Fight and avoid onion fly: This is how it works
The larvae of the onion fly can be particularly dangerous for your vegetable patch.We show you how to protect your plants from the fly and how you can fight them.
Onion fly: This is how you recognize them
The onion fly is part of the flower flying family and is anything but a welcome guest for hobby gardeners.Because in particular, the tiny larvae of the fly prefer to make different onion plants.If you want to avoid your garden of the onion fly, you should know what the pests look and live:
Adult onion fly
The adult onion fly is similar to a parlor fly on the outside and becomes up to seven millimeters long.Your light gray body is covered with dark hairs.The shield between her wing approaches is yellow.
As soon as the female fly has strengthened, she puts her eggs near young onion plants in the ground in May.
Up to three generations can be in your vegetable patch per year.
Onion fly larvae
About 14 days after laying eggs, the larvae of the onion fly slip out of the eggs and start eating the surrounding plants.A larva can even affect several plants.
The larvae are about one centimeter long, are head and bone and have a whitish body.
They hibernate in red -brown dolls that are a maximum of six millimeters long and are hidden in the ground.
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You can see this an infestation through the onion fly and its larvae:
Wilting young plants: Infested onion and wing plants take on a yellowish-gray color shortly after germinating and start to withdraw.You can also easily pull the sick plants out of the earth.
Cutting passages: You can often already see the feeding rides of the larvae on larger plants.There is usually a rotten smell of these.In addition, the small white maggots are often still in the corridors.
In addition to onions and leek, the onion fly also endangers planted chives and garlic.In rare cases, the larvae of the pest even affects tulips.
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Prevent an infestation from the onion fly
Once your plants have been infected by the larvae of the onion fly, larger crop failures usually do not long for long.Therefore, you should use preventive measures as early as possible to protect your garden from the pests:
Cultural protection networks: The easiest way to keep the onion fly with a vegetable protection network made of cotton is kept away from your plants.Cover all of your onion plants completely and completely with the close -knit networks.Make sure that you regularly loosen up the network so that it does not hinder the growing plants.It is best to cover your plants from the beginning of April to harvest with the networks to optimally protect them from the egg laying of the onion fly.
Promote predators: The natural enemies of the onion fly are spiders, running buyers and slippers.You can even buy these in garden trade or online - for example from Avocadostore **.In order to keep them in your garden and to attract other beneficials, you should manage your beds and lawns as close as possible and in a variety of ways.You can also build an insect hotel to offer the helpers shelter.
Remove rotten onions: If you discover rotten onions in your bed, you should always dispose of them as quickly as possible.So you offer the pest as few food sources as possible.
No strong fertilizers: Even if fresh manure is a good source of nutrients for your plants, you should better do without such strong -smelling fertilizers.Her smell often attracts the onion fly.Instead, care for your onion plants with self -made plant teas from wormwood or rain fern.
Mixed crops, crop rotation and change of fruit: Make sure that you insert the fruit change in your garden bed and that your onion plants never look for two years in a row in the same place.You can also stop the pest by adding onions in mixed cultures with other vegetables.For this, for example, you can sow carrots or plant parsley.Planted bush beans and cabbage varieties are also suitable for this.
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Fight on the onion fly gently
The later you discover the infestation through the onion fly, the more difficult it is to get rid of the pest.Various insecticides are available in stores, which the fly should quickly make the fly.However, these funds can also harm useful insects.So before you reach for the chemical club, you should first use biological spray and gentle measures to combat the onion fly:
Remove infested plants: If your vegetable patch is infected from the onion fly, you should first find all the withered plants and pull them out of the earth.Unfortunately, all help comes too late for them.So that the larvae cannot spread to the healthy residual stock, you should dispose of them as soon as possible.However, do not put them on the compost.Otherwise the pest will spread from there.Instead, you best place infested plants in household waste.
Biological spraying agents: Especially in early stages you can also fight the onion fly with bought or self-made organic preparations.You can make nettle yaes yourself.Set them for a maximum of two to three days to get a more odor -neutral broth for your onion plants, which has no influence on the taste of the later harvest.
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