Living Biological Controls are the natural enemies of pests that can be used to keep pest populations below damaging levels. These include spiders, ladybugs, lacewings, praying mantises, predatory mites, many parasitic flies and wasps and more. These species should be protected and encouraged to visit your lawn and garden. Many of today's pest problems were caused by the disruption of natural balances by toxic pesticides. By using living biological controls, you are only affecting the insects or plants it controls because they are so host-specific, and therefore avoids the adverse human health and environmental effects associated with pesticides. Biological control works in an urban environment as well as in agriculture. Most beneficial species can be purchased through the internet or mail-order catalogs.