Acaricidal activity of the aggregation pheromone of Japanese pine sawyer against two-spotted spider mite |
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| Affiliation: | 1. The BCPH Unit of Molecular Physiology, Department of Chemistry, Biology and Marine Science, Faculty of Science, University of the Ryukyus, Nishihara, Okinawa 903-0213, Japan;2. Center for Research Advancement and Collaboration, University of the Ryukyus, Nishihara, Okinawa 903-0213, Japan;3. Japan Butterfly Conservation Society, Shinagawa, Tokyo, Japan;4. Institute for Integrated Radiation and Nuclear Science, Kyoto University, Kumatori, Osaka 590-0494, Japan;1. Integrated Pest Management Laboratory, Department of Entomology, University of Agriculture, Faisalabad, Pakistan;2. Department of Entomology, University of Agriculture, Faisalabad, Depalpur Campus, Okara, Pakistan;3. Key Lab of Molecular Biology of Crop Pathogens and Insects, Institute of Insect Sciences, College of Agriculture & Biotechnology, Zhejiang University, Hangzhou 310058, PR China;4. Institute of Geography, Fujian Normal University, 350007, China;5. College of Life Sciences and Oceanography, Shenzhen University, Shenzhen, 518060, PR China;6. Insect Biodiversity and Conservation Group, Department of Entomology, Pir Mehr Ali Shah Arid Agriculture University, Rawalpindi, Pakistan;7. Research Center for Advanced Materials Science (RCAMS), King Khalid University, P.O. Box 9004, Abha 61413, Saudi Arabia;8. Unit of Bee Research and Honey Production, Faculty of Science, King Khalid University, P.O. Box 9004, Abha 61413, Saudi Arabia;9. Biology Department, Faculty of Science, King Khalid University, P.O. Box 9004, Abha 61413, Saudi Arabia;10. Department of Botany, Government College University Faisalabad, Pakistan;1. Ojeong Eco-Resilience Institute, Korea University, Seoul 02841, Republic of Korea;2. Department of Environmental Science and Ecological Engineering, Korea University, Seoul 02841, Republic of Korea;3. Institute of Environment and Ecology, OJERI, Korea University, Seoul 02841, Republic of Korea;1. Department of Plant Medicine, College of Agriculture, Life and Environment Sciences, Chungbuk National University, Cheongju 28644, Republic of Korea;2. Plant Quarntine Technology Center, Animal and Plant Quarantine Agency, Gimcheon 39660, Republic of Korea;1. School of Horticulture and Plant Protection & Institute of Applied Entomology, Yangzhou University, Yangzhou 225009, China;2. Joint International Research Laboratory of Agriculture and Agri-Product Safety, Ministry of Education, Yangzhou University, Yangzhou, China |
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| Abstract: | Japanese pine sawyer (Monochamus alternatus) (Coleoptera: Cerambycidae), a vector of pine wilt disease, produces male-produced aggregation pheromone called monochamol, 2-(1-undecyloxy)-1-ethanol (C11OEtOH). After the identification of unique nematicidal activity of the synthetic monochamol and its homologues (ROEtOH: R = C7-C11) against Bursaphelenchus xylophilus nematode, their acaricidal activities were evaluated against two spotted spider mite (TSSM, Tetranychus urticae Koch) (Acari: Tetranychidae). In a leaf disc bioassay method, 100 mgL−1 of monochamol and 2-(1-decyloxy)-1-ethanol (C10OEtOH) exhibited 100% adult mortality and zero fecundity. Along with C11OEtOH and C10OEtOH, 2-(1-octyloxy)-1-ethanol (C8OEtOH) and 2-(1-nonyloxy)-1-ethanol (C9OEtOH) were also 100% acaricidal with complete oviposition inhibition at increased concentration of 1000 mgL−1. When the TSSM eggs on leaf discs were immersed in 1000 mgL−1 solutions, none of the components were ovicidal. Egg hatching was completely inhibited by three components (C9OEtOH, C10OEtOH and C11OEtOH) at 6000 mgL−1 and by four components (C8OEtOH, C9OEtOH, C10OEtOH and C11OEtOH) at 8000 mgL−1. However, none of the compounds showed acaricidal effects in 0.5 h and 24 h residual toxicity tests at 1000 mgL−1. This study highlights the potential acaricidal activity of monochamol and its homologues. Notably, the monochamol and its C10-homologue could be listed as efficient acaricidal agents. |
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| Keywords: | Acaricide Monochamol Pine wilt disease TSSM |
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