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: 839

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 8:33am
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 6, 2009 at 12:06am
what about .15l/ac banvel and .15l/ac 2,4-d ester?
Comment by OntAG Admin on October 5, 2009 at 9:01pm
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

Liberals address promises for farmers and rural Ontario

Ontarians head to the polls on June 2

SECURE, SUSTAINABLE, AFFORDABLE

The Choose Canadian Seafood Task Force, a program led by the Canadian Aquaculture Industry Alliance (CAIA) and The Fisheries Council of Canada (FCC) today announced the launch of a new, national awareness campaign aimed at encouraging consumers to choose Canadian seafood more often.

On-off grazing

On-off grazing is a management technique to minimize damage while grazing wet pastures. It is an alternative to using a sacrifice paddock.

Alfalfa Weevil

Alfalfa weevil can be an issue in Ontario, particularly in south-western parts of the province. While outbreaks tend to be isolated, they can be severe and dramatically reduce forage yield and quality.

Canadian Centre for Food Integrity Elects New Directors

The Canadian Centre for Food Integrity (CCFI) is pleased to announce the election of three new directors to its Board of Directors.

© 2022   Created by Darren Marsland.   Powered by

Badges  |  Report an Issue  |  Terms of Service