How to control rice armyworm
Rice armyworm, also known as oriental armyworm, commonly known as razor worm, armyworm, and five-colored armyworm, is one of the main insect pests in rice field management. In rice fields, rice is generally damaged from June to July.
Mythimna separata mainly uses larvae to feed rice leaves, causing damage, with nocturnal nights and clustering hazards. Newly hatched larvae hide in the heart of rice plants, and the leaf sheaths eat the mesophyll, leaving some slender strips of thin films on the victim's leaves. The food intake of 2-3 instar larvae increased, and the leaves were bitten into holes; the food intake of 5-10 year old larvae surged and the leaves were eaten, leaving only leaf veins, stems, and armyworm outbreaks, causing severe insect damage. Therefore, the control of armyworm should be controlled in 2-3 larvae. And we must adopt the prevention and control methods of unified defense and have a good effect.
Control agent and ratio: First, use 90% trichlorfon crystal per acre to spray 100 pounds of water to 100 pounds per acre; second, use 80% dichlorvos per acre to spray 100 pounds of dichlorvos to 100 pounds of water; 3 is to use 50% Phoxim EC 1000 times spray control; four with 2.5% deltamethrin 1000-1500 times spray control.
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