The present invention generally relates an agricultural formulation comprising a high potency Bacillus thuringiensis subsp. kurstaki strain and a Bacillus thuringiensis subsp. aizawai strain, wherein the weight ratio of Bacillus thuringiensis subsp. kurstaki to Bacillus thuringiensis subsp. aizawai is from about 20:80 to 80:20. The present invention is also directed to methods of manufacturing the formulation of the present invention and using the same to effectively control crop pests.
