.
- Mulching the entire free land between onions dry and green grass, which also has its own smell and confuses pests. In addition, the yellowing of onion feathers sometimes causes the bear to walk near the roots. But this pest does not tolerate shady areas, and vegetable mulch creates a permanent shady and wet effect. When temperatures change, the organic carpet keeps the onion beds from freezing or drying out.
Onions dry in July - what to do?
By mid-July, the onion should lie down and dry completely. It's harvest time. The last two weeks, watering completely stops. If weather forecasters predict rains, it is necessary to have time to collect and dry the crop before the moment of precipitation. Having pulled the heads out of the ground, it is advisable to leave them in the garden for another 2-3 days. In case of high humidity, lay in a well-ventilated area, loosely pressing against each other in one layer. After complete drying, cut off the roots with scissors without damaging the bottom, and leave the top 3-5 cm. In this form, the crop can be stored for storage.
Valentin, Kursk. Hello, tell me what to do if onions turn yellow in the greenhouse? What could be the reasons?
Growing onions in a greenhouse is an opportunity to get fresh vitamin greens all year round. At the same time, often, vegetable growers are faced with the problem of yellowing onions. Help to deal with the problem people's councils and identification true reasons yellowing.
Why green onions turn yellow
There are several main reasons for early yellowing of onions:
1. Soil quality. Lack of nitrogen in the soil provokes earlier yellowing of green onion feathers. The use of a nutrient substrate for its cultivation and the timely application of fertilizers will prevent yellowing. If this has already happened, onion beds should be fed with nitrogen-containing mineral or organic fertilizers: ammonium nitrate, ammonium sulfate, urea, bird droppings solution, rotted manure.
2. Violation of irrigation conditions. During the period of intensive growth of green mass, onions require abundant watering, since the lack of moisture in the soil causes yellowing of the onion feather. Sufficient watering and mulching of plantings will provide the necessary level of moisture.
3. fungal diseases. The most common diseases affecting green onion relate:
- rust. It is manifested by the appearance of yellow convex spots, which blacken over time. As a result, onion feathers dry and fall off.
- Donets rot or Fusarium. The development of the disease is promoted by elevated soil temperature. Fusarium manifests itself in the form of yellowing and then drying feathers, rotting of the root system.
To prevent the development of rust will help compliance with the conditions of crop rotation in the greenhouse, preliminary 12-hour warming planting material at t ° 30-40 ° C and preventive spraying with the Hom fungicide or copper oxychloride: 1 table. spoon + 1 table. a spoonful of soap + for 10 liters of water.
Compliance with the rules of crop rotation and growing conditions, high-quality storage and rejection of planting material, the use resistant varieties are the main measures for the prevention of fusarium.
4. Damage by pests: stem nematode, onion fly, tobacco thrips, onion secretive proboscis, onion moth.
- The onion secretive hunter can be overcome if you use the following folk method. Remove all onion feathers damaged by the insect, and pour the bulbs themselves with salt-manganese infusion - 1 cup of salt, a little potassium permanganate, 10 liters of water.
- To prevent the appearance of an onion fly, watering the onion with a solution of ammonia will help: for 10 liters of water - 3 tables. spoons. Before and after treatment with a solution of ammonia, the onion should be watered. 14 days after the first preventive treatment, pour onion planting with saline solution - 10 table. spoons per 10 liters of water. Before and after processing, the onion must be watered clean water. After another 10 days, planting onions in the same way is watered with a pink solution of potassium permanganate.
- The treatment of plantings with a two-day infusion of tobacco will help to cope with the onion fly - for 10 liters of water - 400 g of crushed tobacco leaf or dust, boil the infusion for 2 hours and cool before processing.
- Treatment of plants with saline solution with the addition of ammonia (1 glass of salt, 2 tablespoons) will help to cope with onion fly larvae. ammonia, 10 liters of water). Pour the bulbs with this solution, avoiding contact with feathers and loose soil.
- Several bushes of marigolds and calendula planted in the aisles of the onion will scare away the stem nematode and tobacco thrips from the onion.
- Watering and spraying the plants with a solution of metronidazole - 250 mg (4 tablets) per 10 liters of water will help get rid of insects that infect the onion and lead to its yellowing.
- Adding drunk tea leaves when planting onions promotes the growth of strong and disease-resistant plants.
- The onion will grow strong if you feed it with a yeast infusion aged for 1 hour: 10 g per 1 liter of water.
Strict observance of crop rotation, rules of watering and top dressing, ensuring optimal temperature and humidity in the greenhouse, the use of high-quality seed, its preventive treatment before planting will allow you to get a plentiful and high-quality crop of green onions. And in the event of a disease or pest damage, proven folk methods will help to cope with the problem.
Why does the onion turn yellow - video
Helping Onion Feathers Become Green Again!
Can you imagine a kitchen without onions? Even despite the fact that tears flow like a river from onions, we cannot do without it. It is for this reason that you will not find summer cottages, which would not have this vegetable. Onions are planted, as a rule, either in winter or in spring. Growing it is quite easy. He is practically not capricious and shows discontent quite rarely. The main signal of serious problems serves as yellowing of feathers. In this article, we will talk about the causes of yellowing of onion feathers and how to deal with it.
So, what to do if the feathers turn yellow? First of all, we pay attention to when this happens. Onions turn yellow in June - a bad thing. This means that the plant is missing something or a pest has started up on the site. If the onion turns yellow at the end of July, it's okay. So our harvest is ripening and we will soon harvest it. So, the yellowness of onion feathers can be provoked by:
- pests;
- lack of nitrogen in the soil;
- lack of moisture.
Measures to combat the yellowness of the pen will depend on the specific cause.
Onion pests
Most often, onions are affected by the onion fly and secretive proboscis. When affected by an onion fly, onion feathers turn yellow and wither ahead of time, and a larva can be found in the bulb itself. This leads to rotting of the vegetable. Bulbs are effortlessly pulled out of the ground even when weeding.
Onion fly protection measures
- the soil should be dug deep before planting;
- early sowing;
- we plant an onion next to a carrot, its smell will scare away a fly;
- immediate disposal of affected plants;
- sprinkle the ground around the onion beds with ashes;
- thorough cleaning of plant residues;
Symptoms of damage to the onion secretive trunk
- the appearance of whitish spots and longitudinal stripes on the feather;
- yellowed tips;
- twisted and dried feathers.
For a young onion, both adult beetles and their larvae are dangerous.
Protection measures against the onion secretive hunter
- immediate cleaning of plant residues;
- we plant a beam away from last year's beds;
- do not forget to regularly loosen the aisles;
- remove the affected feathers and be sure to loosen the soil.
Lack of nitrogen in the soil
This problem can occur both in rainy weather and in dry weather conditions. Moisture is needed to absorb nitrogen. On the other hand, in conditions of heavy rainfall, nitrogen compounds descend too deep into the ground and plant roots are not able to extract them.
What to do? To compensate for the lack of nitrogen, onions should be periodically fertilized with saltpeter, urea or manure.
lack of moisture
At a time when the onion is actively growing and developing, it needs regular watering.
- onions should be watered before and after weeding;
- water should be poured into prepared grooves between plants;
- if the plantings are dense, we use a watering can for watering to avoid washing out the soil around the bulbs;
- check the need for watering with a finger. If the soil is dry at the depth of the nail, then the onion should be watered immediately;
- a month before the expected onion harvest, we stop watering.
Saving onion feathers
We bring to your attention several folk ways to deal with several problems at once.
- In 10 liters of water, dissolve 1/2 cup of kitchen salt and 1 ampoule of ammonia. Add 3 good handfuls of ash. Water with this solution every ten days. Continue the course until the feathers turn green again.
- Seeds for planting should first be soaked in a strong solution of potassium permanganate and planted in rows, which are abundantly sprinkled with salt.
- Make a solution. Take 1/2 tablespoon of iodine, 0.5 kilograms of soda, 2 sachets of manganese and dissolve in five liters of water. The result is a highly concentrated solution, which must be diluted with water in a ratio of 1:10. Now you can water.
- Sprinkle the aisles with sand, which is pre-mixed with naphthalene.
- Water the onion with salted water with manganese.
