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HAZARD - RATING SYSTEMS FOR FOREST PESTS
William E . Waters 한국산림과학회 1985 한국산림과학회지 Vol.71 No.1
The term hazard denotes the relative probability of occurrence of pest-caused damage to individual trees and/or forest stands, usually with reference to a specific insect or disease. Hazard ratings generally are based on individual tree, stand, or site factors associated with the frequency and severity of observed damage. Thus, they require a sound and thorough knowledge of pest-host-site relationships expressed quantitatively. Since natural enemies and host resistance also affect probabilities of pest build-up and damage, these factors should be incorporated into hazard rating, insofar ;is possible. Several approaches to the development of ranting systems, and their importance in pest management, are discussed.