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Here is your latest issue of AgFax Weed Solutions, sponsored by Nufarm's Midwestern and Southern field teams.
 
Web Editor: Ernst Undesser

IN THIS ISSUE

  • Tank Mixing - 8 Steps Towards Getting It Right
  • Iowa Soybeans: Achieving Full-Season Waterhemp Control
  • Georgia Cotton: Beware Of Even More Intense Herbicide Resistance
  • Glyphosate-Resistant Pigweed - 14 Years And Counting
  • Pennsylvania Corn And Soybean Weed Control - What's New For 2019?
  • Kansas: Herbicide-Resistant Kochia - What's Known And Unknown
  • Ohio: The LL-GT27 Soybean - What's Legal To Spray And When?
  • Weed Control: A New Generation Of Scientists, Technology, Ideas
  • Higher Soybean Seeding Rates: Making The Case For Weed Suppression
  • Resistant Pigweed - A New Frontier Opens As It Spreads Way Out Of The South
  • Waterhemp Becomes World's First Broadleaf To Dodge Group 15 Herbicides
  • Palmer Pigweed Now Resides in 39 States - Who Would Have Thought?
  • Georgia Peanuts: Yellow Nutsedge Population Tests Positive For Cadre Resistance - First Ever
A mixing mishap – and there are plenty of banana peels to slip on – can be costly, lead to weed escapes and create further herbicide-resistant populations into the future. Here are 8 steps to improve tank mixing success, including some points that you might not have considered until now. With herbicide resistance spreading, tank mixing is the new norm.
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The layered residual system is one of the best ways to reduce late-season waterhemp escapes in soybean. But timing and herbicide selecton are critical factors if you want to prevent escapes.
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Weed Scientist Stanley Culpepper emphasizes the importance of protecting Georgia farms from herbicide resistance, but says the immediate and major issue facing farmers is resistance to Protoporphyrinogen Oxidase (PPO) herbicides, which is now quite common in the mid-south.
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Georgia was ground zero for Roundup-resistant Palmer pigweed. As one key weed scientists there says, “We’ve now spent nearly two decades with glyphosate-resistance in this weed. It’s still ubiquitous here. But our weed control programs are doing a pretty good job now.”
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New chemistries are still not available but manufacturers continue to roll out new combinations and pre-mixes of herbicides that already are in play. Here's a quick overview on new products.
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Researchers from two universities have scoured journals and research data bases to pinpoint situations where you can expect kochia to build herbicide resistance. Plenty, though, remains to be known.
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The LL-GT27 soybean – with resistance to glyphosate, glufosinate, and isoxaflutole (Balance) – offers a promising package. However, there’s no label for the use of isoxaflutole on this soybean, at least at the moment. So, what are your herbicide options if you plant it?
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Call it hope for the future…a promising group of students showcased insightful research projects at the 2019 Weed Science Society of America conference. They are already versed in the new technology – with both an understanding of its promise and problems – plus, the understand the world of modern communications through social media and all its various components.
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“Due to the spread of herbicide resistance, weed management is no longer simple. Alternative tactics are needed, and one relatively easy tactic to adopt is enhanced crop competition. Row spacing, planting density, cultivar characteristics and row orientation all influence how well a crop suppresses weeds.”
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Although they don’t quite have the long history and experience of their battle-hardened Southern neighbors, a group of outlying states are staring down Palmer amaranth populations with some of the most challenging herbicide-resistant traits in the country. As pictures go, it ain't a pretty one.
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Waterhemp resistant to Group 15 herbicides (very long chain fatty acid inhibitors) has officially been found in Illinois research plots. It is the first dicot broadleaf weed in the world to outmaneuver herbicides within the Group 15 chemical family.
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What does it really mean for a state to have Palmer amaranth? What herbicide-resistant traits has it carried on its journey, and how do farmers manage it in the widely farflung and varying landscapes of the U.S.?
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Resistance has been found in a single dryland field where Cadre was applied 5 years in a row, which is an unusual situation in Georgia where peanuts are regularly rotated with cotton or corn to minimize disease risks. Whether this has somehow been dispersed to other fields remains to be seen.
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