Horseweed (marestail) has made a major comeback in 2025! The last time horseweed infestations were this intense in so many fields this late in the spring was in 2017. The question is why? I can point to one likely reason. Continue reading
There have been a few reports of disappointing burndown applications that were applied near that huge week of rain. The herbicides that performed poorly were some combination of systemic herbicides like glyphosate, dicamba, clethodim and Leadoff. Continue reading
Judging from recent conversations there will be a significant number of corn acres that will need to be replanted due to the foot of rain we recently received. Fortunately, there are several options to control a thin corn stand and replant back to corn. Continue reading
There are questions on how much PRE-applied herbicide is left in the field after a foot plus of rain. The short answer to the question is little to none. 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
A big question this spring is how does one control Palmer amaranth in Xtend soybean with no dicamba option? The fundamentals of leaning heavily on herbicides that provide good residual control of pigweed is the answer. Starting in about 2019, the most consistent strategy to control Palmer amaranth has been overlaying residuals. That was because POST options started becoming less reliable due to the evolution of dicamba/2,4-D resistance stacked onto pigweed already resistant to glyphosate, PPO and ALS- inhibiting herbicides. Continue reading
Ryegrass and poa control can become more problematic when horseweed must also be controlled. Simply dropping dicamba in the tank with glyphosate and/or clethodim to control the horseweed will compromise the grass control of those two herbicides. So, is there a herbicide that can be added to glyphosate or glyphosate + clethodim that will provide horseweed control while not sacrificing ryegrass control? There is really only one option that is in good supply that would fit the bill. Continue reading
Ryegrass has become a major issue in many Tennessee fields. For managing GR ryegrass, it is best to do it as early as practical and utilize a clethodim + glyphosate tankmix. This tankmix needs to be applied at least 30 days ahead of corn planting to use a clethodim rate that has any chance of controlling well established ryegrass. Continue reading