I think you are nuts using insecticide for prevention. The stuff is not benign to you...never mind the earthworms!

Sevin???? That's the most toxic pesticide for earthworms, reportly to kill 90-100% of earthworm population!!!!!!

I have not used an insecticide for sevin (7) years, ever since I changed to an organic program. Once I quit using chemicals, I saw the return of the lizards, toads, birds, and geckos to do my insect control for me. I used to have overpopulations of earwigs and sow bugs but not anymore. Just something to consider. If you are interested in an alternative to a chemical program, look in the Organic Gardening forum for the FAQs for the one on organic lawn care. It is inexpensive, easy to do, and won't stink up the neighborhood.

Most insects are good for your yard, lawn and gardens alike. They are an essential part of the soil food web as are bacteria, fungus, worms, nematodes , protozoa. The original poster did not state his reason for wanting to kill off the insects. If he / she/ you are doing that just because you think they are ugly, then get over it. bugs are beautiful baby Check out the link below to learn all ever wanted to know about insects. Bill Hill

Here is a link that might be useful: All about insects