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2014-15 Weed Survey

By: John Ippolito, Regional Crop Specialist, Kindersley

Agriculture and Agri-Food Canada conducted a weed survey in Saskatchewan during the 2014-15 growing seasons. They were conducted in the major field crops during July and August, recording weeds present after weed control operations were done.

In total, there were 2,242 fields sampled with these fields categorized by crop grown and eco-region.

The top three species in the province were green foxtail, wild oats and wild buckwheat. These have been the top three since the start of weed surveys in the 1970s. Part of the reason for conducting these surveys is to document shifts in weed species over time and changes in management practices. Three species that have increased in surveys since the 1980s are foxtail barley, dandelion and narrow-leaved hawk’s-beard.

There were 378 fields surveyed in west central Saskatchewan as part of this survey. The regional results from this survey differ from the provincial results. The chart below shows the top ten weeds based on abundance for the west central region and ranking based on the whole province.

Weed Species Relative abundance in West Central Region Saskatchewan (ranking by abundance)
Green foxtail 42.0 1
Canola/rapeseed 35.3 4
Wild oats 27.9 2
Narrow-leaved hawk’s-beard 24.6 9
Wild buckwheat 22.8 3
Lamb’s-quarters 13.9 8
Spiny annual sow-thistle 13.1 6
Canada thistle 10.3 5
Stinkweed 9.6 11
Wheat 8.2 13

Extreme weather events may partially explain some of the results seen in the west central region. For example, volunteer canola may have emerged at a time when control was not possible in some crops.

This is relatively preliminary data and further work is being done to study the management practices of the fields in the survey.

For more detailed information on the 2014-15 Weed Survey contact your Regional Crop Specialist.

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