Attack weeds early to avoid yield loss, resistance

Bob Blackshaw of Agriculture Canada discusses herbicide resistant weeds June 8 during a Farming Smarter “plot hop” in Lethbridge. | Barb Glen photo

By Barb Glen, the Western Producer, June 29, 2017 

If history is a guide, a higher number of herbicide resistant weeds will be discovered this year in Alberta when Agriculture Canada researchers survey the province.

Sixty percent of cropland in Western Canada has a weed resistance problem to some degree compared to 15 to 20 percent 10 to 15 years ago.

Research scientist Bob Blackshaw told those at a recent Farming Smarter field event that good weed control is an important part of avoiding herbicide resistance.

“We do want good weed control because resistance is a bit of a numbers game,” he said. “So if you have a lot of weeds in your field, you have a greater chance of that resistant gene being present.”

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