The present invention generally relates to the use of synergistic amounts of Bacillus thuringiensis subsp. aizawai and Bacillus thuringiensis subsp. kurstaki for the control of diamondback moth, beet armyworm, sugarcane borer, soybean looper, corn earworm, cabbage looper and southwestern corn borer, wherein the ratio of Bacillus thuringiensis subsp. kurstaki to Bacillus thuringiensis subsp. aizawai is from about 1:0.001 to about 1:3.5.
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