Since 1985, BioLogic Company has produced all-natural pest-control products built around beneficial nematodes, microscopic predators that target insect pests while remaining safe for people, pets, and plants. The Willow Hill, Pennsylvania company sells directly produced nematodes rather than reselling them, with its own research informing application rates and handling designed to keep the live product healthy and active. BioLogic also helps customers identify pests and choose natural treatments.