Control of buckwheat hook-wing moth

Buckwheat hook-wing moth belongs to Lepidoptera, Noctuidae, adults 10-13 mm long, wingspan 30-36 mm, forewings have 3 outward curved ">"-shaped yellow-brown lines. The length of the larvae is 20-30 mm. The young larvae are green or grayish brown. With the increase of the instar, the larvae gradually change to dark brown, and the mature larvae are dirty white. The insect mainly harms buckwheat larvae and is gluttonous. When it is serious, the yield is reduced by more than 50%, even resulting in no harvest. The recent temperature and humidity conditions are very conducive to the occurrence and damage of buckwheat hook-wing moth, so growers need to actively carry out investigation and control. Prevention and control measures 1. Artificial killing makes use of the false death of larvae and can be killed artificially. The method is to take a sieve in one hand, beat the buckwheat plant in the other, let it fall in the sieve and concentrate on killing it. 2. Chemical control before the 3rd instar of the larvae, spray control was carried out with BT powder 800-1000 times, 4.5% cypermethrin 2000-2500 times, or 20% methamphetamine EC 1500-2000 times. Safety precautions when using chemicals, the dose must be dispensed in accordance with the instructions to prevent excessive dose from causing drug damage (buckwheat is in flowering and drug resistance is poor), wear protective clothing, glasses and gloves when spraying, and at the same time set up spraying signs to prevent human and animal poisoning.