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Elusively overwintering: a review of diamondback moth (Lepidoptera: Plutellidae) cold tolerance and overwintering strategy

Published online by Cambridge University Press:  21 February 2018

Tina Dancau ,
Peter G. Mason  and
Naomi Cappuccino
Tina Dancau*
Affiliation:
Department of Biology, Carleton University, 1125 Colonel By Drive, Ottawa, Ontario, K1S 5B6, Canada Ottawa Research and Development Centre, Agriculture and Agri-Food Canada, 960 Carling Avenue, Ottawa, Ontario, K1A 0C6, Canada
Peter G. Mason
Affiliation:
Ottawa Research and Development Centre, Agriculture and Agri-Food Canada, 960 Carling Avenue, Ottawa, Ontario, K1A 0C6, Canada
Naomi Cappuccino
Affiliation:
Department of Biology, Carleton University, 1125 Colonel By Drive, Ottawa, Ontario, K1S 5B6, Canada
*
1Corresponding author (e-mail: tina.dancau@carleton.ca)
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Abstract

There is no consensus on the overwintering strategy used by the diamondback moth, Plutella xylostella (Lepidoptera: Plutellidae). As a result, the topic of diamondback moth overwintering in temperate climates remains controversial. However, there has been general agreement that the diamondback moth does not overwinter in diapause. This review compiles data on low temperature survival to determine cold tolerance mechanisms and the cold tolerance strategy of the diamondback moth. According to cold tolerance data and observations from key overwintering studies in eastern North America, the diamondback moth likely overwinters in a quiescent state in no specific overwintering stage and is chill susceptible. Observations from key overwintering studies suggest a northern overwintering limit for diamondback moth of ~43°N in eastern North America. Climate change may alter winter conditions in temperate climates, making temperate regions susceptible to potential diamondback moth overwintering and recurring outbreaks.

Type
Physiology, Biochemistry, Development, & Genetics
Information
The Canadian Entomologist , Volume 150 , Issue 2 , April 2018 , pp. 156 - 173
Copyright
© Entomological Society of Canada 2018. Parts of this are a work of Her Majesty the Queen in Right of Canada 

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Footnotes

Subject editor: Mark Rheault

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