Category Archives: Weeds

Results of the 2019 Palmer amaranth Dicamba Screen

Response of Palmer amaranth to 0.5 lbs/A of Dicamba: 2001 collected seed Left and 2019 collected seed Right. 11 days after application

In 2019 we ran calls on about 40 fields where producers were disappointed with their Palmer amaranth control from applications of Engenia or XtendiMax. We collected Palmer amaranth seed last fall from 22 of these fields where it looked like the Palmer had survived timely application(s) of dicamba. Subsequently, we were able to get a critical mass of seed to germinate from 12 of these collections in order to evaluate plants for possible dicamba tolerance in three separate greenhouse screens conducted throughout the winter months. Continue reading

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Call of the Week: Prepping for 2020 Weed Management

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Dr. Larry Steckel’s top call this week has been questions about preemergent herbicides for grass control. In this episode he provides his recommendations. He also provides an overview of weed control trends and technology discussed at the recent Weed Science Society of America conference. Play podcast. Continue reading

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New Thoughts on Pre-Emergence Options in Cotton

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Goosegrass Escapes after two applications of Roundup PM + Engenia

Clearly, after all the struggles in 2019 controlling grass weeds, many are looking to change their weed management program. The most frequent question recently has been on the best pre emergent (PRE) options to more account for barnyardgrass, jungle rice and goosegrass. Continue reading

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New Thoughts on Burndown Strategy

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Junglerice escaping glyphosate plus dicamba burndown in Titpon county TN 2019

For the last two decades dicamba has been used extensively as a pre plant burndown on almost all Tennessee cotton and soybean acres. It was often used at 8 to 12 oz/A of a Clarity-type product 14 days before planting. I know it has become tradition to use it in this fashion, but I believe this should be changed for three reasons. Continue reading

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