This is probably a daft question, but if you use specific plants to attract
butterflies to the garden, won't the caterpillars then eat everything in
sight? Are there some caterpillars that are not good to have in the garden?
I'm thinking of cabbage white, for instance -- don't they ruin your veggies?
How do you tell the difference between "good" caterpillars and "bad" ones
(no doubt that's politically incorrect)?