This time of year as we move to burndown behind the planter we typically get some reports of mixing issues when either glyphosate or Gramoxone is added to the tank with residual herbicides like atrazine, metribuzin, 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
Practically every September some growers are dismayed at the vine infestations present at corn harvest. Often, these weed infestations emerged after PRE applied or early POST applied herbicides had played out. They grew very little until August and as the corn dried down and light became more available those established weeds started rapidly growing. Continue reading
There were a number of reports of ryegrass escaping burndown in fields that either will soon be planted to corn or just had been planted to corn. Thankfully this issue seems less of a problem than a year ago. In most cases the ryegrass escaped glyphosate + dicamba early burndown. Paraquat application has the best probability of controlling ryegrass that has escaped early burndown. Continue reading
With the planting season started, many people are thinking about using Gramoxone (paraquat) as a burndown for many weeds present at planting. Gramoxone is a very good broad-spectrum herbicide that has been the go to for burndown of many winter and summer annual broadleaf weeds. With Palmer amaranth starting to emerge, Gramoxone is the only sure thing that will control it. However, it is less consistent controlling some weeds like horseweed (marestail). Continue reading
We have had the opportunity to observe field and demo burndowns around West Tennessee. In general, going back “old school” and applying glyphosate alone provided very effective burndown. This includes applications made back in mid-March when night time temperatures were below freezing (Picture 1). Continue reading
Increase in input costs and lower relative commodity prices compared to last year may tempt some to forgo using a PRE this spring. Since glyphosate and dicamba have actually gone down in price, it may be tempting to try this combination near planting, then hope that dicamba will provide enough residual weed control to hold until those herbicides can be applied again early POST. Continue reading
There are three newer corn herbicide premixes available: Acuron GT, Armezon PRO and Resicore. Below are some thoughts on these newer premixes as well as some that have been around for a spell: 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