QUIZ – Big weeds through the combine

Jay Whetter

waterhemp

Three questions on big weeds at harvest and the seed bank risk. What is the harvest strategy for drowned-out areas with a lot of weeds?

1. Manitoba weed management specialist Kim Brown calls this weed "frightening." What is it?

waterhemp
2. Kochia patches like this one are all over the Prairies this year. Most of them will be glyphosate resistant. While a common canola seed rate is 100 seeds per square metre, how many seeds per square metre does this kochia patch produce?

kochia patch
3. In recent field trials, Agriculture and Agri-Food Canada (AAFC) research scientist Charles Geddes found that pre-harvest glyphosate plus saflufenacil decreased viable kochia seed production by ____ per cent, on average, when applied 10 days before harvest. (Fill in the blank.)