Greetings, 
My horses are suffering from the slobbers. Our pasture has clover, and the horses are having a reaction to the slaframine or black patch. I’m told I need to Contact my local NRCS office, Ag Office, or extension agent in my county. I’m told they have pasture management specialists who can help at no cost. 
I know everything I read states that the slobbers are not a danger to my horses, but one died last month from colic. We never knew he was sick. It’s been suggested that some horses who are already immunocompromised might be a higher risk for colic from dehydration after prolonged slobbers. 
Is there someone you can direct me to that can give me a plan to clear my pastures of this slaframine? We have clover, buttercups, dogbane, and other weeds, so we rotate between three 1.5 acre pastures every 5 days and mow about 2x per month when the weeds get tall. We have a lawnmower but no tractor. Tilling isn’t an option. I’ve read suggestions of Pasture pro weed killer, Tryclopyr, No till winter rye seeds, Grazon 2-4d, lime, or Nitrogen. I have beehives so I’d like to do something during the winter when the bees aren’t out foraging. 
I hope you can direct me to the right person.