Postemergence Weed Control Programs
I did not have as many trials with programs this year as I normally do. I simply got squeezed on space and had to focus on some of the research we do with company protocols. I have a few cotton trials taking up space and should have those out of the way after this season.
Here are a few images from the trials with complete programs. Some of the treatments are more intense than they need to be. I will make a few comments below each one.
As always, sometimes the programs that are the most effective can injure peanut. This program had a solid PRE herbicide that caused some injury but then was followed up with paraquat at 12 oz/acre plus 1.0 pt/acre Storm. Paraquat plus Storm has become a very common treatment in the southeastern US. It is very effective but it can injure peanuts. My recommendation has often been paraquat (Gramoxone SL at 8 oz/acre) plus Basagran (16 oz/acre) often applied with more chloroacetamide herbicide. I think we are better waiting to spray the Storm (or Ultra Blazer or Cobra) as a follow up treatment at 1.5 pt (Storm) with 8 or 16 oz 2,4-DB and not mixing with paraquat. Spiking Storm with more Ultra Blazer can help.
But it is hard to argue with the increased control of 12 oz versus 8 oz (paraquat) and the value of acifluorfen in the Storm.
Article first appeared as North Carolina Peanut Note (PNNC-2014-080)