This is a major pest in the production of cowpea in the summer and autumn. It attacks the flowers and buds mainly by larvae, causing flowers to fall and feeding into the young grains and soybean meal. In the early stage of feeding, it causes desalination. In the late stage of feeding, pods produce pods, and the inside and outside of the pods cause excrement and cause rot. In addition, larvae feed on leaf and leaf wounds.
The bean pods are hi-temperature and high-humidity, and the adults are nocturnal and have weak phototaxis. Spawning eggs, occasionally 4 to 5 tablets together, prolific in buds, petals, loquat leaves and receptacles, a small number produced in tender stems, tender palate and petiole. The larvae have 5th instar, the newly hatched larvae enter the tender larvae or flower buds to feed. The 3rd instar larvae enter the larvae and damage the beans. The 2nd to 3rd instar larvae can damage the larvae in the morning and evening. Larvae have the habit of killing each other, one larva per pupa and a few 2-3.
To prevent bean sprouts, flower buds should be promptly removed and brought out of the vegetable field to be destroyed. When the bean sprouts buds 10%, 50%, and 80% respectively, they are sprayed and treated in the early evening, and the buds, flowers, tender flowers and flowers are sprayed. Can choose to use DuPont Pu Zun 5% chlorantraniliprole suspension 1500 times, hit 15% Indox Wei suspension agent 4000 times, dilute 10% pestonitrile emulsion 1000 times and other spray. Pay attention to pesticide safety intervals, and do not use drugs 5 days before listing.
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