Chemical control of small heart borer in pear

Sex attractant can be hung in the orchard, check the number of trapping insects every day, generally 15 mu of orchard can hang 1. When the number of trapped adults increases sharply, the eggs and fruits are checked every 3 days. When the egg-fruit rate reaches 0.5%-1%, chemical control can be carried out. The main agents are: 1, 20% diflubenzuron suspension or 25% diflubenzuron wettable powder 3000 / 4000 times. 2. Weiyuan Hean (1% methylaminoavermectin benzoate) 3000 times liquid or Weiyuan Green Garden (2.0% methylaminoavermectin benzoate) 4000 × 5000 times liquid or Weiyuan Hongjia (2.15% methylaminoavermectin benzoate) 6000 × 8000 times + high chlorine 2000 times or high methylvitamin salt 3000 times. When the number of insect population is large, it is appropriate to spray once more at an interval of about 15 days, for 2 or 3 times in a row.