WILLMAR - You can't miss the leaves. They're everywhere on lawns, driveways and streets - bright green, almost-brand-new leaves.

Blame the cold, wet spring for the fungal infections causing the green in the streets, according to area nurseries and the University of Minnesota Extension Service.

And don't worry. The leaves will be back, and established trees should recover without a problem.

Several different fungi can cause anthracnose, which causes young leaves to develop spots and drop. Common shade trees like ash, oak and maple can develop anthracnose. Each type of tree is susceptible to a different fungus.

By the time the leaves drop, the infection has probably run its course. As summer brings warmer, drier weather, the trees' remaining leaves will mature, and the trees will produce new leaves to replace the ones that fell.

With a wet, cold spring and even snow in May, it's a bad year for fungal diseases on trees and shrubs, according to information posted this week on the Extension Service website.

In general, the diseases look worse than they are. They rarely kill trees or cause major damage and usually don't need treatment.

"What's wrong with my plant?" site has diagnostic keys to help you identify the disease as well as good information about how concerned you should be and what steps, if any, are recommended to control it. The site is at extension.umn.edu/garden/diagnose/plant/