Bacillus thuringiensis (B.t.) is a naturally-occurring soil bacterium that resolves into poisonous proteins in pestis alkaline midgut, corrode its intestines wall cell organize, destroy intestines membrane, and enter the lymphoid tissue of blood, at last, the pests die of hunger or appear septicaemia. B.t. is considered ideal for pest control because of its high effect, safty and no residue, with significant control effect on more than 30 kinds of pests in the agricultural, woods, fruit tree and scale wing eye pests of ornamental plant. Especially ideal to non-pollution vegetable plant, afforestation area, the natural forest reserve and the manufacture base of the high quality grain and cotton. Long time used, it can not only make good economic benefits and social benefits, but also can make good ecological benefits.

Application:

Caterpillars that become ill or die after ingesting Btk are not considered dangerous to birds or other animals that feed on them.
In general, sunlight and other microbes destroy Btk applied to foliage within three to five days, so Btk does not multiply or accumulate in the environment.
Perhaps most importantly, Btk does not appear to pose any significant threat to human health or to pets. Btk is often sprayed over large areas from planes or helicopters in formal gypsy moth control programs over large areas but commercial applicators or homeowners can apply Btk effectively to individual trees from the ground.