Occurrence and Control of Cotton Red Spider

Cotton red spider, also known as cotton leafhopper, is a kind of harmful pest that damages cotton. It mainly sucks juice on the back of cotton leaves. In the early stage of damage, more white spots appear on the front surface of the leaves, red spots at the petioles after a few days, and the leaves are dry and fall off when the leaves are heavy. The cotton plants are dead and burn like a fire, resulting in a large area of ​​reduced production, and even no harvest.

The occurrence of regular crops at the relative humidity of the cotton field at 35% to 55% is more likely to occur. It is more serious in drought years.

Prevention and control methods When a small amount of cotton fields occur when the highlights prevention. A spray was found and a spot was sprayed to prevent its spread. When the diseased strain rate reaches 10%, chemical control should be carried out. Can be sprayed with 800-1000 times of dicofol emulsifiable concentrate (this medicine is forbidden to use on tea tree). It is best to prevent it from 8 to 11 am and spray it on the back of the blade.

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