There’s no doubt that much of the rapid increase in no-tilled acres over the past 20 years is due to the extensive use of glyphosate-resistant corn and soybeans. Yet, extensive reliance on this single herbicide mode of action may be holding back the future growth of no-till. Even more worrisome is the impact it could have on simply maintaining the no-till acres we already have.
From May 16th, 2013 - June 15th, 2013, we asked No-Till Farmer readers: "How many species of glyphosate-resistant weeds do you believe are present on your farm?"
University of Nebraska-Lincoln greenhouse studies have confirmed glyphosate resistance in common waterhemp from six Nebraska counties: Antelope, Dodge, Lancaster, Pawnee, Seward, and Washington.
Source: Travis Legleiter and Bill Johnson, Pest & Crops, Purdue Cooperative Service
There was living, green, marestail and ragweed plants sticking up in the wheat stubble, getting ready to take full advantage of the newly opened canopy and much younger soybean seedlings soon to emerge.
With hundreds of no-tillers looking on, Bryan Young showed no-tillers last winter some PowerPoint slides that spelled out a troubling end game: In state after state, glyphosate-resistant weeds have been winning the battle for crop acres.
During a symposium on glyphosate-resistant weeds held during the annual early winter meeting of the North Central Weed Science Society in St. Louis, Mo., university researchers confirmed the development of glyphosate-resistant waterhemp.
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On this episode of Conservation Ag Update, brought to you by Martin-Till, Brian and Darren Hefty, fourth-generation farmers and hosts of Ag PhD, share tips for treating tar spot in corn.
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