Introduction

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Table 5. Yield Losses (Percent) in Canola Caused by Wild Oats and Volunteer Cereals.
Weed Density – Number Per Square Metre
1 2 4 6 8 10 12 14 16 18 20 25 30
Wild Oats 3 5 6 8 9 10 11 12 13 14 15 16 18
Volunteer Wheat 1 3 6 8 10 11 12 14 15 16 17 19 21
Volunteer Barley 3 5 8 10 12 14 15 17 18 19 20 23 25
Sources: Dew and Keys, Agriculture Canada (Lacombe, Alberta); and O’Donovan, Alberta Environmental Centre
(Vegreville, Alberta)
Figure 2. Spray Decision Guideline for Wild Oats and Volunteer Cereals in Canola.
Weed Control