Introduction
Bti, which was isolated from soil, has a specific effect on mosquito control. The products are most widely used in killing mosquitoes, mainly including Anopheles and Aedes, and can control filariasis, dengue fever, malaria, fiebre amarilla,encephalitis, oncocerciasis and other arbovirus transmission fevers. Theproducts, which are highly recommended by WHO, have good selectivity on killingmosquitoes, no toxicity on human and livestock and no pollutions to the environments.