Gallon of water, 1 chopped onion add to gal of water. let it sit under the sun for and spray it over your veg plants, n flowers to keep bugs from eating the leaves. (I read this in magazine from old sturbridge village. Cant recall what year.
Some effective pest remedies can be found in the kitchen. Always test homemade remedies on a small portion of the plant to make sure they will not harm it, and never apply on a hot or bright sunny day, which could cause plants to burn.