There has been little corn planted to this point. Judging by the phone calls today some of that early planted corn will need to be replanted due to all the wet and cold weather. The question arises how to control the old corn stand and plant back to corn quickly. Continue reading
With planting hopefully right around the corner, many people are thinking about using Gramoxone (paraquat) as a last minute burndown for its effectiveness and lack of replant interval. Gramoxone is a very good broad spectrum herbicide that is “money” on many winter annual broadleaf weeds and also quite good on poa. On the main winter annual weed horseweed (marestail) though, control can range from 30 to 90%. The question is why? So we conducted research this spring to see if time of day Gramoxone is applied has an effect on horseweed control. Continue reading
With cotton planting just around the corner, some folks are interested in tankmixing a residual herbicide in with their burndown. The typical herbicides used for this purpose would be Sharpen (42 day plant back to cotton), Valor (30 days plant back to cotton) and Leadoff (30 days plant back to cotton) but these are no longer options as the plant back interval is too long. Continue reading
It is raining as I write and the forecast is not optimistic about getting much done in the field this week. As soon as it dries corn planting will take priority along with some early soybean planting. There is no major problem with planting corn right around a burndown application which makes it much easier than in soybean where many of the burndown herbicides have plant back restrictions. Continue reading
Corn planting started in West Tennessee this past week. With corn planting in mind, I keep seeing an advertisement on TV about one-pass programs providing season-long weed control. This advertisement might be true in some places but not in our neck of the woods. Continue reading
Ryegrass questions have become much more prevalent this week. I have had no good answers for the calls on how to control ryegrass that escaped the glyphosate burndown in emerged corn. Herbicides like Accent or Steadfast will not control ryegrass. Liberty tankmixed with atrazine on LL corn would burn the ryegrass back some and is the only even fair option that is available. Continue reading
I have written a couple of pieces on fomesafen carryover into grain sorghum. I emphasized fomesafen because it is used on almost all soybean acres in Tennessee. However, I would be remiss if I did not add that some other herbicides commonly used in soybean have lengthy plant backs to grain sorghum as well. Continue reading
There have been a number of calls this spring on weed control in conventional soybean. This is not new as calls on weed control in conventional soybeans have been more frequent the last two years. Typically the weed spectrum that is the main issue with these calls is not Palmer amaranth but cocklebur and sicklepod. Continue reading