Now is the time of year that most of us will get numerous questions about the various tank-mixes that peanut growers would like to try. Here are a few reminders.
With over 90,000 potential peanut tank-mixtures, it is impossible for UGA or anyone else to have all the answers. If a grower puts more than 2 chemicals in a spray tank, it is very likely that that specific mixture will not have been adequately tested.
Just because a specific tank-mixture may not have caused peanut injury on one day, it does not mean it will not cause injury at another time. Peanut response to tank-mixtures is a function of many factors including temperature, humidity, leaf wetness, and overall plant health.
The following is a good publication to keep handy at this time: Tank-Mixing Chemicals Applied to Peanut Crops: Are the Chemicals Compatible?. This publication can be accessed from the web at the following location here.
Recent research from NC State University indicated that manganese did not affect the efficacy of Select, Poast, Cadre, Pursuit, 2,4-DB, Abound, Bravo, Headline, or Folicur. Common ragweed control with Cobra was reduced 6% by dry Mn sulfate but not liquid Mn.
Here a few slides of some tank-mixtures that I have tried or seen in the field.