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
Biology is forever adapting — to tillage, to cropping systems, and to selection pressure of herbicide applications. The advent of herbicide resistance has created a huge challenge for farmers across North America. Some of the worst weeds include kochia, fleabane, wild oats, waterhemp, and Palmer amaranth. Managing these weeds and delaying more resistance requires a… Read More
Harvest weed seed control isn’t necessarily new to the agriculture industry. Farmers in Australia have been using seed control units on the backs of their combines to reduce weed seed return to the soil for several years. There are different methods to control weeds with a seed control unit — everything from cost-effective things like… Read More
Boasting “season-long” control of some major weed pests, Bayer Crop Science has announced the registration of Corvus herbicide for corn in Eastern Canada. According to the label, Corvus is effective against waterhemp, lamb’s quarters, velvetleaf, sowthistle, yellow and green foxtail, and barnyard and crab grass. Corvus offers three ways of dealing with weeds: as a… Read More
This past summer, a diligent agronomist in southern Alberta was suspicious of downy brome that was not being controlled by glyphosate. The population in question was widespread in a glyphosate-tolerant canola field in Taber County, Alberta, and was not controlled following multiple applications of glyphosate, says Charles Geddes, weed scientist at Agriculture and Agri-Food Canada,… Read More
Lentils are one of those crops that can be difficult to keep free of weeds. Lentils are a poor competitor with weeds not just as seedlings, but throughout the growing season, as well. Over the past five years, the Western Applied Research Corporation (WARC), has been doing research trials that look at herbicide layering to… Read More
The escalation in the cost of crop inputs, including glyphosate and glufosinate, has some farmers looking for ways to save money. Some farmers have asked if trimming back herbicide rates is a viable option. Going in with a half rate might seem like a good idea, but in the long run it can be a… Read More
It’s time for the season finale of Ontario Diagnostic Days! The annual Ontario field crop diagnostic days held at Ridgetown, Elora, and Winchester are again virtual in 2021. On this live broadcast, University of Guelph professors Dave Hooker and Francois Tardif join host Shaun Haney to talk three hot topics that are sure to grab growers’… Read More
Stacked traits are quite common in corn and increasingly more common in soybean as well, but the concept is still quite new for the balance of Western Canada’s crop mix. Managing with stacked traits adds significant flexibility, says Bayer Crop Science trait and trait launch manager, Andrew Chisholm, and making the most of that added… Read More
It’s evolving into a rather odd year for pre-harvest weed control in parts of Western Canada as a return of some moisture has meant sprouting swaths, and monster weeds. In Ontario, an accelerated season means plenty of farmers are making the dry-down decision on edible beans this week. From pre-harvest weed control, to swapping to… Read More
Glyphosate resistant waterhemp has spread from Essex Country, Ontario, all the way to Leeds-Grenville County, nearly 700 kilometres away in just seven growing seasons. While the exact path of spread is not known, Dr. Peter Sikkema, weed management professor with the University of Guelph, says that introduction can be through wind dispersal, in livestock feed, or… Read More
The annual Ontario field crop diagnostic days held at Ridgetown, Elora, and Winchester will again go virtual in 2021. The organizing committees of these three highly successful in-field education and learning events are again partnering with crop researchers and extension, along with support from RealAgriculture and a host of sponsors to bring you a series… Read More
From fleabane, to wild oats, to kochia and Palmer amaranth, which weed is the toughest to kill on the farm? For this episode of The Agronomists, host Lyndsey Smith is joined by Mike Cowbrough, weed specialist with the Ontario Ministry of Agriculture, Food and Rural Affairs, and Tammy Jones, technical sales agronomist with Corteva AgriScience, to… Read More
Start clean, stay clean is the motto when it comes to weed control. Super dry conditions, however, can throw a wrench in the best laid plans, as soil-applied herbicides may be less effective and timing a first pass is tricker as weeds are slow to emerge. To discuss per-emerge and early season weed control on… Read More
In the pursuit of continuous learning, you’ve got to change things up every now and then. For this episode of Wheat Pete’s Word, host Peter Johnson applies that concept to weed control and fertilizer rates and placement. There’s also plenty of discussion on the tried-and-true things we know too, like the danger of apply manure… Read More
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