Evaluation of trap efficiency for the Asian longhorned beetle, Anoplophora glabripennis

The Asian longhorned beetle (ALB), Anoplophora glabripennis, is a well-known stem borer with high polyphagous properties causing frequent outbreaks in northeast China. An attractant-based trap is needed to improve the sensitivity, reliability, and efficiency for detection of the beetle. In this study, the effects of attractants, trap types and color synergy of a trapping system were evaluated. Attractant blends comprised of the male-produced, two-component pheromone plus plant volatiles were used in the field in Hengshui city. Plant volatiles (e.g., 1-pentanol, and 2-pentanol) in combination with male pheromones increased the mean number of trapped ALB compared to the pheromone alone. Males responded better than females to traps baited with plant volatiles alone, whereas traps emitting plant volatiles plus pheromone, regardless of trap type, captured more females than males. The ALB-trapping efficiency of a modified flight intercept panel trap was more than ten times as high as a woodborer panel trap and 1.2 times a flight intercept panel trap. The 1-pentanol and 2-pentanol attractants alone or in combination with male-produced pheromone were more effective for monitoring ALB than common lures. In laboratory Y-tube olfactometer experiments, the color brown was better at increasing attraction of both males and females to 1-pentanol, 2-pentanol, 1-pentanol + pheromone, and 2-pentanol + pheromone compared to the clear-glass control arm. The findings provide a reliable and effective trap system to monitor ALB infestations.