| abstract |
The invention and claim relate to Bacillus thuringiensis isolates designated as B.t. PS50C, B.t. PS86A1, B.t. PS69D1, B.t. PS72L1, B.t. PS75J1, B.t. PS83E5, B.t. PS45B1, B.t. PS24J, B.t. PS94R3, B.t. PS17, B.t. PS62B1 and B.t. PS74G1, which have activity against mites. Thus, these isolates or mutant species thereof can be used to fight against such parasites. In addition, genes encoding new endotoxin-delta can be extracted from these isolates and transferred to other microbes or host plants. Expression of endotoxin-delta in host microbes helps fight mites, while transformed plants become resistant to mites. |