Population of gypsy moth can be controlled by
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Bacillus thuringiensis
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Cactoblastis cactorum
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Phytopthora infestans
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Bacillus subtilis
A
Correct answer
Explanation
Bacillus thuringiensis (Bt) is a soil bacterium that produces proteins toxic to certain insect larvae, including the gypsy moth. It is widely used as a biological control agent in agriculture and forestry.