Dr. Pye's Scanmask 1 Million Live Beneficial Nematodes - New Easy Spray Formula 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 Treats 29 square feet, or over 140 six inch pots. Great for indoor plants. Great for use with watering can, hand, pressure or injector sprayers.