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Investigating the potential of an autodissemination system for managing populations of vine weevil, Otiorhynchus sulcatus (Coleoptera : Curculionidae) with entomopathogenic fungi
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Pope, Tom, Hough, Gemma, Arbona , Charlotte, Bennison, Jude, Roberts, Harriet, Prince, Gillian and Chandler, Dave (2018) Investigating the potential of an autodissemination system for managing populations of vine weevil, Otiorhynchus sulcatus (Coleoptera : Curculionidae) with entomopathogenic fungi. Journal of Invertebrate Pathology, 154 . pp. 79-84. doi:10.1016/j.jip.2018.04.002 ISSN 0022-2011.
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Official URL: https://doi.org/10.1016/j.jip.2018.04.002
Abstract
Vine weevil, also known as black vine weevil, (Otiorhynchus sulcatus) is an economically important pest affecting soft fruit and nursery stock crops in temperate regions. We used laboratory and polytunnel experiments to investigate a novel control system based on autodissemination of spores of an entomopathogenic fungus used on their own or formulated with talc to populations of adult vine weevils. The fungus was applied as a conidial powder to a simple plastic artificial refuge for vine weevils . The potential for adult weevils to disseminate the fungus was investigated first in polytunnel experiments using fluorescent powders applied to the refuge in lieu of fungal conidia. In this system, 88% of adult weevils came in contact with the powder within 48 hours. When the powder was applied to five adult weevils that were then placed within a population of 35 potential recipients, it was transmitted on average to 75% of the recipient population within 7 days. Three isolates of entomopathogenic fungi (Beauveria bassiana 433.99, B. bassiana 1749.11, Metarhizium brunneum 275.86), selected from a laboratory virulence screen, were then investigated for efficacy when applied as conidial powders in artificial refuges placed among populations of adult weevils held in experimental boxes in the laboratory at 20°C. Under this regime, the fungal isolates caused 70 – 90% mortality over 28 days. A final polytunnel experiment tested the efficacy of conidial powders of M. brunneum 275.86 placed in artificial refuges to increase vine weevil mortality. Overall weevil mortality was relatively low (26-41%) but was significantly higher in cages in which the conidial powders were placed in refuge traps than in cages with control traps. The lower weevil mortality recorded in the polytunnel experiment compared to the laboratory test was most likely a consequence of the greater amounts of inoculum required to kill adult weevils when conditions fluctuate between favourable and unfavourable temperatures e.g. below 15°C. The potential of an autodissemination system for entomopathogenic fungi as a means of controlling vine weevil as part of an integrated pest management programme is discussed.
Item Type: | Journal Article | ||||||||
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Subjects: | Q Science > QL Zoology S Agriculture > SB Plant culture |
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Life Sciences (2010- ) | ||||||||
Library of Congress Subject Headings (LCSH): | Black vine weevil -- Control, Metarhizium brunneum | ||||||||
Journal or Publication Title: | Journal of Invertebrate Pathology | ||||||||
Publisher: | Academic Press | ||||||||
ISSN: | 0022-2011 | ||||||||
Official Date: | May 2018 | ||||||||
Dates: |
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Volume: | 154 | ||||||||
Page Range: | pp. 79-84 | ||||||||
DOI: | 10.1016/j.jip.2018.04.002 | ||||||||
Status: | Peer Reviewed | ||||||||
Publication Status: | Published | ||||||||
Access rights to Published version: | Restricted or Subscription Access | ||||||||
Date of first compliant deposit: | 8 February 2018 | ||||||||
Date of first compliant Open Access: | 12 April 2019 | ||||||||
RIOXX Funder/Project Grant: |
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