To Spray Funcide on corn or not

When we look at the yes or no answer on whether or not to spray fungicide we are left on the fence. We hope to get that yield bump, and it does not always happen.  One thing that needs to be done is to find out if gray leaf spot susceptible seed has been planted.  Scouting also important along with a look at growing conditions.   A look at yesterday's map shows where conditions are likely to be wet and good for growing fungi. 

Iowa State University offers good advice.