Computer simulated fusiform rust losses from early infection in loblolly plantations

Abstract

A computer simulation model that predicts the fates of individual trees within stands appears promising for projecting fusiform rust losses in infected loblolly pine plantations. In one plantation, observed yield loss between age 10 and 20 was 265 cubic feet and loss predicted from a modified growth simulator for the same period, planting density, and site index was 317 cubic feet. The degree of accuracy could be improved if a measure of stem-gall severity rather than just presence of a stem gall could be devised. Extrapolation of the simulation over a range of 0-90 percent incidence of stem galls at age 3 indicated a linear relationship of loss to early infection amounting to 82 cubic feet between age 10 and 20 for every 10 percent increase in stem gall incidence. Long-term studies would be required to check that projection.

Citation

Lloyd, F. Thomas. 1983. Computer simulated fusiform rust losses from early infection in loblolly plantations. In: Proceedings of the Symposium on the Loblolly Pine Ecosystem (East Region); 1982 Dec. 8-10; Raleigh, NC: 198-204.