Early detection of Agrilus planipennis: investigations into the attractive range of the sex pheromone (3Z)‐lactone. Issue 2 (3rd February 2020)

• Record Type: Journal Article
• Authors: Parker, Katie; Ryall, Krista; Aukema, Brian H.; Silk, Peter
• Is Part Of: Entomologia experimentalis et applicata. Volume 168:Issue 2(2020)
• Page Start: 166
• Page End: 173
• Publication Date: 2020-02-03
• Subjects: biological invasions -- forest insect pests -- invasive species -- Buprestidae -- kairomone -- insect lure -- Coleoptera -- emerald ash borer -- Oleaceae -- green sticky prism traps -- (3Z)‐hexenol; Entomology -- Periodicals; 595.7
• DOI: 10.1111/eea.12872
• Languages: English
• ISSNs: 0013-8703

Abstract

Abstract: The emerald ash borer (EAB), Agrilus planipennis Fairmaire (Coleoptera: Buprestidae), is a highly destructive primary pest of ash ( Fraxinus sp., Oleaceae) trees outside of its native range. Ash is an important component of many ecosystems and its loss would be detrimental to both the economy and the environment. The present study aimed to improve our understanding of the effectiveness of green sticky prism traps baited with host kairomone and insect pheromone lures for A. planipennis and to collect data for modelling the range of attraction of the pheromone (3 Z )‐dodecen‐12‐olide [(3 Z )‐lactone]. Traps were deployed over a single flight season in urban locations of Ontario, Canada, with low densities of EAB. Traps were placed in pairs of trees separated by not more than 25 m. All traps contained the host kairomone, (3 Z )‐hexenol, with the remaining half in each pairing additionally baited with (3 Z )‐lactone pheromone. Both lure types were highly effective in capturing EAB, with >90% detection rates overall. However, traps baited with the lactone pheromone and host volatile lures doubled trap captures of EAB over distances of at least 25 m from the nearest traps baited with only host volatiles. Although the baseline detection rate of traps containing (3 Z )‐hexenol alone is not significantly reduced compared with traps containing (3 Z )‐lactone, the overall trap effectiveness is significantly increased when (3 Z )‐lactone is present. The implications for the use of (3 Z )‐lactone at 3 mg per septum dose in an early warning trapping system are discussed. Trap layout methods and risk‐based analysis models can now be further refined by including these data about the attractive range of lures and their behaviour in different plot environments. Abstract : This study extends previous studies that have found that green traps deployed in low‐density populations of Agrilus planipennis (Coleoptera: Buprestidae) are enhanced by the addition of the female‐produced pheromone (3 Z )‐lactone, in the presence of the host‐produced green leaf volatile (3 Z )‐hexenol. The attractive range of the (3 Z )‐lactone pheromone lure in combination with the host volatile is at least 25 m, and traps baited with these lures capture predominantly males.