brown ring patch on rye overseeded bermuda
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Suspected Waitea circinata (brown ring patch,anamorph Rhizoctonia circinata) had been kept in check with Heritage. However, two subsequent treatments with thiophanate-methyl failed to control this aggressive pathogen. Mycelium in photo developed after overnight incubation of the sample in a moist chamber. Southern California, July 2007.
Turf Diseases