以往的苏云金杆菌无论是粉剂还是乳剂,都是用于叶面喷洒来防治害虫,而将BT乳剂混在底肥中基施种白菜,使之整个生长期不受害虫为害还是一个新方法。 1992年由于我家中无粪肥种菜,就将我厂生产BT乳剂的废渣经发酵后施于菜地里。在白菜生长期间,别人家的白菜生蚜虫、菜青虫不能食用时,却发现我家的白菜长势旺盛且无任何虫害。 Bacillus thuringiensis in the past, whether powder or emulsion, are used for foliar spray to control pests, and the BT emulsion in the base fertilizer mixed with cabbage, so that the entire growth period from pest damage or a new method. In 1992, due to the absence of manure in my house, the waste residue of BT emulsion produced by our factory was applied to the vegetable fields after fermentation. During the growth of cabbage, other people’s cabbage aphids, cabbage can not eat cabbage, but found that my cabbage growing strong and without any pests.