What Is a Good All Purpose Organic Insect Spray for Vegetable Gardens
I have seen some aphids and also green worms on my zucchini. Someone suggested Spinosad and BT for the catterpillars.
Certified GKH Gardening Expert
BT will only treat the caterpillars, but is a good control for them.
I am not all that familiar with Spinosad as it is relatively new, but from what I have read, it works much like neem oil. The plant absorbs it and when a bug eats the plant, it dies. I neem oil (which would be another option for you) works very well, so I imagine that Spinosad would be as effective.