Symptoms: At a glance the overall symptoms appeared similar to anthracnose. The color of the turf is rust to reddish-orange color (remember a pathologist description of colors may not be what you may picture in your mind so look at the photos) and affected turf is in spots that are 1-3 inches in diameter and can run together to cause decline of large area(s). Leaves may have small spots / lesions that are reddish or brown and entire leaves rapidly die. Under the microscope there are abundant long multiseptate conidia which make identification rather easy.
Environment: Occurs in warm 70's to 85 F, wet weather, with long periods of wet leaf tissue. Not a wide spread disease and often occurs with dollar spot (see photos). High rates of fertilizer increase the disease.
Management: Avoid excessive fertilization. Maximize the time foliage is dry. Recommended fungicide information is some what limited but - chlorothalonil, iprodione, thiophanate methyl, myclobutanil, and triadimefon have been reported as materials to use. Authors: Joseph Rimelspach & Nancy Taylor
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