Weed density per square foot, expected yield loss percentage, and control cost versus crop value. By understanding economic thresholds and applying threshold concepts in weed management, farmers and agronomists can optimize crop yields, reduce unnecessary herbicide applications, and minimize the environmental impact of weed control strategies. However, adoption of the threshold concept has spurred the development of decision models and use of methods of decision analysis. An effective decision model should take economics as well as biological factors into account, viz Nature of weed populations existing in the field, expected crop yield loss due to weed. Action threshold is the point at which some control action is initiated, and usually includes economic considerations along with other less tangible factors such as aesthetics, risk aversion, or sociological pressures.
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