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

  • A.J. Najar-Rodriguez The New Zealand Institute for Plant & Food Research Limited, Private Bag 11600, Palmerston North
  • M.K.D. Hall The New Zealand Institute for Plant & Food Research Limited, Private Bag 11600, Palmerston North
  • C.R. Wilks The New Zealand Institute for Plant & Food Research Limited, Private Bag 11600, Palmerston North
  • A.R. Adlam The New Zealand Institute for Plant & Food Research Limited, Private Bag 11600, Palmerston North
  • S. Brierley The New Zealand Institute for Plant & Food Research Limited, Private Bag 11600, Palmerston North
  • S. Burgess The New Zealand Institute for Plant & Food Research Limited, Private Bag 11600, Palmerston North
  • G.K. Clare The New Zealand Institute for Plant & Food Research Limited, Private Bag 11600, Palmerston North

Abstract




The golden-haired bark beetle, Hylurgus ligniperda, is one of the most common insects normally associated with New Zealand export logs. Here 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 ethanedinitrile (EDN), a new fumigant currently being considered as very promising for MB replacement. Naked insects were fumigated with either MB or EDN at 10°C for 4 and 3 hours, respectively. Adults from the laboratory had been reared on an arti cial diet and under controlled conditions for over 10 generations at the time of the experiments. Field adults, on the other hand, had been recently collected from Lindgren funnel traps with lures of alpha-pinene and ethanol. Our results showed that there is a significant difference in the tolerance to the two fumigants tested 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
2017-07-31
How to Cite
NAJAR-RODRIGUEZ, A.J. et al. Comparing the toxicity of two fumigants to insects from the field vs laboratory – does insect origin matter?. New Zealand Plant Protection, [S.l.], v. 70, p. 323, july 2017. ISSN 1179-352X. Available at: <http://journal.nzpps.org/index.php/nzpp/article/view/89>. Date accessed: 19 nov. 2017.
Section
Poster Abstracts

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