Attractiveness of host banana leaf materials to the banana weevil, Cosmopolites sordidus in Ghana for development of field management strategies

A - Papers appearing in refereed journals

Abagale, S. A., Woodcock, C. M., Chamberlain, K., Ofaso-Acquaah, S., Van Emden, H., Birkett, M. A., Pickett, J. A. and Braimah, H. 2018. Attractiveness of host banana leaf materials to the banana weevil, Cosmopolites sordidus in Ghana for development of field management strategies . Pest Management Science.

AuthorsAbagale, S. A., Woodcock, C. M., Chamberlain, K., Ofaso-Acquaah, S., Van Emden, H., Birkett, M. A., Pickett, J. A. and Braimah, H.
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, ie. 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.

KeywordsBanana leaves; Olfactometer; Attraction; Banana weevil; Palm wine alcohol; Electrophysiology
Year of Publication2018
JournalPest Management Science
Digital Object Identifier (DOI)doi:10.1002/ps.5182
PubMed ID30136428
Open accessPublished as ‘gold’ (paid) open access
FunderBiotechnology and Biological Sciences Research Council
Royal Society-Leverhulme Trust
Funder project or codeChemical Ecology and IPM for the banana weevil in Ghana
BBSRC Strategic Programme in Smart Crop Protection
Africa Award 2012-2016
Publisher's version
Accepted author manuscript
Output statusE-publication ahead of print
Publication dates
Online22 Aug 2018
Publication process dates
Accepted22 Aug 2018
PublisherWiley-Blackwell
Wiley
Copyright licenseCC BY
ISSN1526-498X

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