My fescue has been turning black in patches. Why? What can I do about it?

Question

Previous answers to this question were weak or unlikely to be appropriate. I hope someone can do better this time.

Answer 1

Probably rust. Rust occurs on tall fescue and is seen most often during periods of cool, cloudy weather in spring, late summer, or fall. Early symptoms include small, yellow flecks that develop on the leaves and stems. The flecks expand over time and eventually rupture to release powdery masses of yellow spores. Heavily infected areas become thin and will exhibit clouds of yellow spores when the foliage is disturbed. The rust on infected leaves will turn black in color during the fall as temperatures cool which sounds about right for you.

Low light intensity, inadequate fertilization, drought stress, and infrequent mowing greatly encourage rust development.

The best sollution to maintain a balanced fertilizer program and to maintain a regular mowing schedule. Be sure not to remove more than 30 to 40 percent of the foliage in one mowing. Collect and dispose of clippings taken from infected areas to avoid spreading it. Wash off equipment before entering non-infected areas. Several fungicides can be used to control rust diseases, but are usually not necessary if the above steps are taken.

Answer 2

It sounds like black mold, go to mastergardner.com you should find your answer and cure good luck.