Prevention and control of buckwheat hookworm

The buckwheat (Hymenoptera: Lepidoptera) is a Lepidoptera (Hymenoptera) family with a length of 10-13 mm and a wingspan of 30-36 mm. The forewings have 3 outwardly curved ">" yellow-brown lines. The larvae are 20-30 mm in length and the young larvae are green or gray-brown. The larvae gradually turn dark brown as they age, and the mature larvae appear as white. The worm is mainly a larvae that damages buckwheat and has gluttonousness. When it is severe, its output is reduced by more than 50%, and even results in an unacceptable harvest. The recent temperature and humidity conditions are very conducive to the occurrence of buckwheat Hookworm, and growers need to actively carry out investigation and prevention.

Prevention

1. Artificial killing uses the larvae to be deadly and can be killed manually. The method is to hold a sieve in one hand, beat the buckwheat plants in one hand, and let them fall on the sieve to eliminate them.

2. Chemical control Before the third instar larvae, spraying with 800-1000 times of BT powder, 2000-2500 times of 4.5% beta-cypermethrin, or 1500-2000 times of 20% chlorimuron EC can be used for spray control.

Safety Precautions

When using chemicals, the dosage must be in accordance with the instructions, to prevent excessive dose caused by phytotoxicity (buckwheat in the flowering period, poor drug resistance), spray clothing, wearing glasses and gloves, while setting up a spray logo To prevent human and livestock poisoning incidents.