What is the recommendation for spraying for weeds in pasture and hay fields...
The recommendations for pasture and hay field weed control can be found in the 2016 Weed Control Guide jointly published by The Ohio State University, Purdue University, and University of Illinois. Pub#WS16, Bulletin 789, IL15
Bulletin 789 is available for purchase from your county extension office or CFAES Publications. It is also available for purchase as a PDF on the CFAES Publications website.