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苏云金杆菌具有多种杀虫的毒素,基本上可分两类:一类为内毒素,即伴孢晶体毒素;一类为外毒素,主要是β-外毒素。β-外毒素对蚊蝇幼虫有明显的毒杀作用。在卫生防疫事业蓬勃发展的今天,开展β-外毒素的研究对除四害有一定的意义。为此,我们开展了有关β-外毒素的实验研究。 苏云金杆菌包括17个变种,分属12个血清型。本文报告的是苏云金杯菌血清型9菌株产生外毒素的情况及对家蝇幼虫的毒效观察。
Bacillus thuringiensis has a variety of insecticidal toxins, basically can be divided into two categories: one is endotoxin, that is, with the spore crystal toxins; one is exotoxin, mainly beta-exotoxin. β-exotoxin has obvious toxic effects on mosquito and fly larvae. In the vigorous development of health and epidemic prevention today, to carry out the β-exotoxin research in addition to four pests have some significance. To this end, we conducted an experimental study of β-exotoxin. Bacillus thuringiensis includes 17 varieties, belonging to 12 serotypes. This article reports the production of exotoxin from the S. thuringiensis serotype 9 strain and its toxic effects on housefly larvae.