| Title: | Synthetic pheromone exposure increases calling and reduces subsequent mating in female Contarinia nasturtii (Diptera: Cecidomyiidae) |
| Author(s): | Hodgdon EA; Hallett RH; Heal JD; Swan AE; Chen YH; |
| Address: | "Department of Plant and Soil Science, University of Vermont, Burlington, VT, USA. School of Environmental Sciences, University of Guelph, Guelph, Ontario, Canada" |
| ISSN/ISBN: | 1526-4998 (Electronic) 1526-498X (Linking) |
| Abstract: | "BACKGROUND: Pheromone-mediated mating disruption, which uses large amounts of synthetic female pheromones to interrupt insect reproductive behavior, has been successful for managing important agricultural pests. While multiple mechanisms have been discovered explaining how synthetic pheromone treatments prevent males from finding females, it is less clear how unnaturally large doses of synthetic sex pheromone impact the behavior of female insects, particularly nonlepidopteran females. In some species, 'autodetecting' females possess pheromone receptors and respond to ambient pheromones by altering their mating behavior. Here, we test whether exposure to stereospecific and racemic synthetic pheromones influences calling and subsequent propensity to mate in female swede midge (Contarinia nasturtii Kieffer; Diptera: Cecidomyiidae), a pest of Brassica crops. RESULTS: In both laboratory and field settings, females exposed to stereospecific and racemic three-component pheromone blends called significantly more frequently and for longer durations than midges in control treatments. In the field, midges were twice as likely to call in pheromone-treated plots versus nontreated plots. Additionally, pheromone pre-exposure reduced subsequent mating: while 68% of female midges mated following control conditions, only 42% and 35% of females pre-exposed to stereospecific and racemic three-component blends mated, respectively. CONCLUSION: While more frequent calling within pheromone-treated backgrounds may increase the likelihood that females are detected by males, a reduction in female propensity to mate would increase the efficacy of a pheromone-mediated mating disruption system. Our work presents the first known investigation of autodetection behavior in Cecidomyiidae. Additional research is necessary to understand the implications of female autodetection for swede midge management" |
| Keywords: | "Animals *Diptera Female Male Nematocera Pheromones/pharmacology Reproduction *Sex Attractants/pharmacology Sexual Behavior, Animal autodetection insect behavior invasive pest mating pest management pheromone-mediated mating disruption;" |
| Notes: | "MedlineHodgdon, Elisabeth A Hallett, Rebecca H Heal, James D Swan, Andrea Em Chen, Yolanda H eng 2014 - 70006 - 22525/National Institute of Food and Agriculture/ University of Guelph/ University of Guelph Partnership/Ontario Ministry of Agriculture, Food and Rural Affairs/ GNE16 - 121/Northeast SARE/ England 2020/08/21 Pest Manag Sci. 2021 Jan; 77(1):548-556. doi: 10.1002/ps.6054. Epub 2020 Sep 11" |
