Description: Small (1/8-1/4" long), reddish-brown, oblong pustules scattered over the surface of leaves.

Location: Can occur anywhere in the state, but frequently more common in northern Ohio.

Time of attack: Rust can be seen as early as late June in years with abnormally cool growing conditions. Disease continues to spread until plant maturity during periods of cool weather with light rain.

Management:
Resistant hybrids