The disease is often active during the transition period of winter/spring to hot early summer like weather conditions experienced this year. Even though the disease may be widespread on greens and surrounds and tees, and the symptoms can be very noticeable, in most cases serious damage does not occur. When there is prolonged infection of the Poa annua plants there can develop on the leading edge (outer portion of the ring) of the affected patches a narrow band of brown leaf tissue. If this disease is a concern or if there is a history, fungicide applications may be considered. Products in the DMI/ Sterol Inhibitor family, some Strobilurins and flutolanil, have been used successfully. Also polyoxin D and fludioxonil have been used but may require more frequent applications. If an application(s) is made, keep in mind the importance of developing a well-planned and thought-through turf health management program and how additional fungicide applications fit the goals of overall disease management and turf health.
Author: Joe Rimelspach, Program Specialist - Turfgrass Pathology.
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