| What's the ratio of Btk to vegetable oil for corn earworm control? |
| 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. |
