Evaluation of the efficacy duration of different types of pheromone dispensers to lure Ips typographus (L.) (Coleoptera: Curculionidae: Scolytinae)

Abstract

We presentthe results oftesting10pheromonedispensersused to lure the sprucebark beetle-Ipstypographus(Linnaeus, 1758). A comparisonwas made between boththeir efficacyand also the decrease intheir efficacyafterapplication. DispensersPheagrITand ITEcolureTubusare effectivethroughout the wholeflightactivity ofI. typographus; the efficacy of ITPheagrExtra was partly similar. The others areeffectivefor a declaredperiod ofefficacy, with the exception ofdispenserPheropraxA, which initiallyhad a very good level of catches, butsoonsubsided, and the efficacydid not reach eitherthetimeorthe efficacy ofallthe declaredshelf-life. Overall,themost effective dispenser was ITEcolureMegaand dispensers ITEcolureTubusandFeSexTypo showed a similar efficacy. Completelyunsuitablefor the trapping of I. typographuswere found to be combineddispensersPCHITEtokapandPCITEcolure.

Keywords

• forest protection
• spruce bark beetle
• efficacy
• trapping