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。如“BT杀虫剂”就是一种生物农药,以前叫苏云金杆菌杀虫剂。它可以杀很多种虫,在农业、林业、卫生等方面都有应用。它是一种胃毒剂,能产生一种特殊的酶,这种酶可以分解昆虫肠道当中的一种蛋白质,从而使害虫肠道穿孔,肠道里的东西流入体腔,最后得败血症死亡。显然,这需要有个过程,不象化学农药,能立刻 Biopesticides are pesticides made from microorganisms that kill pests. Such as “BT insecticide” is a biological pesticide, formerly Bacillus thuringiensis insecticide. It can kill a lot of insects, in agriculture, forestry, health and other applications. It is a stomach poison that produces a special enzyme that breaks down a protein in the insect’s intestine, allowing the insect’s intestine to perforate, allowing the intestines to flow into the body cavity and eventually die of sepsis. Obviously, this requires a process, unlike chemical pesticides, can be immediately