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J Chem Ecol

Title:		"Electrophysiological and Behavioral Responses of Adult Vine Weevil, Otiorhynchus sulcatus (Coleoptera: Curculionidae), to Host Plant Odors"
Author(s):		Roberts JM; Kundun J; Rowley C; Hall DR; Douglas P; Pope TW;
Address:		"Centre for Integrated Pest Management, Harper Adams University, Newport, Shropshire, TF10 8NB, UK. jroberts@harper-adams.ac.uk. Centre for Applied Entomology and Parasitology, School of Life Sciences, Keele University, Keele, Staffordshire, ST5 5BG, UK. jroberts@harper-adams.ac.uk. Centre for Integrated Pest Management, Harper Adams University, Newport, Shropshire, TF10 8NB, UK. Natural Resources Institute, University of Greenwich, Central Avenue, Chatham Maritime, Kent, ME4 4TB, UK"
Journal Title:		J Chem Ecol
Year:		2019
Volume:		20191022
Issue:		10
Page Number:		858 - 868
DOI:		10.1007/s10886-019-01108-x
ISSN/ISBN:		1573-1561 (Electronic) 0098-0331 (Linking)
Abstract:		"Vine weevil, Otiorhynchus sulcatus F. (Coleoptera: Curculionidae), is an economically important pest species in many soft-fruit and ornamental crops. Economic losses arise from damage to the roots, caused by larvae, and to the leaves, caused by adults. As adults are nocturnal and larvae feed below ground, infestations can be missed initially, with controls applied too late. In the absence of a vine weevil sex or aggregation pheromone, the development of an effective semiochemical lure for better management of this pest is likely to focus on host-plant volatiles. Here, we investigate the electrophysiological and behavioral responses of adult vine weevils to volatile organic compounds (VOCs) originating from their preferred host plant Euonymus fortunei, and synthetic VOCs associated with this host when presented individually or as blends. Consistent electroantennographic responses were observed to a range of generalist VOCs. Behavioral responses of weevils to VOCs, when presented individually, were influenced by concentration. Vine weevil adults showed directional movement toward a mixture of seven plant volatiles, methyl salicylate, 1-octen-3-ol, (E)-2-hexenol, (Z)-3-hexenol, 1-hexanol, (E)-2-pentenol, and linalool, even though no, or negative, responses were recorded to each of these compounds presented individually. Similarly, vine weevils showed directional movement toward a 1:1 ratio mixture of (Z)-2-pentenol and methyl eugenol. Results presented here point to the importance of blends of generalist compounds and their concentrations in the optimization of a lure"
Keywords:		"Animals Behavior, Animal/drug effects Electrophysiological Phenomena/drug effects Euonymus/*chemistry/metabolism Gas Chromatography-Mass Spectrometry Larva/drug effects/physiology Volatile Organic Compounds/analysis/*chemistry/pharmacology Weevils/*physio;"
Notes:		"MedlineRoberts, Joe M Kundun, Jhaman Rowley, Charlotte Hall, David R Douglas, Paul Pope, Tom W eng SF/HNS 127/Agricultural and Horticultural Development Board/ HNS 195/Agricultural and Horticultural Development Board/ 2019/10/23 J Chem Ecol. 2019 Oct; 45(10):858-868. doi: 10.1007/s10886-019-01108-x. Epub 2019 Oct 22"