Ontario Agriculture

The network for agriculture in Ontario, Canada

Field bindweed is an aggressive perennial weed that reduces crop yield and slows harvesting speed especially in soybeans and cereals. Eradication is impossible, but minimizing its impact in field crops is possible with a management strategy that includes a fall application of glyphosate at 1.5 L/ac (360 g/L concentration). The photo below was taken in late May of 2004 and compares field bindweed populations in the untreated area (right) versus a late September application of glyphosate (left).The previous fall a number of different tillage and herbicide treatments were applied to field bindweed that had regrown in this field after winter wheat harvest. The next spring, field bindweed first emerged at high densities in the areas of the field that were left untreated the previous fall. Where glyphosate had been applied the previous fall at 1.5 L/ac (360 g/L) field bindweed emerged much later (about the 7-8 leaf stage of corn),at significantly lower densities compared to the untreated areas and with minimal impact to the corn crop.

Unfortunately, one fall glyphosate application isn't going to have a long term impact. After all, we are dealing with a species with a very extensive underground root system that allows it to bounce back quickly. However, a management stratgey that incorporates fall glyphosate applications, with cover crops (i.e. underseeded red clover) and in-crop treatments that remove field bindweed top growth (through effective herbicides or tillage) will go a long way to minimizing the impact of this creeping perennial. To search for effective in-crop herbicide options for field bindweed in corn, go to www.weedpro75.com A big thanks to Peter Smith and Dr. François Tardif (University of Guelph) for collaborating on this project.

Views: 1239

Comment

You need to be a member of Ontario Agriculture to add comments!

Join Ontario Agriculture

Comment by Mike Cowbrough on October 6, 2009 at 1:33am
John, my experience has been that banvel or 2,4-D certainly won't decrease the activity of glyhosate and bindweed will show visual injury symptoms quicker than glyphosate alone. However, when you take a look next spring, you would be hard pressed to notice the difference between adding those herbicides versus leaving them out of the tank.
Comment by John Beardsley on October 5, 2009 at 5:06pm
what about .15l/ac banvel and .15l/ac 2,4-d ester?
Comment by OntAG Admin on October 5, 2009 at 2:01pm
Thanks Mike: Good advice for fall scouting and control.

Here is the latest video from Peter Gredig on his weed control strategy for one of his field.

Click the link to watch the field video report.



http://www.eHarvest.com/default.aspx?vid=vid_11212008050346069

Agriculture Headlines from Farms.com Canada East News - click on title for full story

SaskOilseeds October Newsletter

Closing out the 2026 growing season With harvest nearing completion across Saskatchewan, canola and flax acres are among those still coming off the field. As of October 19, canola harvest was 96 per cent complete provincially, while flax was 88 per cent complete. Provincial yield estimates currently sit at 40 bu./ac. for canola and 26 bu./ac. for flax. Rain and snow slowed harvest and fall field work in many areas earlier this month, but the added moisture was beneficial for harvested acres heading into winter. Post-Harvest Storage & Agronomy Protect Your Harvest: Oilseed Storage A lot of work goes into getting a crop from the field to the bin, and every season looks a little different. These resources can help maintain quality in storage: Conditioning Tips for Stored Canola Factors that Increase Canola Storage Risk Tips for Drying Damp and Tough Canola Flax Harvest Preparing for Next Season Canola Disease Testing: Submit canola stem samples by October 30. Blackleg and verticilliu

Canadian Centre for Rural and Agricultural Health celebrates milestone 40th anniversary

The Canadian Centre for Rural and Agricultural Health (CCRAH) began more than four decades ago for a simple reason: to support the health and safety of rural and agricultural people in Saskatchewan. “Saskatchewan is the breadbasket of Canada. Agriculture and rural are what make Saskatchewan,” said Dr. Shelley Kirychuk (PhD), the current director of CCRAH. “We are rural, we represent agriculture, and we support the people that bring food to the world.” Where it started In the 1970s and ’80s, a phenomenon was noticed by Dr. James Dosman (MD), the eventual founding director of CCRAH. People who worked in grain elevators were reporting lung health issues due to grain dust exposure. These findings led to an International Symposium on Grain Dust and Health in the late ’70s, which eventually led to the development of a national grain dust medical surveillance program for Canada. From there, USask and the Saskatchewan Lung Association established the Centre for Agricultural Medicine in Ja

USask soil science class partners with Wanuskewin on restoration project

That was Jessica Gunn’s mantra when she put on waders and climbed chest-deep into the cool water of the opimihaw Creek at Wanuskewin Heritage Park in mid-September. Gunn was there with a group of University of Saskatchewan (USask) students who were engaging in a unique learning experience: constructing a beaver dam analog (BDA) in the creek. “A big part of why I wanted to do this course is because it’s so hands-on,” said Gunn, a third-year renewable resource management student who enrolled in SLSC 450.3: Practical and Applied Restoration, a soil science course taught by Dr. Katherine Stewart (PhD), an associate professor in USask’s College of Agriculture and Bioresources. For Gunn, the day at Wanuskewin was unlike any other school day she had experienced. “We had a great time as a class,” she said. “I feel like we learned so much.” The students were invited to Wanuskewin to help the park build a BDA — essentially a “starter” dam that beavers can take over and use to construct their

U.S. Canola Use Forecast to Jump 16% in 2026-27

U.S. canola use is forecast to climb sharply in the 2026-27 marketing year, supported by record domestic production, expanding crush capacity and rising demand for canola oil in biofuel manufacturing. According to the USDA's latest Oil Crops Outlook, total U.S. canola usage is projected to increase 16% from 2025-26, while domestic crushing is expected to rise 11% to 2.4 million tonnes. The stronger crush outlook reflects growing domestic demand for canola oil and meal, which has supported processing margins. A new crushing facility is also expected to be completed during 2026-27, adding to U.S. processing capacity. Meanwhile, U.S. canola oil use in biofuel production is forecast to surge to 2.54 million tonnes, up from 1.68 million tonnes last year, an increase of more than 50%. The USDA attributed the growth partly to stronger renewable fuel mandates for 2026 and 2027, along with new eligibility for the 45Z clean fuel production tax credit for biomass-based diesel made from No

Protect Grain Quality During Wet Harvests

Wet harvest conditions can increase the risk of OTA development in stored grains. Proper drying, cooling, cleaning, and monitoring help protect crop quality and value.

© 2026   Created by Darren Marsland.   Powered by

Badges  |  Report an Issue  |  Terms of Service