苹果巢虫在省内果园普遍发生,连年危害,严重的影响果树产量。巢虫危害期也正是果树开花盛期,不能使用化学农药,所以急需筛选出一种对花无害的高效药剂。7216生物杀虫剂是湖北省天门县微生物研究所从自然死亡的越冬红铃虫体中分离出一株能形成伴孢晶体的芽孢杆菌。该菌株繁殖力强,具有苏云金杆菌的典型特征,伴孢晶体大,多呈短麦型,菌落园型,表面粗糙,属于苏云金杆菌的一个新变种(Baoillus Apple orchards in the province orchards occur in general, pest damage, serious impact on the yield of fruit trees. Nest insect damage is also the peak of flowering fruit trees, can not use chemical pesticides, so an urgent need to screen out a harmless and efficient pharmaceutical agents. 7216 Biopesticide is from Tianmen County, Hubei Province Institute of Microbiology isolated from the natural death of the overwintering red bollworm body can form a spore-forming Bacillus. The strain is characterized by strong propagation ability, typical features of Bacillus thuringiensis, large spore crystal, mostly short stalk type, colony garden type and rough surface, belonging to a new strain of Bacillus thuringiensis