The ponderosa pine budworm normally is not considered a tree-killer. Recent experience, however, has shown that it can be an important problem. But there is little experience with applied control of this species. Laboratory studies and limited field applications have shown the budworm to be susceptible to several insecticides commonly used against forest defoliators. Foliar sprays have appeared more encouraging than insecticide implants, although data are scanty.
Timing is particularly important in achieving good control.
In general, insecticide applications should coincide with early larval feeding. Consult Colorado State University Cooperative Extension, Colorado State Forest Service or U.S. Forest Service specialists for suggested treatments. Pine shoots damaged by budworm feeding. Other species of pine defoliators can coexist in the shoots along with the ponderosa pine budworm. References Raimo, Bernard J. 1985.