There have been numerous reports of mixing issues when either Roundup PowerMax 3 or Gramoxone is added to the tank with residual herbicides like atrazine, Cotoran, Caparol, fomesafen or a pyroxasulfone containing product. What happens is the white herbicides will often clabber up and stop up screens and strainers in the sprayer. Continue reading
Results from our greenhouse screens of Palmer amaranth to Liberty has been very encouraging. We feared that the Liberty resistance documented in Arkansas had crossed the river. The good news is that we have seen good control with a 32 oz/A rate of Liberty on all the Palmer populations tested (Picture 1). Continue reading
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.
The call of the last week has been ryegrass and/or Poa escaping burndown in a number of fields that have been or will be planted to corn. In most cases the ryegrass escaped a glyphosate plus dicamba burndown. Continue reading
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
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
There will likely be more soybean acres in Tennessee in 2022 compared with last year. As such it will be more difficult to get POST applications applied timely. This is yet another reason overlapping residual herbicides for Palmer amaranth control will be essential in 2022. Continue reading
Last August and September many were disappointed in the grass and vine infestations present at corn harvest in some fields. Often, these weed infestations emerged after PRE applied or early POST applied herbicides had played out. Continue reading