It is advisable for every summer resident to know how to deal with an onion fly and prevent its attacks, because it is this pest that can cause serious damage to the crop, or even completely destroy it. It should be remembered that both green feathers and formed bulbs can be affected.
- What is an onion fly, what it looks like in the photo
- How to deal with an onion fly using chemicals, the use of phytoverm and phytosporin
- Fighting onion fly folk remedies
- How to use onion fly birch tar
- How to deal with pest larvae
- Effective prevention measures
What is an onion fly, what it looks like in the photo
The danger of this insect is that it does not harm as clearly as the Colorado beetles or aphids. After the fly, not a single gnawed leaf remains, they do not sip on bunches of onions.
It is mainly the larvae that are harmful, and it is quite difficult to notice them with the naked eye, examining the plant itself.
Outwardly, an onion fly can be recognized by its gray-yellow body shade and a pair of transparent wings with a bronze tint. In high-quality photos, with sufficient magnification, you can distinguish the black legs of the insect and a large number of black bristles on the back.
However, it is quite difficult to identify the onion fly among a number of Diptera for a person who does not understand this.
Unless you can look for it in the spring on cherry and dandelion flowers, recognizing by color and size, it is slightly smaller than a house fly.
It is noteworthy that larvae attack onions, while adult insects (adults) feed on sweet nectars of stone fruit and aster flowers. Females flock to onions only to lay eggs from which larvae will subsequently develop, which harm the plants.
The choice of plants for laying eggs may seem odd, as onions have strong antioxidant and antiseptic properties that can kill viruses and bacteria. However, the components of the bulbs are not able to cope with the larvae of pests, they are not able to cope with the attacks of parasites.
Let's watch a useful video about a pest and find out how to deal with an onion fly:
How to deal with an onion fly using chemicals, the use of Fitoverm and Fitosporin
Since parasites have been pestering gardeners for several years now, it is not surprising that the modern market can offer a huge amount of insecticides to combat them.
The most common chemicals that can be used to control onion flies are two.
Fitoverm is an insecticide that affects the digestive system of the pest. Fitoverm causes paralysis, as a result of which insects simply die from lack of food. However, with all the benefits of this drug, it does not work on eggs. To get the effect, the treatment of plants must be carried out systematically.
The result can be seen within six hours after the first spraying, and the massive death of parasites is observed the next day.
Fitosporin is a fairly effective drug that can be purchased in specialized stores. For processing, it is necessary to dissolve 35 g of the drug in 10 liters of water and soak in the resulting mixture for half an hour. It is not necessary to rinse after processing.
When handling, it is important to remember that any chemical can be hazardous to human health if used incorrectly. Therefore, it is recommended to carry out processing according to all the rules.
Fighting onion fly folk remedies
However, insecticides are not the only ones used to control parasites.
Among folk remedies, there are also many recipes for pest control, the most common are those indicated in the table.
|Ash||It can be used both for simple sprinkling of the beds, and for watering. The treatment mixture is two glasses of ash with ten liters of water. Process the aisles with the resulting mixture every two weeks;|
|Ammonia||In ten liters of water, it is necessary to dilute 50 ml of alcohol and treat the aisles after germination with the resulting mixture and repeat the treatment every month;|
|Table salt||The solution has a negative effect on the larvae, but it also negatively affects other representatives of the soil flora. In addition, such a solution leads to soil salinity, therefore, processing is recommended with caution.|
|Sagebrush||The pungent smell of this plant can scare away pests. To do this, you need to cut at least a kilogram of branches, finely chop and pour ten liters of water. Let it brew for several days, then filter and water the area abundantly. For prophylaxis, it is recommended to repeat the treatment once every two weeks from the moment of detection of the lesion;|
|Tobacco dust||Tobacco dust - can be used to sprinkle the area and the base for watering. Prepare a mixture from 250 g of dust and ten liters of water. Repeat the treatment every two days.|
Non-traditional means not only help to cope with insects, but also do not have a negative effect on the soil. This will help you get the most healthy and rewarding harvest possible.
How to use onion fly birch tar
Another effective remedy for insect control is a solution of birch tar. To prepare it, you need to mix 20 ml of tar and a bucket of water. The resulting mixture must be watered at the root of the onion.
The mixture is used to scare off parasites from the garden. In this case, it is important not to take too much tar, since it is a rather viscous substance.
How to deal with pest larvae
The most dangerous form of development of this pest for agricultural crops is precisely the larvae. Their danger is that they sneak under the husk and eat the onion from the inside.
In order to cope with them, you can use the following methods:
- Dilute 50 g of laundry soap in ten liters of heated water. Water the affected area with the resulting solution;
- You can sprinkle the soil with a mixture of equal amounts of naphthalene and fine sand;
- Dig up the beds after the crop is harvested. After that, the larvae will get out to the soil surface, where they will suffer from frost;
- Purchase a remedy for helminths at the pharmacy and dissolve 5 tablets in ten liters of water, then pour the resulting mixture once over the area.
A timely start of the fight will help prevent the spread of the larvae to other areas. If you don't pay attention to this, the larvae will hatch and give a new generation of pests that are capable of reproduction.
Let's watch an interesting video about methods of dealing with onion fly:
Effective prevention measures
The easiest way to deal with the problem is prevention.
The most effective ways to prevent injury include:
- Planting the onions near the carrots will help prevent infestation. The fly does not tolerate the smell of carrot tops, next to which it will not lay eggs;
- Use only high-quality planting material. So, if you buy a grid of onions in a store, you should not take one where sluggish or rotten seedlings are noticeable;
- Landing sites must be sprinkled with mulch from humus or rotted manure. This will help prevent females from accessing soil where they could lay eggs;
- Before proceeding with the direct planting, the seedlings must be soaked in warm water for five minutes or poured with a manganese solution for twenty minutes. Before direct disembarkation, they must be dried;
- When planting, it is important to observe crop rotation and it is recommended to plant onions after green manure forms, under which a sufficient amount of organic fertilizers has been applied.
Compliance with these simple rules will help to quickly and permanently scare away pests from the garden. The result will be a bountiful harvest without traces of damage and the danger of the spread of pests.
The onion fly is a fairly common parasite that can destroy crops.
In order to prevent the possible unpleasant consequences of a pest attack, you can use insecticides or folk remedies.