You must also determine whether the pest is present at a level, or threshold, where it can cause significant damage. The presence of a few pests does not always mean there is a problem. If pests are found at damaging levels, IPM calls for a variety of approaches to be considered when dealing with the problem. These include biological, mechanical, and chemical controls. Biological controls include the use of beneficial insects, diseases and parasites to control pests.
Chemical controls refer to the use of chemical pesticides.
The controls chosen are the ones which work the best and pose the least risk to people and the environment.