Armyworm is corn, millet, etc. in my area
A major pest on autumn crops
It has migratory and cluster nature
Omnivorous and overeating characteristics
It is easy to erupt into disasters in local areas
Serious losses to autumn crops
1-2 instar larvae only eat leaf flesh to form skylights or small holes
After 3 years of age, it forms a lack of moments, and after 4 years of age, it enters the period of binge eating
In severe cases, the crop is eaten into a light rod
This has resulted in serious production cuts and even a loss of harvest
According to a recent survey by the district plant protection station
Second-generation armyworms occur widely in corn fields in our region
The rate of harmful plants in general plots is 5%-20%
The average number of insects per 100 plants is about 5
Severe plot hazard plant rate 20%-40%
The number of insects per 100 plants is 10-30 heads
Most of them are currently 1-2 instar larvae
It is a critical period for prevention and control
It is the autumn crop seedling stage
It is also the peak of the second-generation armyworm hazard
The vast number of peasant households must act quickly
Set off a climax of the second generation of armyworm treatment
Strive to minimize its damage
Prevention and control methods:
Before the armyworm larvae are three years old, methylamino avermectin benzoate is optional. Fluolamide, methylaminoavermectin benzoate. High efficiency gas cypermethrin, methylaminoavermectin benzoate. Carbonitrile, chlorpyrifos benzamide. High efficiency cypermethrin, chlorhexenamide. Avermectin, fluorophenylamide. Agents such as methylamino avermectin benzoate are sprayed evenly with water according to the dosage required in the instructions. In a field with a large amount of insects, you can first slap the plant to shake the armyworm to the ground, and then spray the ground, which can receive good results.
Notes:
The time of prevention and treatment should be before 10 a.m. or after 4 p.m. It is necessary to pay attention to the safety of medication and prevent pesticide poisoning and herbicide damage.
Article source: Mengjin on the clouds