Some of the earlier planted cotton fields are entering the true “laying it by” application timing. Given the continued reports of Palmer amaranth, prickly sida, barnyardgrass, junglerice and goosegrass escaping glyphosate + dicamba applications going back to an “old school” layby is a good plan.
Some reports have come from folks concerned by the lack of Palmer amaranth response to applications of dicamba plus glyphosate applied in the last 10 days. I expect to get more of these calls as I have seen similar results in our research this spring. Continue reading
Due to little time and very few good spray days some corn fields have yet to have their lay-by application. Corn is putting on a new leaf every 3 days with all the heat and water. Therefore time is short before it will be too mature to apply any herbicide safely over the top.
The most asked question “is how large can corn be before glyphosate could potentially cause injury”? The glyphosate label states it can be applied up through the V8 corn growth stage. My experience has been if glyphosate is applied to corn larger than that it can at times cause ears to be barren. This phenomena is difficult to predict ahead of time as it can vary due to maturity of the corn at application, hybrid and weather. Continue reading
As most know by now, on June 3rd the U.S. Court of Appeals for the 9th Circuit vacated the labels for XtendiMax, FeXapan and Engenia. The question since is how do we proceed from here controlling weeds in Xtend cotton and soybean?
The folks at the Tennessee Department of Agriculture (TDA) have stated that until they get direction from the Environmental Protection Agency to the contrary, growers can still apply those herbicides according to the label directions. How long this will be is uncertain. It could be just a day, several weeks or depending upon legal maneuvers, well into July. Continue reading
In this podcast, Dr. Larry Steckel’s top call for this week has been assessing chemical injury to young cotton plants. That’s thanks to weather and soil conditions when many post-emergence herbicide applications were made. Dr. Steckel will discuss what to do next and how to mitigate chemical burn going forward. He’ll also discuss glyphosate-resistant johnsongrass. Listen.
Below please find a link to the recorded zoom training for the 2020 UT Cotton Scout School. It is a rather lengthy training, but you can fast forward and rewind at your discretion.
http://www.utcrops.com/BlogStuff/2020-UT_CottonScoutSchool.mp4
Glyphosate is no longer an effective Johnsongrass herbicide in Shelby and Tipton counties. This problem appears to have spread, as field observations as well as follow-up research over the past 2 years would indicate that glyphosate is no longer effective on Johnsongrass in a few fields in Crockett, Fayette, Madison, Haywood and Lauderdale counties. Only the counties near the Kentucky line seem to be getting adequate control of Johnsongrass with glyphosate in most every field. Continue reading
Because of the COVID-19 situation, the 2020 UT Cotton Scout School will be held by webinar (via Zoom) on May 29th, beginning at 8:30 AM and ending by Noon. Participants will be required to preregister to receive the Zoom password to enter the meeting. To preregister, please email LaDonn Kelso at dkelso2@utk.edu. She will reply to your message with the Zoom meeting password.
Pesticide re-certification points and Continue reading