Weeds

Wild oat head

Over 50% of Alberta fields have herbicide resistant wild oats

Wild oat resistance has increased over three surveys conducted since 2001. In surveyed fields where wild oats were found, Group 1 wild oat resistance increased in Alberta from 11% in 2001 to 58% in 2017. In 2017, 247 fields were randomly surveyed across Alberta prior…

wild oat panicles

Triallate-resistant wild oats also cross resistant to four other Groups

Herbicide screening studies on triallate-resistant (Group 8) wild oats found cross-resistance to Group 1 and Group 2 herbicides. Additionally, unexpected resistance to Group 14 and Group 15 herbicides was found even though the wild oats had never been previously exposed to these herbicides. Two relatively…

Lentil field

Apply Clearfield lentil herbicides at the five to six node stage

The critical weed free period for lentil starts at the five-node stage and lasts until the 10-node stage. Research found that applying Clearfield herbicides to lentils at the five- to six-node stage provided the best weed control and highest yield. Two research studies conducted at…

wild oat in tame oat

Improving tame oat competitiveness with wild oat

Seed 35 seeds per square foot and apply at least 13.4 lbs. P205 per acre to improve wild oat competitiveness and increase tame oat yield. A three-year study was conducted at Agriculture and Agri-Food Canada Indian Head to determine if side-banded phosphorus (P) in combination…

combine wheat header

Diverse crop rotations return up to $45 per acre more

Diverse crop rotations had similar net returns to canola-wheat rotations one-half the time and up to $45 per acre more the rest of the time. Adding integrated weed management practices without relying on wild oat herbicides resulted in similar wild oat pressure as canola-wheat rotations….

wild oat

Our Top 10 herbicide-resistant weed management practices

Agriculture and Agri-Food Canada research scientists Hugh J. Beckie and K Neil Harker identified herbicide-resistant weed management practices that have the most impact on managing herbicide selection pressure. Their top 10 management practices are based on research and growers’ experiences over the last 30 years.