It was only a matter of time before Palmer amaranth was found on a farm in Ontario. Although technically it was found back in 2007 along a rail line outside of Niagara Falls, surveillance of that area in the years following have never detected any plants since the initial finding. In late summer, an individual […]
Co-authored by Mike Cowbrough, OMAFRA Weed Management Specialist – Field Crops An annual ryegrass cover crop is excellent at scavenging nitrogen, improving soil structure, and preventing erosion. It tolerates low light levels well enough to be inter-seeded into an established corn crop and grows quickly enough with adequate moisture to help suppress weeds. For ruminant […]
This article is based on work performed by Mike Schryver, BASF Technical Service Specialist. It was originally published at Sprayers101.com, and you may have been redirected here from that site. Introduction Nitrogen is an essential nutrient required throughout a plant’s lifecycle. It is commonly applied to corn in either a granular form as urea or […]
All of OMAFRA’s pest management publications have been digitized into the Crop Protection Hub. While we have received positive feedback on this tool, we do understand that some prefer the print publications. We are working on a print solution from the Crop Protection Hub that we hope meets those needs. If you would like to […]
Bluegrass competition in winter wheat can result in yield losses of up to 50%. We reviewed current research to provide recommendations for reliable control of annual and roughstalk bluegrass in Ontario. […]
Reduced supply and increased costs of glyphosate have prompted many to reevaluate how they use this herbicide. The following three questions are most common: […]
This post provides an overview of the research that has been done in Ontario to evaluate the control of phragmites with herbicides. […]
An invasive perennial weed from the milkweed family, dog strangling vine, is extremely difficult to control once it gets established (Figure 1). Progress has been made on biological control of this weed in Ontario through the release of Hypena opulenta, a leaf feeding caterpillar. However, integrated strategies that include both biological and chemical methods […]
A pre-harvest herbicide treatment can make harvest more efficient when there are an unacceptable number of weeds in a soybean crop. Both conventional and glyphosate tolerant fields that are weedy can benefit from a pre-harvest herbicide. Drier plant matter will pass more easily through the combine, lowering seed losses and reducing seed staining… […]
This post will serve as a repository for all information associated with the management and control of waterhemp in Ontario. […]
Each year I get more questions about mixing the liquid fertilizer, ammonium thiosulphate (ATS) with herbicides. With reductions in atmospheric Sulphur deposits, Ontario research has shown positive yield responses in some crops when Sulphur fertilizers are applied and so it makes sense that farmers are looking at ways to add Sulphur to their crop in […]
Scentless chamomile has a reputation for being difficult to control and a 2019 on-farm research trial evaluated several herbicide treatments. Although 10 treatments provided over 80% visual control of emerged plants, new seedlings continued to emerge several weeks after application resulting in a significant amount of plants at the end of August. In order to […]
The following link will take you to a .pdf version of the wild carrot chapter from the book entitled “Problem Weed Guide for Ontario Crops – Volume 1” […]
“Do not be cheap. Weed control is an investment into the current and future crops on every field.” That was parting advice from Norfolk and Oxford County farmer Ann Vermeersch at the 2019 FarmSmart Conference in Guelph. In front of 80 farmers and agronomists, I moderated a session with Vermeersch and Steph Kowalski, a […]