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Controlling insecticide resistant clones of the aphid, Myzus persicae, using the entomopathogenic fungus Akanthomyces muscarius : fitness cost of resistance under pathogen challenge
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Erdos, Zoltan, Chandler, Dave, Bass, Chris and Raymond, Ben (2021) Controlling insecticide resistant clones of the aphid, Myzus persicae, using the entomopathogenic fungus Akanthomyces muscarius : fitness cost of resistance under pathogen challenge. Pest Management Science, 77 (11). pp. 5286-5293. doi:10.1002/ps.6571
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Official URL: https://doi.org/10.1002/ps.6571
Abstract
BACKGROUND
Biological control is a cornerstone of integrated pest management and could also play a key role in managing the evolution of insecticide resistance. Ecological theory predicts that the fitness cost of insecticide resistance can be increased under exposure to invertebrate natural enemies or pathogens, and can therefore increase the value of integrating biological control into pest management. In this study of the peach potato aphid, Myzus persicae, we aimed to identify whether insecticide resistance affected fitness and vulnerability of different aphid clones to the entomopathogenic fungus Akanthomyces muscarius.
RESULTS
Insecticide resistant clones were found to be slightly less susceptible to the pathogen than susceptible clones. However, this pattern could also be explained by the influence of length of laboratory culture, which was longer in susceptible clones and was positively correlated with susceptibility to fungi. Furthermore, resistance status did not affect aphid development time or intrinsic rate of increase of aphids. Finally, in a cage trial the application of fungus did not increase the competitive fitness of insecticide resistant clone ‘O’.
CONCLUSION
We found no fitness cost in reproductive rate or pathogen susceptibility associated with chemical resistance in M. persicae. In contrast, some susceptible clones, particularly those subject to decades of laboratory rearing, showed enhanced susceptibility to a fungal pathogen, but not reduced reproductive fitness, an observation consistent with down-regulation of costly immune functions in culture. Overall, fungal pathogen control is compatible with insecticides and should not increase the selection pressure for resistance of M. persicae to chemical insecticides.
| Item Type: | Journal Article | ||||||||
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| Subjects: | Q Science > QL Zoology Q Science > QR Microbiology S Agriculture > SB Plant culture |
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| Divisions: | Faculty of Science, Engineering and Medicine > Science > Life Sciences (2010- ) | ||||||||
| SWORD Depositor: | Library Publications Router | ||||||||
| Library of Congress Subject Headings (LCSH): | Biological pest control agents , Pests -- Biological control , Natural pesticides , Insecticide resistance , Aphids -- Insecticide resistance , Pathogenic microorganisms , Pests -- Integrated control, Fungi as biological pest control agents , Green peach aphid -- Insecticide resistance | ||||||||
| Journal or Publication Title: | Pest Management Science | ||||||||
| Publisher: | Wiley | ||||||||
| ISSN: | 1526-4998 | ||||||||
| Official Date: | November 2021 | ||||||||
| Dates: |
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| Volume: | 77 | ||||||||
| Number: | 11 | ||||||||
| Page Range: | pp. 5286-5293 | ||||||||
| DOI: | 10.1002/ps.6571 | ||||||||
| Status: | Peer Reviewed | ||||||||
| Publication Status: | Published | ||||||||
| Reuse Statement (publisher, data, author rights): | This is the peer reviewed version of the following article: Erdos, Z., Chandler, D., Bass, C. and Raymond, B. (2021), Controlling insecticide resistant clones of the aphid, Myzus persicae, using the entomopathogenic fungus Akanthomyces muscarius: fitness cost of resistance under pathogen challenge. Pest Manag Sci., which has been published in final form at: https://onlinelibrary.wiley.com/doi/10.1002/ps.6571 . This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. This article may not be enhanced, enriched or otherwise transformed into a derivative work, without express permission from Wiley or by statutory rights under applicable legislation. | ||||||||
| Access rights to Published version: | Restricted or Subscription Access | ||||||||
| RIOXX Funder/Project Grant: |
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