How Long Can Inoculant Remain in the Tank Without Loss of Efficacy Peanut Notes No. 27 2018
Companies state that inoculant should be applied on the same day they are put in the spray tank. I agree, and if you are not able to plant that day I would add a full rate of inoculant with the tank the next day. Inoculants cost around $10/acre (this varies) but constitutes 1% of production cost of $900/acre. See pages 25 and 26 of 2018 Peanut Information for a discussion on economic return for inoculant and the challenges with correcting a nitrogen deficiency. Do not mess around on new ground. Inoculant performance becomes the single most important element of success and economic return in those fields. I also recommend that on new ground growers apply a peat-based material with seed in the seed hopper. That is inexpensive insurance. Always use fresh inoculant every day.