Response of the macadamia seed weevil Kuschelorhynchus macadamiae (Coleoptera: Curculionidae) to Metarhizium anisopliae and Beauveria bassianain laboratory bioassays
Article
Article Title | Response of the macadamia seed weevil Kuschelorhynchus macadamiae (Coleoptera: Curculionidae) to Metarhizium anisopliae and Beauveria bassianain laboratory bioassays |
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ERA Journal ID | 2939 |
Article Category | Article |
Authors | Khun, Kim Khuy (Author), Ash, Gavin J. (Author), Stevens, Mark M. (Author), Huwer, Ruth K. (Author) and Wilson, Bree A.L. (Author) |
Journal Title | Journal of Invertebrate Pathology |
Journal Citation | 174, pp. 1-7 |
Article Number | 107437 |
Number of Pages | 7 |
Year | 2020 |
Publisher | Elsevier |
Place of Publication | Netherlands |
ISSN | 0022-2011 |
1096-0805 | |
Digital Object Identifier (DOI) | https://doi.org/10.1016/j.jip.2020.107437 |
Web Address (URL) | https://www.sciencedirect.com/science/article/abs/pii/S0022201120301439 |
Abstract | Macadamia seed weevil, Kuschelorhynchus macadamiae Jennings and Oberprieler, is a major pest of macadamia in eastern Australia, causing yield losses of up to 15%. Current control methods involve two applications of acephate per season but more recently have moved to a single application of indoxacarb, combined with the collection and destruction of fallen nuts that contain developing larvae. As a first step towards reducing the dependence of the industry on synthetic insecticides, we tested six isolates of M. anisopliae, six isolates of B. bassiana and one commercial B. bassiana product (Velifer® biological insecticide) against adult macadamia seed weevil under laboratory conditions. All isolates were pathogenic against adult weevils with M. anisopliae ac- cession ECS1/BRIP 70272 and B. bassiana accession B27/BRIP 70267 causing 97.5% and 92.5% mortality 12 days after being treated at 1 × 107 conidia/mL. Isolates ECS1/BRIP 70272 and B27/BRIP 70267 had the shortest LT50 values of 5.13 days and 5.37 days respectively. The median lethal concentrations (LC50) for ECS1/ BRIP 70272 and B27/BRIP 70267 were 1.48 × 105 and 1.65 × 105 conidia/mL respectively. Results of this study indicate that M. anisopliae accession ECS1/BRIP 70272 and B. bassiana accession B27/BRIP 70267 have considerable potential for K. macadamiae control, and should be developed into biological insecticides for in- tegration into macadamia pest management programs. |
Keywords | Macadamia, Kuschelorhynchus, Metarhizium, Beauveria, Virulence, Pathogenicity |
ANZSRC Field of Research 2020 | 300210. Sustainable agricultural development |
300804. Horticultural crop protection (incl. pests, diseases and weeds) | |
Byline Affiliations | Centre for Crop Health |
Department of Primary Industries, New South Wales | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q5xwy/response-of-the-macadamia-seed-weevil-kuschelorhynchus-macadamiae-coleoptera-curculionidae-to-metarhizium-anisopliae-and-beauveria-bassianain-laboratory-bioassays
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