Fungicides on alfalfa

My alfalfa took leaf spot disease right after first cutting and never grew out of it.....the leaves were falling off as quick as they were growing new ones. I was finally able to cut what there was of second cut last week. Just went and looked at the 3 inch tall regrowth and it already has leaf spot disease again.

I did some research and it appears that Headline is the fungicide of choice for alfalfa. Has anyone ever used Headline or another fungicide on alfalfa? Correct me if I'm wrong but I thought that fungicides were a preventative spray and would not help if the disease is already on the plant? If that is the case is it going to do any good to spray since it already has the leaf spot disease again? I'm hoping that isn't the case since I cannot afford to have another poor cutting of alfalfa.

Hayden

Fungicides on alfalfa