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苏云金杆菌(Bacillus thuringiensis)是一种昆虫病原细菌,它能产生一种结晶体。这种物质含有一种对多种昆虫具有毒性的蛋白质。现已分离到苏云金杆菌的许多小种,并根据其鞭毛抗原大约分为20个亚种。其中由 de Barjac 等在巴基斯坦分离的 Pakistani亚种产生一种双棱锥状的结晶体。对苹果小卷蛾(Carpocapsa pomonella)、棉红铃虫(Pectinophora gossypiella)和大菜粉
Bacillus thuringiensis is an entomopathogenic bacterium that produces a crystal. This substance contains a protein that is toxic to many insects. Many races of Bacillus thuringiensis have been isolated and divided into 20 subspecies based on their flagellar antigens. Among them, the Pakistani subspecies isolated in Pakistan by de Barjac produces a double-pyramid-like crystal. Carpocapsa pomonella, Pectinophora gossypiella,