My gourd leaves are yellowing?

My gourd leaves have turned yellow on the edges and I am almost certain they have angular leaf spot on them as well. Those are my ornamental gourds. My hard shell gourds are only about 5 feet away and THEIR leaves are curling down and darkening. What should I treat them with? My ornamental gourds had powdery mildew last year, so I am spraying every gourd plant with that fungicide.