Holes in Your Vegetables? How to Stop the Cabbage & Tomato Horn Worm Pests Organically
Spray with B.t. to deal with cabbage worms/cabbage loopers, or the dreaded tomato hornworm.
Bacillus thuringiensis fact sheet (includes list of pests killed by B.t.):
http://www.ext.colostate.edu/pubs/insect/05556.html