Tag Archives: herbicide resistance

Glyphosate-resistant Italian ryegrass management: Now is the time!

ryegrass

• By Daniel Stephenson and Josh Copes • Glyphosate-resistant Italian ryegrass has been an issue in the mid-South for the past 10 to 15 years. In Louisiana, growers have been battling this pest for five to 10 years, and the problem is spreading each year. Louisiana does not have ryegrass issues like Mississippi, but if control strategies are not implemented, ... Read More »

Start collecting California rice weed seeds for resistance testing

new watergrass species

It’s that time again! If you would like to submit seeds for herbicide resistance testing, many weed species will be maturing right about now. The UCCE Rice Weeds Program tests grower submitted seed samples of potentially herbicide-resistant watergrass species, sprangletop, smallflower umbrella sedge and bulrush. However, we encourage you to submit ANY species that you suspect to be resistant. We ... Read More »

Multiple herbicide resistance in barnyardgrass prompts red flag warning

jason norsworthy, rice flatsedge

• By Vicky Boyd, Editor • A grassy weed with resistance to multiple herbicides poses as big – if not a bigger – challenge to Arkansas rice growers than herbicide-resistant Palmer amaranth does to soybean and cotton producers. That was the sobering outlook University of Arkansas Weed Scientist Jason Norsworthy presented about herbicide-resistant barnyardgrass during the recent University of Arkansas ... Read More »

University of Arkansas hires new Extension weed scientist

Tommy Butts

The newest University of Arkansas System Division of Agriculture weed scientist says he expects to rack up more than a few miles of field walking as he learns more about the issues faced by Mid-South farmers. Hailing from southern Wisconsin, weed scientist Thomas Butts took his new position as Extension weed scientist on Nov. 26. He brings a diverse background, ... Read More »

Some fall-applied residuals may injure following year’s rice crop

Italian ryegrass

Although fall-applied residual herbicides are recommended to control glyphosate-resistant Italian ryegrass, some can be detrimental to the following year’s rice crop, according to recently published research. Involved in the project were Ben Lawrence, a Mississippi State University graduate student; Dr. Jason Bond, MSU weed scientist; Henry Edwards, MSU graduate student; and Dr. Bobby Golden, MSU Extension agronomist. The researchers looked ... Read More »