How do I control cabbageworms?

Question:

How do I control cabbageworms?

Answer:

Cabbageworms are greenish caterpillars that eat large, irregular holes in the foliage of cabbage, broccoli, cauliflower, and Brussel sprouts.  Cabbageworms can be controlled with biological or chemical insecticides.  Bacillus thuringiensis (Bt) is a biological insecticide (a bacterium) that specifically targets caterpillars.  Bt products include Dipel, Thuricide, and others.  Home gardeners can also use chemical insecticides, such as permethrin (e.g., Eight) or carbaryl (e.g., Sevin).