Action Threshold
A level at which some form of pro-active control is expected to be taken to control levels of pests, disease, or weeds within the Integrated Pest Management system. Incidences of weeds, pests and diseases below the action threshold are deemed to be acceptable to the manager and no particular activity will be required in controlling low levels of weed, pest, or disease. For example, an action threshold for earthworm casts might be 15 per square metre for a general quality football pitch. Any greater than this number and additional maintenance activities will be needed to specifically address the issue.