Gray Leaf Spot of St. Augustinegrass.
Photograph courtesy Lane P. TredwayUniversity of Georgia, Department of Plant PathologyMiller Plant Sciences Building, Athens, GA 30602
Host: St. Augustinegrass (Stenotaphrum secundatum)Disease name: Gray Leaf SpotPathogen name: Pyricularia grisea (teleomorph Magnaporthe grisea)
Gray leaf spot is a persistent problem in the maintenance of St. Augustinegrass for lawns, landscapes, and sod production. When managed properly, St. Augustinegrass rarely sustains serious damage from gray leaf spot activity. However, during extended periods of warm and humid weather, fungicide applications may be required to prevent significant reductions in aesthetic quality. Gray leaf spot has recently become a problem in cool-season grasses, such as tall fescue and perennial ryegrass. Widespread losses of perennial ryegrass turf have been reported in the Northeast and Mid-Atlantic U.S. since 1995. Gray leaf spot of tall fescue has been observed in the Southeastern U.S., where significant damage can occur during the late summer and early fall.
APS publication number: IW000019
Picture your photograph as the APSnet Featured ImageClick here to find out more
License to Copy. This notice hereby grants permission to APSnet users to copy the image featured for noncommercial, personal use. All components of APSnet are copyrighted and may not be reproduced or distributed except by express permission of APS. Copyright is not claimed for material provided by United States government employees as part of their work. APSnet copyright extends to images, text, graphics, photographs, illustrations, audio, video, computer software, and all other elements of the site.Instructions to Copy. For PC, position your mouse cursor on the featured image, click the right mouse button, and choose "Save Picture As..." or "Save this Image as..." whichever is the case. For Mac, click the only mouse button and follow the same steps. Users may want to set up a specific directory and file naming scheme for storing images; otherwise, they will be saved using your system defaults. Images may be used in any software application that supports JPEG file format or viewed in an Internet browser as local files.