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
Overlapping residual herbicides for Palmer amaranth control will be essential in 2022. There are two main reasons for this. First is the continued evolution of dicamba-resistant Palmer amaranth in Tennessee. Our most recent greenhouse screens clearly show that some populations have upped their game with respect to their dicamba resistance from what was seen in 2020 or 2021. Second, the lack of Liberty supply greatly limits the last best option to remove Palmer amaranth in-crop that is dicamba resistant. Continue reading
It is now “burndown time in Tennessee.” The combination of supply chain issues with the ever-increasing presence of herbicide resistant weeds has made burndown time more of a challenge in 2022. Poa and ryegrass are two very common grass weeds and are of most concern, particularly before corn planting. Continue reading
Results from greenhouse experiments and in-field research this summer confirm that our state now has dicamba-resistant (DR) waterhemp. Moreover, our survey of weed escapes this fall sponsored by the Tennessee Soybean Promotion Board has found that waterhemp has spread quickly. Continue reading
Several retailers and growers in recent weeks have asked about switching away from Xtend soybeans due to the poor pigweed control they have seen in consecutive years in some fields. There are a lot of moving parts when one attempts to answer this question and some different points need to be considered. Continue reading