Why does onion rot


Growing vegetables on your own site allows you to get high-quality and inexpensive products at the end of the season. But there are times when root crops become unusable in the garden or during storage. Why does the onion rot and what methods of dealing with this scourge exist? We’ll talk about this in our review.

  1. Main reasons
  2. Bacterial rot
  3. Cervical rot
  4. Fusarium <
  5. Onion fly
  6. Stem nematode
  7. Agricultural engineering <
  8. Watering <
  9. Preplanting preparation
  10. Storage

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Why does the bow rot in the garden

Main reasons

Favorite culture grows in every garden, so farmers pay a lot of attention healthy vegetable. But not always possible without n We grow ripe turnips. An already ripened crop disappears before harvesting or turns into mucus when stored.

What is the reason that onions can rot?

  1. Humidity. Excess fluid in recent weeks before digging negatively affects the general keeping quality. The water accumulated in the tissues provokes putrefactive processes.
  2. Diseases. Ignoring the rules of cultivation leads to the fact that infectious and fungal diseases in onions are activated.
  3. Parasites. There are a number of insects that are not afraid of a harsh aroma. Gluttonous larvae destroy root crops from the inside, which causes the formation of rot.

Before proceeding with treatment, it is important to identify the culprit of the problem. It is recommended to carefully examine the affected vegetable.The presence of pests or ailments never seems unnoticed.

Bacterial rot

If an alternation of healthy juicy and soft stinky scales is found in the section of the bulb, these are signs of a common fungal disease. When harvesting, such root crops practically do not differ from unaffected ones, but after 2-3 months the turnips begin to disappear.

Onions can rot on the vine, so it is not always possible to quickly detect signs of the disease. First, light spots-burns appear on the feathers in the center, and then cover the space to the neck. On such leaves there is no plaque characteristic of the fungus, but against the background of healthy leaves they look faded and drooping.

To ensure that the product decays, it is enough to sprinkle excessively or wet summer. By the time of harvest, the disease enters the sinuses of the greenery and the neck. Onion infection gradually spreads to the juicy layers. The disease increases the temperature in the root crops, as a result of which the product disappears completely.

Rotting of onions can be prevented if we remember the rules of crop rotation. You can’t plant a sharp vegetable in one place for more than 2 years in a row. There are still a number of prohibited and recommended predecessors.

To avoid rotting onions, you can’t leave the missing plant debris in the ground: they accumulate dangerous bacteria that do not die from frost. The affected area is treated with fungicides.

When the first signs of the disease appear, the beds of root crops are watered and sprayed with copper-based preparations. It is important to choose the right product and follow all instructions. You can not make a lot of nitrogen fertilizers.

Cervical rot

A highly specialized pathogen affects only turnips. A characteristic gray or white mold appears, which gradually destroys the tissue of the lateral parts and the bottom. The scales soften, become yellowish-pink. There is an unpleasant odor.

Why then does the onion rot? The main source of fungus is seed. Infected raw materials quickly spread throughout the bed, as a result of which the root infection is infected. Improper cultivation conditions and an excess of nitrogen also create ideal circumstances for the occurrence of the disease.

Cervical rot affects planting stock. To reduce losses, it is recommended to carefully select suppliers of sevka. Black bulbs should be well dried and have a tail length of 3 to 6 cm. Raw materials should be stored at a temperature of 1 to 5 ° C.

There are no resistant turnip varieties. So that the product does not rot, it is necessary to etch the seeds before planting. Use soaking in fungicides “Benlat” or “Tigam.”

Cervical rot affects not only the bed. Harvesting is carried out in the period of full maturity, having previously stopped watering 3-4 weeks before work.Injured bulbs cannot be stored with other root crops. Regular inspection of the products and the destruction of the missing specimens will protect against the spread of infection.


Donbot rot is a very dangerous disease that affects only this culture. It can occur during the period of active growth and during storage. Fungi become the cause of the occurrence.

Fusarium onion infection will occur in the form of yellow curved feathers that gradually die off. A light pink coating appears between the foliage. Turnips lag behind in growth, and the roots darken and dry out. In the section of affected vegetables, the lower part of the scales becomes watery, acquiring a gray color. Gradually, the product disappears.

Why then does the onion rot in the ground and in storage? Excessive irrigation and violation of cultivation conditions provoke the activation of the disease in the garden. Mechanical damage during harvesting and an unripened neck significantly reduce keeping quality.

A couple of days before planting, the soil is treated with boiling water. Immediately before planting, the beds are watered with a concentrated solution of manganese.

Fusarium onion infection does not appear in areas where farmers have treated the seeds and soil with fungicides. Prevent soil moisture and regularly loosen the soil. It is worth remembering crop rotation rules that reduce the chances of infection.

Onion fly

A highly specialized insect that feeds exclusively on sharp vegetables. Larvae mercilessly devour root crops, so inattentive gardeners can lose their entire crop. It is already impossible to save the affected turnip.

The onion rots in the ground due to the fact that the larvae bite into the juicy flesh. A characteristic feature of the destruction that has begun is the withering of the feathers. Culture is significantly suspended in development. Inside, under the upper scales, moving light worms are noticeable. The turnip produces an unpleasant aroma.

The reason why the onion rot in the garden becomes a nimble insect. It is easy to destroy the pest, but all chemicals accumulate in vegetables, making them dangerous to humans. Experts advise combating preventive measures. The insect begins active breeding in May, and during the season hatch up to 4 generations.

Careful digging of the site during the winter raises adult individuals and pupae to the surface. The onion fly does not tolerate low temperatures, so it dies with the first frosts. When planning beds, they prefer sunny, well-ventilated places. Carrots are sown nearby: its smell repels the pest.

What machining thief onions rot? Planting material soaked in insecticides, and then sprayed with “Aktar” mass seedlings in May and June. If signs of infection become noticeable, it is recommended to water the beds with saline: treating with dandelion or tobacco dust infusion repels insects.

Stem nematode

What causes the onion to rot on the vine? Small thin worm is a dangerous pest of culture. It hibernates in soil, in bulbs and in the infected seedlings. The insect has been in a dormant state for 2 years.Under favorable conditions, wakes up and destroys the crop.

The parasite penetrates into the plant through the stomata of the leaves and from the side of the bottom, lays eggs in the infected tissue. Adults and larvae feed on the sap of the head, molt several times.

Sick root crops lag behind in development. The cotyledon feather is swollen and unnaturally curved. When cut, the tissues have a loose structure, and the scales are unevenly thickened. When pressed, the turnip seems soft. The dug head is very wet and has a specific aroma. During storage, decay begins.

How to deal with the nematode? Compliance with crop rotation rules will minimize the chances of infection. Sevc is carefully selected or purchased from trusted sellers. Before planting, it is important to soak the raw materials in hot water – from 45 to 55 ° C.


Many beginners do not know why onions rot in the garden, in this case it is recommended get to know more about the features of growing crops. Plants love the abundance of sun and air, so they select the appropriate areas.

To get a healthy crop, it is not enough to get an elite variety. Onions can rot in the ground in violation of crop rotation rules: you can not plant a turnip every year in one place. Recommended predecessors:

  • potatoes;
  • tomatoes;
  • cabbage;
  • siderata.

Onions can rot if the beds are broken after:

  • garlic;
  • cucumbers;
  • carrots.

The last root crop can be planted near the turnip. Such a mutually beneficial neighborhood will protect both crops from specialized insects, additionally scare away dill and velvet parasites.


To avoid onion rot, it is important to choose the right irrigation regime. Excess moisture in the earth negatively affects the later stages of development. The root system cannot cope with the incoming fluid, so it starts the decomposition process.

Abundant watering is needed in the first weeks after planting. After a feather has appeared above the ground, it is necessary to switch to a less intensive irrigation. The procedure is recommended to be done as the soil dries.

The cause of rotting of the onion may be a lack of oxygen. After watering, a dense crust forms on the ground, which does not allow air to pass through. Under such conditions, the plot is unevenly dried and irreversible processes begin. So that the whole crop does not start to disappear, you need to regularly loosen the beds. Mulching will help to simplify the work.

Before you start digging, they stop watering the crop. The plant does not accumulate moisture in the tissues. This trick protects against the onset of decay and prolongs the shelf life of products.


In order to plant onions do not rot, we must not forget about preventive measures for planting: they will protect the material from possible problems in the future. The easiest will be soaking in potassium permanganate and salt.Substances relieve infection and insects, but do not have a prolonged result.

Rotting of onions in the garden can be triggered by fungi, so it is important to process the seeds. Copper sulfate is a very aggressive drug, but common ailments will not be saved from it. The procedure is supplemented by soaking in fertilizers.

Professional remedy “Fitosporin” is used to combat diseases: it protects against many onion ailments, which allows it to be used both on a personal plot and in a large agricultural company. The preparation showed the best results for processing as a preventative measure.


Another reason that the turnip rots is the incorrect preparation and maintenance of the crop. The bulb may be injured during harvesting. Microbes fall into the wound, which begin to destroy it from the inside. Such an element will become a source of infection of all products.

If a short neck is left on the turnip, then fungi penetrate through it into the middle. The recommended length is from 3 to 6 cm. Such a “tail” will become a reliable barrier to destruction.

Why else does the onion rot? It is important to rid the flakes of excess moisture. Before sending the crop for storage, it is necessary to dry it thoroughly. To do this, leave the products for several days under awnings or in a well-ventilated area.


We figured out why onions rot in the ground and during storage.These recommendations will help determine the problem, as well as tell you what to do so that the crop does not begin to disappear.

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Anna Evans

Author ✓ Farmer

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