Parent Adult Reemergence in Southern Pine Beetle Populations 12

Abstract

Reemergence of southern pine beetle parent adults was estimated from 34 shortleaf pines during a 14-mo period. The infested portion of the tree was divided into 5 equal sections, and a log containing 1000 cm2 of bark surface was removed from the middle of each section. The logs were held in the laboratory until reemergence was complete, at which time the parent adults were counted and sexed. Measurements were also made of attack density, gallery length, and numbers of reemergence holes. Overall percent reemergence ranged from 0–100, and averaged 65. Attack density and reemergence hole density were linearly related to the total number of beetles reemerging, and both independent variables showed significant predictive value.