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Pest Manag Sci

Title:		"Attractiveness of host banana leaf materials to the banana weevil, Cosmopolites sordidus in Ghana for development of field management strategies"
Author(s):		Abagale SA; Woodcock CM; Chamberlain K; Osafo-Acquaah S; Van Emden H; Birkett MA; Pickett JA; Braimah H;
Address:		"Crops Research Institute, Council for Scientific and Industrial Research, Kumasi, Ghana. Department of Chemistry, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana. Biointeractions and Crop Protection Department, Rothamsted Research, Harpenden, UK. School of Agriculture, Policy and Development, The University of Reading, Reading, UK. School of Chemistry, Cardiff University, Cardiff, UK"
Journal Title:		Pest Manag Sci
Year:		2019
Volume:		20181022
Issue:		2
Page Number:		549 - 555
DOI:		10.1002/ps.5182
ISSN/ISBN:		1526-4998 (Electronic) 1526-498X (Print) 1526-498X (Linking)
Abstract:		"BACKGROUND: The banana weevil, Cosmopolites sordidus, has been frequently cited as the most challenging constraint to banana and plantain production, particularly in small-scale (smallholder) farming. For the development of a new, low-cost weevil management technology based on attractive host plant material, we previously identified (2R,5S)-theaspirane as the active component of attractive senesced banana leaves. In this new study, we used behavioural (olfactometer) bioassays with adult weevils to compare the attractiveness of four different developmental stages of banana leaves, i.e. unfolding (pale green), matured green (deep green), matured yellowing and senesced, to determine which leaf developmental stage would be most appropriate for use in weevil management. We also investigated the attractiveness of senesced leaf extracts prepared using different solvents to determine which solvent would be most appropriate for local production of leaf extracts. Coupled gas chromatography-electroantennography (GC-EAG) was then used with adult weevils to confirm the presence of (2R,5S)-theaspirane in attractive leaf extracts. RESULTS: Of the leaf materials tested, only the odour of senesced leaf material was significantly attractive to adult weevils (P < 0.005). Furthermore, an extract of senesced material prepared using palm wine alcohol was significantly attractive (P < 0.05). Using coupled GC-EAG with weevil antennae, (2R,5S)-theaspirane was identified as a minor component with strong EAG activity within the palm wine alcohol extract. CONCLUSION: The results suggest that palm wine alcohol extracts of senesced banana leaf material could be used to lure adult C. sordidus to traps in the field, as part of an ethnobotanical-based approach for C. sordidus management on smallholder farms. (c) 2018 The Authors. Pest Management Science published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry"
Keywords:		"Animals *Chemotaxis Chromatography, Gas Ghana Insect Control/methods Musa/*chemistry Pheromones/*pharmacology Volatile Organic Compounds/chemistry/*pharmacology Weevils/*physiology attraction banana leaves banana weevil electrophysiology olfactometer palm;"
Notes:		"MedlineAbagale, Samson A Woodcock, Christine M Chamberlain, Keith Osafo-Acquaah, Samuel van Emden, Helmut Birkett, Michael A Pickett, John A Braimah, Haruna eng BBS/E/C/00004945/BB_/Biotechnology and Biological Sciences Research Council/United Kingdom BBS/E/C/00004944/BB_/Biotechnology and Biological Sciences Research Council/United Kingdom Crops Research Institute of CSIR/ University for Development Studies/ BBS/OS/CP/000001/Biotechnology and Biological Sciences Research Council's Industrial Strategy Challenge Fund/ Leverhulme Royal Society Africa Award/ Kwame Nkrumah University of Science and Technology/ England 2018/08/24 Pest Manag Sci. 2019 Feb; 75(2):549-555. doi: 10.1002/ps.5182. Epub 2018 Oct 22"