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Small tigers pose a great threat to vegetables, spring corn and cotton, and they are prone to lack of seedlings and ridges. They should do a good job of prevention and control. In the middle and late April of the second instar period, the second instar larvae of small tigers were sprayed with 2.5% lambda-cyhalothrin emulsion or 2.5% deltamethrin cream 1000 times; or 90% crystal enemy per acre. 100 kg of bacon 250 kg mixed grass made of baits, in the evening appendage. When spraying, all the ground, especially weeds, crop residues and fallen leaves should be sprayed to ensure the control effect.