1) 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.
2) 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.
2) 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:
http://www.peanut.ncsu.edu/pdffiles/004993/tank_mixing_chemicals_applied_to_peanut_crops.pdf
3) 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. (Peanut Science 2012 39:1-8)
4) Here a few slides of some tank-mixtures that I have tried or seen in the field.
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