A spring of extremes — first cold, dry and windy, then hot, dry and windy — has resulted in weeds getting a head start in many soybean fields in the soybean-growing areas of Western Canada. While wind and cold temperatures delayed burnoff applications at the start of the season, questions about when to spray in… Read More
A survey that ranks the most common and troublesome weeds in 2020 was recently completed by the Weed Science Society of America (WSSA). More than 315 weed scientists from across the U.S. and Canada weighed in on seven categories of grass crops, covering weeds found in corn, rice, sorghum, turf, spring cereal grains, winter cereal… Read More
Resistance to Group 2 herbicides has been common and assumed in many cases with kochia in Western Canada for years, but weed survey results show glyphosate (Group 9) resistance in the invasive tumbleweed species has exploded in recent years. In 2013, less than 1 per cent of kochia populations sampled by Agriculture and Agri-Food Canada… Read More
Kochia is one of the first weeds to emerge in spring. There are reports that 80 per cent of the kochia population emerges before anything else in a field. The fact that it emerges so early puts a lot of pressure on the pre-emergent herbicide options out there. In this Wheat School episode, Kara Oosterhuis… Read More
Kochia is a big concern for farmers across the Prairies, primarily because it’s a tough weed to kill, and the population is rife with herbicide resistance. Most farmers are aware of Group 2 resistance — which is old news — but newer Group 9 resistance is cropping up, which further complicates control of this prolific… Read More
All the “knee-high by the first (or fourth) of July” photos have been posted on social media, with the crop looking nice from above; but what’s going on below the canopy? Now is the time to check weed populations and assess herbicide performance, says Jeanette Gaultier, senior technical services specialist with BASF, joining us for… Read More
A new product is on the market by Gowan Canada offering weed control in canola, lentils and other broadleaf crops. Edge MicroActiv herbicide contains the active ingredient ethalfluralin — a Group 3 mode of action herbicide that controls weeds, including kochia and wild oat. “Edge MicroActiv provides canola, pea, and lentil growers an opportunity to… Read More
Even if you don’t think you have herbicide resistant weeds in your fields, the best management practice might be to treat your fields as if you do. That’s the advice of Linda Hall, associate professor in the Faculty of Agriculture Life and Environmental Science at University of Alberta, in this episode of the Resistance Management School. There… Read More
Kochia is known for being an aggressive, adaptive weed. This year showed some farmers just how tenacious this species is. At spray timing, at harvest, and even after, kochia is a constant issue, and it’s not going away any time soon. Jason Lindgren, with NuFarm Canada, says that lighter competition this year due to dry… Read More
Highly competitive crops that make it difficult for weeds to gain a foothold in fields play a key role in effective herbicide resistance management. One way to make your crop more competitive is to increase seeding rates to produce higher plant populations. In this episode of RealAgriculture’s Resistance Management School, University of Manitoba weed scientist… Read More
All farmers hate weeds. Especially weeds that are hard to kill. Weeds are yield-robbing nuisances that compete for valuable space in and out of the seed row. Some weeds are fairly easy to deal with and only create limited stress. But then there are those that seem to create havoc every year because they are so… Read More
Glyphosate-resistant kochia has started showing up in more of Western Canada, and as with other cases of resistance, it’s becoming evident you can’t rely on a single tool for too long. Minimizing resistant weed populations requires an integrated or diverse approach. The crop itself must help make survival difficult for potentially resistant weed seedlings, explains Rob… Read More
It’s worrisome, though not terribly surprising, that Manitoba Agriculture, Food and Rural Development (MAFRD) announced today confirmed glyphosate resistant kochia biotypes were found in the province. MAFRD jointly conducted a kochia survey across Manitoba in the fall of 2013, in conjunction with Agriculture and Agri-Food Canada (the Saskatoon Research Centre) and the University of Manitoba,… Read More
You may have heard once or twice the terms “C3” or “C4” plants. Generally speaking, most of our crops and plants in Western Canada are C3. C3 plants are usually what you see growing in our fields, including wheat, canola, lentils, peas and barley. These plants are known as cool season crops and will yield… Read More
If ever we needed a new curse word, let me humbly suggest kochia. If you thought it was tough to kill before, it’s quickly becoming even more difficult. As Clark Brenzil, provincial weed specialist with Saskatchewan Ministry of Agriculture, explains, not only should kochia be taken off the label of every Group 2 herbicide, it’s… Read More