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
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
There has been some discussion about how to manage Palmer amaranth next year in light of the likely PPO-resistant Palmer amaranth in the picture in some fields. Continue reading
Timely applications of recommended rates of Flexstar did not control Palmer amaranth in two fields in West Tennessee. Continue reading
The remaining Soybean Scout School is scheduled for 9:30 AM in Robertson County (see below). Scout Schools are 2-2.5 hour, field-side programs about the nuts and bolts of soybean growth and pest management. They are sponsored in part by the Tennessee Soybean Promotion Board and the USB. Scouting notebooks and sweep nets will be provided to participants while supplies last. Continue reading
This has proven to be a very challenging year to manage Palmer amaranth. Continue reading
Tennessee cotton is finally ‘growing off’. Still, here on the 3rd day of July, it appears few farms will reach the coveted ‘bloom by the 4th’. Although the environment has played a dominate role in maturity up to this point, management decisions emphasizing earliness have been particularly useful in 2015. This marks the third consecutive year in which managing for earliness has a marked effect on crop maturity by early July. 
On the heels of last year’s delayed crop, Dr. Owen Gwathmey and I began discussing potential benefits of managing a cotton crop for earliness and the management practices which encourage timely maturity and harvest with colleagues both within and beyond the University of Tennessee. We have summarized these thoughts in the attached Guide to Earliness Management in Short-season Cotton Production (PB1830). Continue reading
Managing PPO herbicide Time of Day Effect on Palmer Amaranth with Garret Montgomery Continue reading
