There are plenty of weedy corn fields across Ontario as a planting season with weather-induced stops and starts has some growers struggling to get crop in the ground and also stay ahead of the weeds. Getting the jump on those weeds, especially in fields relying on post-emergent herbicide programs is critical, says University of Guelph… Read More
Tag: Dr Peter Sikkema
Glyphosate resistance has been confirmed in lamb’s-quarters in Quebec. The finding, which comes from the CÉROM grain research centre, is the first confirmation of glyphosate resistance in the annual weed anywhere in the world. University of Guelph research scientist Dr. Peter Sikkema shared the news with those attending the Ag Business Breakfast Meeting at Ridgetown,… Read More
Weeds can cause up to 58 per cent yield loss in edible beans compared to 50 per cent in corn and 35 in soybeans. That’s just one brick in a wall of weed control insights University of Guelph weed science researcher Dr. Peter Sikkema has accumulated over a 30-year career that includes induction into the… Read More
Common ragweed’s ability to resist the control efforts of different herbicide groups continues to grow across Ontario. Last winter, University of Guelph weed scientist Dr. Peter Sikkema confirmed the presence of Group 14 resistance in common ragweed, making the broadleaf pest resistant to enzyme inhibitors, including branded weed control products such as Reflex and Blazer,… Read More
A widespread rain sweeping across Ontario this past weekend provided plenty of moisture to activate soil-applied, pre-plant herbicides in crop fields throughout the province. With the timely rain, many growers are now asking: after activation do these herbicides have the capability to ‘reach back’ and control already-emerged weeds and grasses such as foxtail? University of… Read More
Glyphosate-resistant Canada fleabane was first confirmed in Ontario in 2010. Fast-forward thirteen years and the weed now has developed resistance to multiple herbicide groups and can be found in Essex County, bordering Michigan, all the way east to Glengarry County, adjacent to the Quebec border. University of Guelph weed scientist Dr. Peter Sikkema has been… Read More
Waterhemp, the invading resistant weed, often misidentified as redroot, green, or smooth pigweed, continues to build resistance against herbicide control in Ontario. University of Guelph weed scientist Dr. Peter Sikkema and his research team have now confirmed waterhemp resistance to Group 27 herbicides in the province. He shared the news earlier this week during a Ridgetown/Simcoe… Read More
Glyphosate supply has been a hot topic this winter as growers look for ways to navigate through short supplies of this critical weed control tool. On this episode of RealAgriculture’s Soybean School, University of Guelph weed scientist Dr. Peter Sikkema joins Bernard Tobin to discuss best practices and strategies to help growers make the most of… Read More
When glyphosate-resistant waterhemp was first discovered in Lambton County in 2014, University of Guelph weed scientist Peter Sikkema never imagined the course the weed would take across Ontario, or the speed it would travel. Fast forward to 2022 and glyphosate-resistant waterhemp has moved 700 kilometres east to Leeds & Grenville County. The invading resistant weed, often… Read More
It’s time for agronomy hot topics on Day 4 of Ontario Diagnostic Days! The annual Ontario field crop diagnostic days held at Ridgetown, Elora, and Winchester are again virtual in 2021. Crop nutrition, weed control and planting depth and timing are the focus of this episode. We kick it off with Ontario Ministry of Agriculture, Food… Read More