| Title: | MCH-Based Semiochemical Repellents for Protecting Engelmann Spruce Trees From Dendroctonus rufipennis (Coleoptera: Curculionidae) |
| Author(s): | Audley JP; Fettig CJ; Steven Munson A; Blackford DC; Mortenson LA; Mafra-Neto A; |
| Address: | "Pacific Southwest Research Station, USDA Forest Service, 1731 Research Park Drive, Davis, CA 95618, USA. Forest Health Protection, USDA Forest Service, 4746 South 1900 East, Ogden, UT 84403, USA. Pacific Southwest Research Station, USDA Forest Service, 2480 Carson Road, Placerville, CA 95667, USA. ISCA Incorporation, 1230 Spring Street, Riverside, CA 92507, USA" |
| ISSN/ISBN: | 1938-291X (Electronic) 0022-0493 (Linking) |
| Abstract: | "Spruce beetle, Dendroctonus rufipennis Kirby (Coleoptera: Curculionidae), is a lethal pest of spruce trees in North America. Despite decades of research, a semiochemical repellent that consistently and effectively protects spruce trees remains elusive. We evaluated the efficacy of 3-methyl-2-cyclohexen-1-one (MCH) in a proprietary, volatile compound release technology (SPLAT) alone and with two adjuvants, Acer kairomone blend (AKB) and acetophenone + green leaf volatiles (PLUS) to protect individually treated Picea engelmannii Parry ex. Engelm. (Pinales: Pinaceae), and Pi. engelmannii within 11.3-m radius of the individually treated trees from colonization and mortality attributed to D. rufipennis in western Wyoming. Ninety-one Pi. engelmannii were baited with frontalin and randomly assigned to one of seven treatments (n = 13): 3.5 g of MCH applied as SPLAT MCH (SPLAT3.5), 3.5AKB, 3.5PLUS, 7 g of MCH applied as SPLAT MCH (SPLAT7), 7AKB, 7PLUS, and baited control (bait only). All repellents except SPLAT3.5 and SPLAT7 significantly reduced colonization of individually treated Pi. engelmannii compared to the baited control. 3.5PLUS, 7AKB, and 7PLUS reduced colonization most effectively, and all repellents significantly reduced mortality of individually treated Pi. engelmannii compared to the baited control. All repellents also significantly reduced colonization and mortality of neighboring Pi. engelmannii" |
| Keywords: | Animals *Coleoptera *Insect Repellents/pharmacology Pheromones/pharmacology *Picea Trees *Weevils Acer kairomone blend 3-methyl-2-cyclohexen-1-one acetophenone green leaf volatiles spruce beetle; |
| Notes: | "MedlineAudley, Jackson P Fettig, Christopher J Steven Munson, A Blackford, Darren C Mortenson, Leif A Mafra-Neto, Agenor eng Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, Non-P.H.S. England 2021/12/28 J Econ Entomol. 2022 Feb 9; 115(1):187-192. doi: 10.1093/jee/toab251" |
