Mitagation of Risk to Canola from Spring Flea Beetle Injury

Researcher: Juliana Soroka, Robert Elliott, Owen Olfert, Chrystel Olivier, Russell Hynes, Agriculture and Agri-Food Canada, Saskatoon; Jennifer Otani, Agriculture and Agri-Food Canada, Beaverlodge, AB; Lloyd Dosdall and James Tansey, University of Alberta, Edmonton, AB; John Gavloski, Manitoba Agriculture, Food and Rural Development, Carman, MB

Project Code: 3.3.4

Final Report: April 2013

Summary: A four-year study initiated in 2010 was conducted in western Canada to investigate the differences in biology of two flea beetle species, Phyllotreta striolata (striped) and P. cruciferae (crucifer), in order to better target management methods. The results of the study showed that crucifer and striped flea beetles react differently to their environment, each preferring slightly different optimum climate factors, and having slightly different spring emergence and dispersal characteristics. The differences between the species was especially noticeable in their response to neonicotinoid seed dressings, with striped flea beetles being less susceptible to control by the insecticides tested. This highlights the importance of producer monitoring of newly emerging canola fields for evidence of flea beetle damage to canola seedlings.

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