1. agricultural control: clear the fallen leaves in the field, dig deep into the land in time, and reduce the source of insects.

2. Biological control: 500 grams of Bt emulsion or Cordyceps sinensis is sprayed with 750 kilograms of water, and 0. 1% washing powder or a small amount of insecticide is added, which has a good effect.

3. Chemical control: 2.5% Dipyridamole EC 2000-3000 times, or 5% Laifuling EC, or 2.5% Kung Fu EC 2000-3000 times, or 25% Bisultap EC 500 times, or 5% Chlorpyrifos EC 2000 times, or 24% Wanling Emulsion 1000. Pay attention to alternate use, spray 1 time every 7- 15 days, first dense and then sparse.