Agricultural control 1 Combine the accumulation of fertilizers to concentrate the dried leaves, stubble and weeds in the fields, or kill them, eliminate the hidden larvae and larvae, and 2) Infuse, submerge, and plow before harvesting or sowing, physical and mechanical Kill larvae and pupa eggs, etc. to reduce the source of insects; 3 before and after hatching butterfly, artificially kill maggots and larvae, trapping insects with insect nets before the oviposition.
Biological control 1 Protect spiders, ladybugs, and other natural enemies, and artificially release pink butterfly wasps, use as little or no pesticides as possible, especially broad-spectrum insecticides; 2 before larvae 2 years old, available 20% full or 25% Youngurea No. 3 1000 to 2000 times, or Bt500 to 1000 times, or 1% of the insecticidal cream 2000 to 2500 times, or 0.6% exterminal EC 1000 to 1500 times the spray; 3 with 0.2% Green body aqueous solution control. 100 grams of cabbage worms were picked per acre, crushed, 250 ml of water, 50 g of detergent, and 50 kg of water spray.
Plant source control 1 In the peak of egg hatching, use 50% bitter root bark powder, wrapped with gauze, shake on the vegetable strain, mu 1.5 kg; 2 to 1% to 3% lime water or 1% ~ 3% superphosphate soaking spray.
Low toxicity chemical pesticides should be applied before the second instar. Optional 90% Trichlorfon, 5% Hundred Tree or 48% Loxen 1000x, 45% Green Pepsi 1000-1500x, 2.5% Vegetable HX 1000-1500x, 5% Frigid Suspension 2500 times, 10% Divided 2000 ~ 2500 times the suspension agent, 24% Suspension 2000 ~ 2500 times, 40% of the new Nongbao EC 1000 times, 3.5% Ruidan EC 800 ~ 1500 times, 20% sedek suspension 2000 times, 2.0% chlorinated emulsifiable concentrate 3000 times, 50% phoxim 1000 times, and 5% Sodium Chloride 1500 times spray control. Note: In the morning or evening, the leaves should be evenly sprayed on the front of the leaves of the plants and the relevant agents should be used alternately.
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