Journal
JOURNAL OF ECONOMIC ENTOMOLOGY
Volume 110, Issue 4, Pages 1764-1769Publisher
OXFORD UNIV PRESS INC
DOI: 10.1093/jee/tox132
Keywords
resistance; green peach aphid; Australia; insecticide
Categories
Funding
- Australian Grains Research and Development Corporation
- Australian Government
- Horticulture Innovation Australia
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The green peach aphid, Myzus persicae (Sulzer), is a significant agricultural pest that has developed resistance to a large number of insecticides globally. Within Australia, resistance has previously been confirmed for multiple chemical groups, including pyrethroids, carbamates, organophosphates, and neonicotinoids. In this study, we use leaf-dip and topical bioassays to investigate susceptibility and potential cross-resistance of 12 field-collected populations of Australian M. persicae to three recently registered insecticides: sulfoxaflor, spirotetramat, and cyantraniliprole. Despite all 12 populations carrying known resistance mechanisms to carbamates, organophosphates, and pyrethroids, and two populations also exhibiting low-level metabolic resistance to neonicotinoids, we found little evidence of variation in susceptibility to sulfoxafor, spirotetramat, or cyantraniliprole. This provides further evidence that cross-resistance to spirotetramat, cyantraniliprole, and sulfoxaflor in M. persicae is not conferred by the commonly occurring resistance mechanisms MACE, super-kdr, amplification of the E4 esterase gene, or enhanced expression and copy number of the P450 gene, CYP6CY3. Importantly, this study also established toxicity baseline data that will be important for futuremonitoring of insecticide responses of M. persicae from both broadacre and horticultural crops.
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