Capture of female Hylotrupes bajulus as influenced by trap type and pheromone blend.

Three different types of traps were evaluated for a semiochemical-based trapping method for Hylotrupes bajulus (L.) (Cerambycidae). One, designated the ground trap, was the most efficient under both laboratory and natural conditions and had an active space of about 3.5 m. Significantly more beetles were captured in traps baited with a mixture of synthetic pheromones, (3R)-3-hydroxy-2-hexanone [(3R)-ketol] + 1-butanol, than in those with either single compound or with racemic mixtures. Furthermore, the synthetic lure captured more females than two virgin males in a laboratory bioassay. In addition, doubling the concentration of the synthetic pheromone significantly increased trap catches. The present findings have potential value of the management of this pest.