Mixtures of Fungicides With Boron and Manganese Peanut Notes No. 199 2023
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Have you had any calls with compatibility issues with Provost Silver and dry manganese products? Also mixing a boron product with it. Company rep said he didn’t think it would be any issues but just wanted to see if you had any thoughts on that tank mix.
I have not had calls on this. I encourage people not to apply boron and manganese together. Sometimes we see issues with those two that are hard to explain. Provost Silver plus manganese or Provost Silver plus boron are okay. A few years ago Provost Silver caused some spots but not recently. Just have to be careful with dry manganese because it will settle.
We need to apply a lot less manganese than we do but I don’t discourage it. We typically need it only with high pH soil when symptoms begin to show. All that to say, apply B first and then apply Mn with next spray if no Mn deficiency symptoms are present. We typically need B on our soils during pod fill.
Ok thanks. We typically keep Mn and B separate like you said, but have some growers want to put it all together to play catch up. The dry Mn has been mixing fine with just the fungicide but I have a hard time recommending adding anything else with it, especially given how expensive some of the fungicides are. Thanks for the feedback.