In fields where dicamba and 2,4-D are no longer effectively controlling Palmer amaranth what are some options to help manage this weed? We conducted research at several locations this year trying to answer this question.
For the past week we have been getting reports along with a good many pictures of Palmer amaranth escaping dicamba application/s from retailers and consultants scouting fields (Picture 1 and 2). As one retailer so aptly described it today “there are spots in fields where the lack of Palmer control is frightening”. Continue reading
There have been several reports last week of multiple glyphosate and/or clethodim applications not controlling barnyardgrass or junglerice. We really do not know the precise reasons for the lack of control in any given field but based on previous research and past experience there are three likely causes. Continue reading
It is July 1, 2021 so the June 30 cut-off to spray dicamba over Xtend soybean has passed. The questions of the week have been once July has arrived what alternatives are there to control Palmer amaranth in soybean? Continue reading
Two old and now “new” again corn viral diseases Maize Dwarf Mosaic (MDM) and Maize Chlorotic Dwarf (MCDV) have been causing severe stunting of corn in a few fields in southwest Tennessee. With the slowly increasing spread of glyphosate-resistant (GR) Johnsongrass it was only a matter of time before these two diseases would once again become an issue in corn. Continue reading
There are some who have or soon will apply Zidua (pyroxasulfone) via impregnated fertilizer in cotton. My understanding is that this has been done successfully in Texas in years past. Along with those applications we have applied some in research as well a few days ago. One would expect no cotton injury applied via fertilizer to dry foliage. Indeed, that was the case in our trials. Continue reading
Some of the earlier planted cotton fields will soon be entering the true “laying it by” application timing. Given that some in 2020 were not successful spraying the same Palmer amaranth or junglerice multiple times with glyphosate + dicamba going back to an “old school” layby is a good plan. Continue reading
JACKSON, Tenn. – The University of Tennessee Institute of Agriculture will host the annual Weed Tour on Wednesday, June 16 at the West Tennessee AgResearch and Education Center. The guided tour will feature 60 weed management research tests in corn, soybean and cotton as well as a demonstration of herbicide symptomology. Continue reading