Bt制剂是一种无公害微生物农药,对菜青虫、甜菜夜蛾、棉铃虫、小菜蛾等有良好的防治效果。该制剂不宜久存,且土法制菌技术简便,活孢子含量高,成本低,适合一家一户自配自用。为此,本站经过两年试验,用薄层发酵技术试制Bt制剂获得成功。其制菌技术如下: 原料及配方 Bt preparation is a kind of pollution-free microbial pesticide which has good control effects on cabbage worm, beet armyworm, cotton bollworm and diamondback moth. The preparation is not suitable for a long time, and the indigenous bacteria has the advantages of simple technique, high living spore content and low cost, and is suitable for self-use of a household. To this end, the site after two years of testing, thin layer fermentation technology trial Bt preparation success. The bacteria technology is as follows: raw materials and formulations