Double-Death" Predator Nematodes are some of the most useful pest controls to come along in years. They attack and kill more than 250 different insects, including Fleas, Thrips, Fungus Gnats, even insects as large as Cutworms! Nearly any insect that spends a part of its lifecycle in the soil is likely prey for "Double-Death" Predator Nematodes. 1 million per pack. Each package of one million "Double-Death" Predatory Nematodes treats up to 2,500 square feet of soil surface. Price includes 2 day shipping($16.75). Numerous other beneficial insects available-Call or email for more info or for larger orders.