Category Archives: Weeds

Identification of PPO-Resistant Palmer Amaranth

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Identification of PPO-resistant Palmer amaranth has been a concern for many over the past couple of weeks. I am sure many of the Palmer amaranth escapes in West Tennessee are not due to resistance.  However some definitely are.  We are up to 4 counties now where the Palmer amaranth with the PPO-resistant gene has been identified. So how can one tell if Palmer amaranth that escapes FlexStar, Ultra Blazer or Cobra is due to resistance or another issue? Continue reading


Cotton Progress/Heat Unit Accumulation for 2015

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A rough start for many of TN’s cotton acres has turned into a decent summer for the majority of our acreage.  This is very evident when looking at accumulated heat units noted at the West Tennessee Research and Education Center in Jackson, TN.  As you can see in the below graph, we are quite a bit ahead of the last two years on accumulated heat units.  Warm temperatures in mid/late June and timely rains have Continue reading