A rudimentary simulator was developed to estimate southern pine beetle (Dendroctonusfrontalis Zimm.) timber mortality damages in future years over large geographical areas in the southern U.S.A. The simulator uses basic data such as monthly mean number of spots, frequency distributions of diameter and number of trees per beetle spot, and certain marketing data. The simulator provides mortality volume and discounted value estimates. Damage reduction patterns for proposed management programs can also be included to calculate program benefits for use in benefit-cost analyses.