Dr. Pye's Scanmask 10 Million Live Beneficial Nematodes - Kills Over 230 Bugs If temperatures are over 85 degrees F. in your area, please choose expedited shipping. They are completely compatible with beneficial insects such as ladybugs, lacewings, and praying mantids and do not harm earthworms. These microscopic insects will seek out and destroy over 230 kinds of soil dwelling and wood boring insects. Will not affect humans, animals, or plants Steinernema Feltiae, covers 200 sq ft Mix directly into the soil or apply with a sprayer