Question: My cabbage heads are full of worms. What are they? What controls them?

Answer: Those are cabbage loopers. Use the organic control Bacillus thuringiensis (“Bt”) as a spray or dust. It can be used the same day as you harvest, although you’ll probably need it long before that time. It will take several hours to kill the caterpillars, but they will stop feeding almost immediately after you treat.

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