How to control wheat larvae

How to control wheat larvae
The wheat larvae is a devastating pest on wheat. It stalks the larvae in the wheat hulls and sucks the granules of the granules that are being grouted or damages the flowers, causing the granules and empty shells, and the yield is reduced by 20%-50%. 60%-90%, even the particles are not.
1, the characteristics of the disease.
The occurrence of larvae is mostly one generation a year. In the case of larvae with bad environment, it has many years of dormancy, so it has been produced for many generations. The mature larvae are rounded in the soil for wintering and summering. In the middle and upper reaches of the Huanghuai River Basin, the overwintering larvae in the middle of March rose to the soil surface. At this time, the wheat was mostly in the jointing stage, and in the middle and late April, a large number of alfalfa were formed. The peak of the eel was in the late April to early May, after the adult appeared, The value of the wheat heading and flowering period, followed by a large number of eggs.
2. Prevention and treatment methods.
1 Agricultural control: Select wheat varieties with tightly-shaped panicles, long and dense hairs inside and outside, thick seed, and difficult to drain out. Carry out the rotation and avoid the insect source.
2 chemical control: the best control period is the flood season, generally 50% phoxim emulsifiable concentrate per acre or 40% methyl isoflavone emulsifiable concentrate 200-250 ml plus water 5 kg sprayed fine soil 25 kg, can also be used per acre 3% phoxim or 3% methyl isoflavone 3-5 kg ​​of fine soil 20-30 kg evenly spread, timely watering after sprinkling to improve control. In the adult stage, the treatment can also be carried out by using 50% phoxim emulsifiable concentrate of 50 ml per mu or 25 mg of fenvalerate emulsifiable concentrate per acre.

Zhuangao this site Author: Dong Li
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