Bacillus thuringiensis or polyhedrosis virus insecticides, emamectin benzoate, tebufenozide or avermectin difluoride or monosultap, florfenicol or indoxacarb or Sinochem 9080 can be selected for control. Recommended formula: Bacillus thuringiensis from big companies or emamectin benzoate+Sinochem 9080+ silica gel spray for 2-3 times, with an interval of 5-7 days each time!
Gray mold. It can be sprayed alternately with procymidone or propiconazole or pyrimethanil or tetracycline, and better foliar fertilizer can be added to promote the absorption of chemicals and increase the photosynthesis of leaves.