The plant protection principle of Momordica charantia L. is: according to the plant protection policy of "prevention first, comprehensive control", adhere to the pollution-free control principle of "agricultural control, physical control and biological control first, supplemented by chemical control". Pesticides with high toxicity, high residue, high biological enrichment and high toxicity (teratogenic, carcinogenic and mutagenic) and their mixed pesticides prohibited by the state shall not be used. Pesticide application should strictly implement the provisions of GB4285 and GB/T832 1.