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DELIA SPP. (DIPTERA: ANTHOMYIIDAE) INFESTING CANOLA IN ALBERTA

Published online by Cambridge University Press:  31 May 2012

H. J. Liu  and
R. A. Butts
H. J. Liu
Affiliation:
Alberta Environmental Centre, Vegreville, Alberta T0B 4L0
R. A. Butts
Affiliation:
Alberta Agriculture, Regional Crops Laboratory, Fairview, Alberta T0H 1L0
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Extract

At the beginning of July 1981 we were informed by plant pathologists conducting disease surveys on canola (= rapeseed) (Brassica campestris L. cvs. Candle, Torch, B. napus L. cvs. Altex, Regent, Tower) in Alberta of the presence of root maggots (Delia spp.) (= Hylemya spp.) in the crop. Although this is not the first observation of this genus infesting canola, no documented account of its geographic distribution or the significance of its damage was available. Canola is an oilseed crop which over the past 10 years has occupied, on average, 1.6 million hectares annually in the three prairie provinces. Therefore, we decided to (a) determine the extent of the damage in Alberta, and (b) collect and rear the insects from infested roots so they could be identified.

Type
Articles
Information
The Canadian Entomologist , Volume 114 , Issue 7 , July 1982 , pp. 651 - 653
Copyright
Copyright © Entomological Society of Canada 1982

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