Biological Control of Pests in Forests of Eastern United States




Image Number: 1929056
Subject: Canada thistle
Magnoliopsida > Asterales > Asteraceae
Cirsium arvense (L.) Scop.
Photographer: Alec McClay, Alberta Research Council
Descriptor: Infestation
Description: in canola (Rape seed) field near Consort, Alberta
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Image Citation:
Alec McClay, Alberta Research Council,
Image Use:
This image may be copied and used, in whole or in part, for any non-profit, educational purpose provided that all reproductions bear an appropriate credit. Any commercial or other use of the image requires the written permission of the photographer and