Category Archives: Weeds

UT Cotton Scout School (Friday, May 27, 2022)

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The UT Cotton Scout School is scheduled for the last Friday of the month, May 27th, at the West Tennessee Research and Education Center (605 Airways Blvd, Jackson). There is no fee, and preregistration is not required. Registration begins at 8:00 AM with the program starting at 8:30. Content will include classroom and hands-on training with an optional go-to-the-field session after lunch. Topics covered will include cotton development and identification and symptoms of insect pests, plant diseases, and weeds.


Poor Burndown Performance

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There have been a number of reports on disappointing burndown applications that were applied during that cold stretch, 3 to 4 weeks ago, when nighttime temperatures were in the 20s.  The herbicides that performed poorly were some combination of systemic herbicides glyphosate, dicamba, clethodim and Leadoff. Continue reading


Burndown Wild Garlic, Grape Hyacinth and Star-of-Bethlehem

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Picture 1. Blue flowers distinguish grape hyacinth from wild garlic

This spring some fields seem to be infested more heavily with wild garlic, grape hyacinth and in a few cases, star-of-Bethlehem. These three weeds, in the Lily family, are often mistaken for each other as they all derive from bulbs and are low-growing perennials. Continue reading


Strategies for Overlapping Residuals in Cotton

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Overlapping residual herbicides for Palmer amaranth control will be essential in 2022.  There are two main reasons for this.  First is the continued evolution of dicamba-resistant Palmer amaranth in Tennessee.  Our most recent greenhouse screens clearly show that some populations have upped their game with respect to their dicamba resistance from what was seen in 2020 or 2021.  Second, the lack of Liberty supply greatly limits the last best option to remove Palmer amaranth in-crop that is dicamba resistant. Continue reading


Burndown Time in Tennessee

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It is now “burndown time in Tennessee.”  The combination of supply chain issues with the ever-increasing presence of herbicide resistant weeds has made burndown time more of a challenge in 2022. Poa and ryegrass are two very common grass weeds and are of most concern, particularly before corn planting. Continue reading