蔬菜作物生了虫,绝大多数农户是喷施农药,其效果固然较好,但也会留下些残留物,产生污染,而且成本高。现介绍一种简便易行的生物灭虫法。具体方法是:从田间捕捉或收捡僵死的菜青虫等害虫100克,捣碎让其腐烂,加水20毫升;浸泡24小时后,滤出液体,再兑水50公斤,加入洗衣粉50克。将此液体喷洒在 Vegetables and crops have been born insects, the vast majority of farmers spraying pesticides, although its effect is better, but also leave some residue, resulting in pollution, but also high cost. Now introduced a simple and easy way of biological pest control. The specific method is: catch or pick up from the field Zipei cabbage pests and other pests 100 grams, crushed to let rot, add water 20 ml; soak for 24 hours, filtered liquid, and then watered 50 kg, 50 grams of washing powder. Spray the liquid on it