The purpose of insect and disease damage surveys is to estimate losses caused by various pests, so that the land manager can prescribe appropriate management action. Systematic ground data collection systems provide to the land manager loss data that can be used for cost benefit analysis, management plans, environmental impact statements, and for projecting losses at a forest level. Damage survey data could be integrated into timber management plans to fill voids in stand models to predict losses. This handbook describes field data collection procedures and data recording necessary to operate the supporting computer program called "INDIDS" (Insect and Disease Damage Survey).
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