1.历史记载本世纪初,Ishiwata(1902)首先报导分离出苏云金杆菌(Bacillusthuringiensis 下简称 B.t.)菌株,当时命名为 Sotto bacillus,是从病蚕体内分离出的。如今该菌株鉴定为 B.t.Sotto 变种,属血清型4a、4b。1915年,Aoki 和 Ohigasaki 证实只有孢子培养物对蚕(Bombyx mori)有毒,由于对日本一个非常重要的工业部门一养蚕业有相当 1. Historical records Earlier this century, Ishiwata (1902) first reported the isolation of Bacillus thuringiensis (Bacillus thuringiensis referred to B.t.) strain, was named Sotto bacillus, is isolated from the disease silkworm body. The strain is now identified as B.t.Sotto variants, which are serotypes 4a, 4b. In 1915, Aoki and Ohigasaki confirmed that only spore cultures were toxic to Bombyx mori due to the equivalent of sericulture to a very important industrial sector in Japan