从田中捕捉菜青虫１０克 ,捣碎后让其腐烂 ,加水２０毫升 ,浸泡２４小时后 ,滤出虫液 ,再对水５０公斤 ,并加入洗衣粉５０克 ,然后将这种稀释液喷洒在发生菜青虫为害的蔬菜上 ,蔬菜上的菜青虫便会纷纷死去。因为害虫身上都带有病菌、病毒等病原体 ,死害虫体液喷洒到活虫身上后 10 grams of cabbage beetles were collected from Tanaka, and the mixture was allowed to decay after it was crushed. 20 ml of water was added. After soaking for 24 hours, the insect was filtered off, and then 50 kg of water was added to 50 g of washing powder. The diluted solution was sprayed on Occurred cabbage caterpillar damage vegetables, vegetable cabbage caterpillars will have died. Because the pests are infected with pathogens such as germs, viruses, dead insect body fluids sprayed onto live insects