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EFFECT OF TEMPERATURE ON TOXICITY OF BACILLUS THURINGIENSIS TO THE OBLIQUEBANDED LEAFROLLER (LEPIDOPTERA: TORTRICIDAE)

Published online by Cambridge University Press:  31 May 2012

S.Y. Li ,
S.M. Fitzpatrick  and
M.B. Isman
S.Y. Li
Affiliation:
Pacific Agriculture Research Centre, Agriculture and Agri-Food Canada, 6660 NW Marine Drive, Vancouver, British Columbia, Canada V6T 1X2
S.M. Fitzpatrick
Affiliation:
Pacific Agriculture Research Centre, Agriculture and Agri-Food Canada, 6660 NW Marine Drive, Vancouver, British Columbia, Canada V6T 1X2
M.B. Isman
Affiliation:
Department of Plant Science, University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z4
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Extract

In recent years, the obliquebanded leafroller, Choristoneura rosaceana (Harris) (Lepidoptera: Tortricidae), has become a major pest of raspberries in the Fraser Valley, British Columbia (Anonymous 1994). Overwintering C. rosaceana larvae begin feeding on raspberry leaf buds in early April. Heavy infestation causes serious damage to raspberry plants. Larvae of the first generation hatch in late June to early July, and feed on growth terminals and berries. The occurrence of this generation usually coincides with berry harvesting time. Because the larvae are shaken from the plants by the harvesting machine, C. rosaceana can be a major contaminant of machine-harvested berries.

Type
Articles
Information
The Canadian Entomologist , Volume 127 , Issue 2 , April 1995 , pp. 271 - 273
Copyright
Copyright © Entomological Society of Canada 1995

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