A field tour to look at possible glyphosate-resistant common ragweed is set for Aug. 5 near Mayville.

“This site is highly suspected of having glyphosate-resistant common ragweed,” says Jeff Stachler, North Dakota State University and University of Minnesota Extension Service sugar beet specialist. “If true, this would be the first confirmation of a glyphosate-resistant weed species in the state.”

Glyphosate is a herbicide that provides broad-spectrum weed control with excellent crop safety in glyphosate-resistant crops. It is used considerably in no-tillage cropping systems. Glyphosate is good at controlling many weed species, has no soil activity (allowing for flexible crop rotations) and has low environmental and human health risks.

Stachler is conducting research to determine the level of glyphosate resistance and how important timing of glyphosate applications will be in maximizing activity and control.

A second study of Stachler’s focuses on how to control common ragweed in sugar beets.

Rich Zollinger, NDSU Extension Service weed specialist, is working with Stachler and focusing on herbicide programs to control common ragweed in soybeans and dry beans.

The tour of the research studies will begin at 9:30 a.m. and last approximately two hours. To get to the field, take exit 111 off Interstate 29. Go four miles west on North Dakota Highway 200. Turn north and go 2.5 miles on County Road 10 (158th Avenue). The research plot is in a wheat field on the east side of the road. Parking is available only along the side of the road.

In case of inclement weather, the tour will be canceled or postponed. If inclement weather does occur, contact Stachler at (701) 231-8131, Mohamed Khan at (701) 231-8596 or Kendall Nichols at (701) 636-5665.

NDSU Agriculture Communication