The Q&A Archives: Corn Earworm Control

Question: What's the ratio of Btk to vegetable oil for corn earworm control?

Answer: Bacillus thuringiensis var.'kurstaki', or Btk, is a microbial insecticide and an effective treatment for earworms, cabbage loopers, fruitworms and similar larvae. It can be used alone. Another effective treatment is to place 2-3 drops of mineral oil on the silks to keep earworms from invading your corn.

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