Comparing the toxicity of two fumigants to insects from the field vs laboratory – does insect origin matter?

  • Adriana J. Najar-Rodriguez Plant & Food Research
  • Matthew K.D. Hall Apresso
  • Catherine R. Wilks Plant & Food Research
  • Anthony R. Adlam Plant & Food Research
  • Sam Brierley Plant & Food Research
  • Steven Burgess Plant & Food Research
  • Graeme K. Clare Plant & Food Research

Abstract

The golden-haired bark beetle, Hylurgus ligniperda (F.), is a common forest insect which may be associated with pine (Pinus radiata D.Don) logs exported from New Zealand. We tested the dose-mortality responses of H. ligniperda adults, from two different origins (field vs laboratory), to methyl bromide (MB), the most widely used fumigant worldwide; and to ethanedinitrile (EDN), a potential alternative to MB. Naked insects were fumigated with either MB or EDN at 10°C for 4 and 3 hours, respectively. Laboratory adults had been reared on artificial diet under controlled conditions for >10 generations. Field adults, by contrast, had been recently collected from Lindgren funnel traps with lures of alpha-pinene and ethanol. Tolerance to the two fumigants tested was significantly different, according to the origin of the insects, with field-collected adults being less tolerant to MB and EDN than laboratory-reared ones. The implications of our results for the development of disinfestation schedules for New Zealand export logs will be discussed.

 

 

Published
2018-07-30
How to Cite
Najar-Rodriguez, A., Hall, M., Wilks, C., Adlam, A., Brierley, S., Burgess, S., & Clare, G. (2018). Comparing the toxicity of two fumigants to insects from the field vs laboratory – does insect origin matter?. New Zealand Plant Protection, 71, 350. https://doi.org/https://doi.org/10.30843/nzpp.2018.71.147
Section
Vol 71 Poster Abstracts 2018

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