Search results for “waterhemp”:
The Trump Administration started the process of re-negotiating NAFTA this week. One wonders if the rapidly spreading populations of U.S. born and bred glyphosate-resistant waterhemp in Ontario will be on the agenda. The first Canadian glyphosate-resistant (GR) waterhemp was discovered in 2014 in Lambton County, Ontario. In 2015, GR waterhemp was confirmed in 40 fields […]
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Farm magazines and rural, Midwestern airwaves are full of stories and advertising for the latest herbicide-based solutions for corn and soybean fields infested with multiple, herbicide-tolerant weeds. Perhaps the most challenging is glyphosate-resistant waterhemp. In a March 29, 2017 Farm Industry News story by Willie Vogt entitled “Taking on weed resistance”, weed management experts describe […]
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According to all reports, dicamba volatilization, drift, and crop damage has markedly worsened in 2020 in Iowa, as many expected it would. Bob Hartzler, a widely respected, experienced weed scientist at Iowa State, has published a July 8, 2020 blog entitled “Dicamba 2020: What went wrong in Iowa?” For the story of how we got […]
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Hygeia Note — The below email was sent to a group of individuals on June 1, 2020 by Lou Nelms, and is posted here with his permission. Words in [brackets] were added by Hygeia for clarity. Nelms has monitored the impact of dicamba and 2,4-D use, drift, and volatilization in Illinois since the beginning of […]
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DTN Progressive Farmer reports that dicamba-resistant weeds appear to have started to crop up in the Midwest and Midsouth regions. These soy and cotton growing regions have seen a huge increase in dicamba use over the last couple of years since dicamba-resistant varieties of these crops were introduced. An estimated 60 million acres of dicamba […]
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In an experiment conducted in Missouri, researchers have identified Palmer amaranth that is resistant to six herbicides. Amaranthus palmerii is a one tough weed. When full grown, at its base, stalks can match the circumference of a man’s wrist. One plant can set over 400,000 seeds. It has a long history of herbicide resistance, and […]
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A new study published in the prestigious journal Proceedings of the National Academy of Sciences takes some of the mystery out of how aggressive weeds like Palmer amaranth and common waterhemp developed resistance to glyphosate herbicides so quickly. Researchers from Kansas State University have discovered that these pigweeds develop extra-chromosomal circular DNA (eccDNA), genetic material that […]
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Farmers are bracing for a rough season contending with the spread of glyphosate-resistant weeds throughout the Heartland. The collapsing efficacy of genetically engineered (GE), herbicide-resistant (HR) technology coincides with a serious downturn in corn, soybean, and cotton prices. Rising costs for GE-HR seed, the need to markedly intensify herbicide use (driving production costs higher), and […]
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Historical Documents Other Resources Historical Documents “Herbicide-Resistant Weed May Invade Pennsylvania Crops,” Penn State News, 2003 Other Resources Scientists try and unravel the “wicked problem” of pesticide resistance in this 2018 commentary in Science Escaped GE crops have also become pests for some American farmers, in Oregon ranchers battle against glyphosate-resistant bentgrass. It was developed for […]
