Preserving the Green Sale Value of Dying Ponderosa Pine with Lindane

摘要

Pines with dead or dying crowns but without insects or stain in the lower trunk were sprayed in early spring with 1 percent lindane emulsion. The pheromone triplet of the western pine beetle was used to attract the beetle to some of the treated and untreated trees. By late fall 93 percent of the sprayed trees, but only 7 percent of the unsprayed trees, were still without insect attack or wood stain.