| Title: | "The Use of F2 Screening for Detection of Resistance to Emamectin Benzoate, Chlorantraniliprole, and Indoxacarb in Australian Populations of Helicoverpa armigera (Lepidoptera: Noctuidae)" |
| Author(s): | Bird LJ; Drynan LJ; Walker PW; |
| Address: | "NSW Department of Primary Industries, Tamworth Agricultural Institute, Marsden Park Rd., Calala, NSW 2340, Australia (lisa.bird@dpi.nsw.gov.au; paul.walker@utas.edu.au). NSW Department of Primary Industries, Australian Cotton Research Institute, Locked Bag 1000, Narrabri, NSW 2390, Australia (linda.drynan@dpi.nsw.gov.au). NSW Department of Primary Industries, Tamworth Agricultural Institute, Marsden Park Rd., Calala, NSW 2340, Australia ( lisa.bird@dpi.nsw.gov.au ; paul.walker@utas.edu.au ). Tasmanian Institute of Agriculture, University of Tasmania, Hobart, TAS 7001, Australia" |
| ISSN/ISBN: | 1938-291X (Electronic) 0022-0493 (Linking) |
| Abstract: | "The ability to effectively detect changes in susceptibility to insecticides is an integral component of resistance management strategies and is highly dependent upon precision of methods deployed. Between 2013 and 2016, F2 screens were performed for detection of resistance alleles in Helicoverpa armigera (Hubner) to emamectin benzoate, chlorantraniliprole, and indoxacarb in major cropping regions of eastern Australia. Resistance to emamectin benzoate was not detected. There were low but detectable levels of survival at discriminating concentrations of chlorantraniliprole and indoxacarb. Alleles conferring an advantage to chlorantraniliprole were present at a frequency of 0.0027 (95% CI 0.0012-0.0064; n = 1,817). Alleles conferring an advantage to indoxacarb were present at a frequency of 0.027 (95% CI 0.020-0.035; n = 1,863). Complementation tests for allelism in six of seven positive indoxacarb tests indicated that resistance was due to alleles present at the same locus. The majority (88%) of lines that tested positive for indoxacarb resistance deviated from a model of recessive inheritance. Pheromone-caught male moths contributed significantly greater numbers of F2 lines compared with moths derived from field-collected eggs or larvae. There was no difference in the detectability of indoxacarb resistance in F2 lines from pheromone-caught moths compared with moths derived from immature stages collected from the field and reared to adult under laboratory conditions. Therefore, we recommend the use of pheromone traps for sourcing insects for F2 screening as a more cost- and time-efficient alternative to traditional methods of sampling" |
| Keywords: | Alleles Animals Australia Chemotaxis Female Insect Control/*methods *Insecticide Resistance Insecticides/*pharmacology Ivermectin/analogs & derivatives/pharmacology Larva/drug effects/growth & development/physiology Male Moths/*drug effects/growth & devel; |
| Notes: | "MedlineBird, L J Drynan, L J Walker, P W eng Research Support, Non-U.S. Gov't England 2017/03/24 J Econ Entomol. 2017 Apr 1; 110(2):651-659. doi: 10.1093/jee/tox037" |
