How to deal with peanut damage caused by green insects in peanuts?

Peanut caterpillar occurs in a large area in northern China. Henan is especially important, can be infected for 5-6 generations, generally 1-2 generations of relatively simple control. After that, the insect showed strong resistance to pesticides, and the control effect of single pesticides on it was not ideal. Larvae mainly feed on new leaves and buds of peanuts. Adults not only nibble on leaves, but also nibble on flowers. Peanut leaves are very important for later yield of peanuts. However, if the leaves are bitten by green insects, there will be gaps. In severe cases, only peanuts are left. After the leaves fall off, the plants cannot carry out photosynthesis, which will seriously affect the yield.

So how to treat peanut worms?

First of all, the occurrence of pests is not a single occurrence, but a variety of pests, such as hanging insects, diagonal night moths, cotton bollworm beet night moths and so on. As can be seen from the picture, this green insect should be the larva of "beet night moth". Prevention should be given priority to this insect, and management should be carried out when the insect is found. The insect has caused irreparable harm to peanut leaves. When moths are found in the field, medicine should be applied. spray 20% chlorantraniliprole 3000 times solution evenly on peanut leaf, and spraying 1.8% abamectin emulsion diluted 2000-3000 times + imidacloprid (4000 times) or 50% phoxim emulsifiable concentrate dilute 1000 times.

Secondly, when pesticide is applied, it is necessary to pay attention to the spraying time. The weather is hot now. During the day, green insects hide on the back of leaves. Therefore, the spraying time is before 8 a.m. or after 6 p.m., and the compound of beta-cypermethrin + chlorantraniliprole + avermectin is selected. The control effect is better.

Finally, there is an effective method for the control of peanut larvae, that is, biological control. In the peak spawning period of peanut larvae, Trichogramma is released 2-4 times, 20,000 each time. When the larvae lay eggs, they will release a signal. Trichogramma can quickly find fresh pest eggs through this signal, and then lay eggs and reproduce there.

Trichogramma from egg to larva to pupa, are completed in the green worm egg shell, so that once the Trichogramma mature, will break out of the green worm egg, through the destruction of other pest eggs to reproduce themselves, using Trichogramma is cost-saving, but also relatively safe.

All of the above is the occurrence of pests, found pests, and then to spray, then if fundamentally eliminate it? The first is deep ploughing and winter irrigation to kill overwintering pupae. There is also the discovery of moths, not found before the green insects, with black light, trap moths, so that you can effectively reduce the number of eggs.

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