Concern for the environment, development of pesticide resistance, problems with pesticide safety, and the effects of pesticides on nontarget organisms have sparked interest in finding alternative means of controlling pests. One approach is to identify, establish, and conserve beneficial organisms. Predators attack and consume pests directly. They are usually larger and more active than their prey. For example, insect predators tend to move rapidly and have large eyes and forward-pointing mouthparts.
Parasites use pests as food sources for their young.
For example, insect parasites lay their eggs in, on, or near the pest insect. The offspring then grow in or on the host, and eventually kill it. Pathogens are disease-causing organisms such as bacteria, viruses, and fungi that can infect, kill, or debilitate insects and mites. It is important to remember that many other beneficial organisms such as fungi, bacteria and earthworms also exist in your yard. These can be purchased, or they will come into your garden or landscape on their own, as long as residual insecticides are not sprayed.