生物农药就是利用对害虫有杀灭作用的微生物制成的农药制剂。目前生产规模最大、应用最广的品种为BT杀虫剂,也叫苏云金杆菌杀虫剂。和化学农药相比,生物农药具有以下优点:无残留、无公害、无毒或低毒、与环境相容、特异性强,即专一的作用于靶标有害生物、对人畜及天敌无副作用、不易产生抗性等。生物农药具有化学农药众多无可比拟的优点,但市场发展、推广进度缓慢,这主要由于:①生物农药以活体微生物为有效成分,故产品稳定性较差,品质得不到保证。②由于生物农药杀虫、杀菌 Biopesticide is the use of pesticides on the killing of pests of microorganisms made of pesticide formulations. At present the largest production scale, the most widely used varieties of BT insecticide, also known as Bacillus thuringiensis pesticides. Compared with chemical pesticides, biological pesticides have the following advantages: no residue, pollution-free, non-toxic or low toxicity, compatible with the environment, specific, that is specific to target pests, no side effects on humans and animals and natural enemies, Not easy to produce resistance and so on. Bio-pesticides have many unparalleled advantages of chemical pesticides, but the market development, promotion of slow progress, mainly due to: ① bio-pesticides to live microorganisms as an active ingredient, so the product stability is poor, the quality can not be guaranteed. ② due to biological pesticides insecticide, sterilization