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Though the current cold snap has caught our attention, we are actually ahead on heat units compared to this time last year, and we’ve accumulated enough degree days to see potential outbreaks of alfalfa weevil in some locations.  Weevils have already been spotted in northwest Ohio.  Overwintered adults begin laying eggs when temperatures exceed 48°F.  Peak larval activity and feeding damage occur between 325 and 575 heat units (based on accumulation of heat units from January 1 with a base of 48°F).  Current (Jan. 1 – Apr.

An update for nutrient recommendations for Ohio's major field crops (corn, soybean, wheat, and alfalfa) was published in November 2020 as the Tri-State Fertilizer Recommendations for Corn, Soybean, Wheat, and Alfalfa. The call came in shortly after suggesting that we grow several other crops in Ohio that were not included in this update.