Biological control is a method of pest control that involves the use of living organisms to control or reduce populations of pests. This can include the introduction of natural predators, parasites, or pathogens that feed on or otherwise harm the pest species. Biological control is often used as a more sustainable alternative to chemical pesticides, as it can provide long-term control of pests without harming the environment or non-target species. Researchers in this field study the interactions between different species, as well as the environmental factors that influence the effectiveness of biological control methods. They also work to develop new strategies for controlling pests using biological agents.