How to prevent and control armyworm in high temperature and rainy weather

How to prevent and control armyworms in high temperature and rainy weather? Recently, affected by high temperature weather, corn worms have been harmed by corn worms. Corn worm larvae overeat corn leaves. When the disease is serious, they will eat light leaves in a short period of time, resulting in reduced yield or even no harvest. Low, corn plants with uneven heights and weedy fields are seriously damaged.

In the corn field, before the larva 3 years old, kill 20-45 g/mu of pyrethroid emulsifiable concentrate, spray 50 kg of water, or use 5% to remove 1000-1500 times of liquid, 40% of oxidized dimethoate 1500-2000 times. Liquid or 10% Dagong 2000-250 times liquid spray control, the young larva stage to kill juvenile 1-3, 200PPM to control the armyworm larvae efficacy of 94.5% or more, and does not kill natural enemies, the crop safety, the amount is not polluted environment

The application time should be before 9:00 am or after 5 pm on sunny days. If it is rainy, it should be replenished in time. It is required to spray evenly and thoughtfully, and the weeds on the roadside should be sprayed. When the age of the insect is large, it is necessary to increase the dosage. For a field with a particularly large amount of insects, the plant can be beaten first to shake off the sticky insects on the ground, and then sprayed on the ground. It can receive good results. Wear protective clothing and wear a mask when spraying.

In the process of prevention and control of corn armyworms, it is necessary to timely grasp the information on the monitoring and monitoring of insects released by the local plant protection department, so as to achieve early detection and early prevention and control, and try to control the corn armyworms before the third age. The prevention time is generally selected from the high-risk time of larvae feeding in the morning and evening; the spraying part is applied as much as possible in the corn heart.

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