Question:
I have been getting some questions about what exactly needs to be included with apogee. I know just from the label it says a nitrogen source and COC. It seems people are getting mixed messages about what to include with that application. Do you have any other suggestions besides what is on the label?
Jordan:
Nitrogen is absolutely critical. Liquid ammonium sulfate is what I have been using lately but historically liquid UAN has worked. I add crop oil concentrate as well. I often use 1 pint/acre of crop oil concentrate. I do not use nonionic surfactant with Apogee. Nitrogen is the key to optimizing performance of Apogee, dry Kudos, Kudos OD, and Cryova. Crop oil concentrate and 80/20 surfactant will add to the effectiveness in some cases above nitrogen, but not in all cases. At the price of these products, I would optimize performance by including both nitrogen and crop oil concentrate. But do not leave out the nitrogen.
I have mixed numerous other products (fungicides, herbicides, insecticides) with Apogee in trials and have generally stated that one can apply Apogee and dry Kudos with other products. The bulk of that work was done many years ago. I have seldom had anyone say they had a problem with mixing other products with Apogee or dry Kudos. I have assumed the same would hold for Cryova (a dry prohexadione calcium formulation) but I have not looked at mixtures in research. We have looked at some mixtures of Kudos OD with other products. For now, I do not recommend that anything be applied with Kudos OD other than a nitrogen solution and either crop oil or 80/20 surfactant.
*The following links provide details on research with prohexadione calcium from many years ago. But these results are dated in light of Kudos OD. We are working toward a better understanding of adjuvant use and compatibility with other products used in peanuts for Kudos OD but we have a ways to go.
Prohexadione calcium applied with different adjuvants
Compatibility of prohexadione calcium with other products used in peanut