In light of dicamba drift issues, Dr. Steckel recommends using a PPO herbicide as a follow-up application in Xtend soybeans. Recent research has found that a sequential PPO application is very effective in controlling Palmer amaranth that survives an earlier dicamba application. Watch as he walks you through the study. Herbicide Resistance Info
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University of Tennessee Weed Specialist Dr. Larry Steckel discusses the difference between herbicide volatility and temperature inversion as causes of herbicide drift.
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Reminder from Dr. Larry Steckel to watch for temperature inversions when spraying dicamba herbicides in late-planted soybeans.
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Three new soybean herbicide systems will give Louisiana farmers much-needed tools to fight increasing resistant weed populations they have struggled with in recent years. However, LSU AgCenter weed scientists caution that the new products, which they have been evaluating in field trials, will only be helpful long term if applied according to label and in
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There is obviously a lot going on with the dicamba issue, resulting in uncertainty as to where exactly we are headed with regard to future labels, restrictions, and stewardship. However, we are fairly confident that the label for early-season use of dicamba in preplant/premeergence burndown programs will be preserved into next year at least (“dicamba”
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As we enter the fall harvest, many will be evaluating what soybean variety to select for next year. No longer is the focus solely on yield and tolerances to disease, iron chlorosis, and nematodes. This fall, farmers, consultants and advisors will be asking questions regarding how label modifications, if any, to the newly introduced dicamba
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Farmers and applicators often ask whether the temperature of the mixing water influences herbicide product performance. Water collected from surface sources (such as lakes and ponds) and groundwater are commonly stored in poly-tanks for hours or even several days before applicators pump it into spray tanks to mix with herbicides. In the United States, groundwater
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Fall burndown applications haven’t ranked as high on the priority list in the South as in parts of the Midwest. But to a degree, farmers in the Cotton Belt are taking the practice more to heart, working it into their plans – and their budgets. That may be especially true in flatter areas in the
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No official pesticide drift complaints have been reported to the Georgia Department of Agriculture this year due to in-season applications of dicamba, or 2,4-D. Sound science and assistance from University of Georgia Cooperative Extension agents led to Georgia farmers’ success in using dicamba technology in cotton and soybeans, according to UGA Extension weed specialist Stanley
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Many reports have circulated the US concerning widespread dicamba injury to off-target crops, particularly in the Mid-South and Midwest. According to a national survey led by Kevin Bradley, weed scientist at the University of Missouri, 3.1 million acres of crops were reported injured by dicamba in 2017, which was legally applied to dicamba-resistant soybeans for
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Dicamba tolerant cotton and soybean varieties were brought to the market in 2015 and 2016, respectively, and were followed in 2017 by the newly registered dicamba herbicides formulated specifically to have lower volatility. Following a challenging launch in 2017 of these newly registered herbicides in some states, the EPA worked with companies registering the new
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At the recent North Central Weed Science Society annual meeting I was asked to provide the opening presentation (A historical perspective on dicamba) in a symposium focusing on issues with dicamba. Below are the slides and the abstract of my presentation. Powerpoint presentation pdf The auxin-like activity of the phenoxyacetic and benzoic acids was discovered in the early-1940’s. The herbicide dicamba
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Recent issues with dicamba spray drift have highlighted the need for producers to understand third-party liability associated with all herbicide applications, said University of Missouri Extension economist Ray Massey. Massey presented information about liability risks related to herbicide application at MU Extension’s annual Crop Management Conference in late 2017 in Columbia. “It’s always important that
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One question I was asked recently had to do with Restricted Use Products (RUP) and dicamba. In Minnesota, Fexapan, Engenia and XtendiMax are currently the only restricted use dicamba products in the state. The RUP designation requires the applicators to be certified; i.e. possess either a private applicators certification or a commercial/noncommercial pesticide applicators license.
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In response to problems with off-target movement and injury associated with dicamba applications on dicamba-resistant (Xtend) soybean, the EPA made significant changes to labels of the new dicamba products. While much of the discussion has focused on the Restricted Use designation and the requirement for applicators to receive dicamba-specific training, the EPA also clarified how
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While cotton and soybean producers across Texas are getting the do’s and don’ts for applying new chemical formulations to their crop, the education is being extended to producers with sensitive or susceptible crops to protect their investments. Texas A&M AgriLife Extension Service personnel have more than 70 meetings planned to train producers on working with
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New Crops and their corresponding Label Updates: Roundup Ready 2 Xtend soybean Engenia 5L (dicamba-BAPMA salt; BASF), Xtendimax 2.9L (dicamba-DGA with Vapor Grip Technology; Monsanto) and FeXapan 2.9L (dicamba-DGA plus Vapor Grip Technology; DowDuPont) are currently the only three herbicides that are allowed to be used in Roundup Ready 2 Xtend (dicamba-tolerant) soybeans. Each of
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