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Waitea circinata var. circinata is the causal agent of brown ring patch, an emergent disease of turfgrass in the United States. Forty-two isolates from annual bluegrass were obtained from California, Connecticut, Idaho, Illinois, Massachusetts, New York, Ohio, Oregon, and Rhode Island. Almost all isolates produced white to orange sclerotia (bulbils), 2 to 5 mm in size, that turned dark brown after 21 days on ¼-strength potato dextrose agar. The ribosomal DNA internal transcribed spacer regions and 5.8S region (ITS) were analyzed by restriction fragment length polymorphism (RFLP) analysis using MspI and sequencing to attempt identification of the isolates. Some isolates were heterozygous at the MspI restriction site, results not found in previous reports using the RFLP technique for identification. Four additional nucleotide positions were found to be variable within ITS based on sequence analysis, including two indels and two additional heterozygous positions. A total of 17 ITS haplotypes were found, and there was no obvious relationship between ITS haplotype and the geographic distribution of the isolates. Results of this work indicate that W. circinata var. circinata is present in multiple states and provide an initial understanding of the diversity of the pathogen in the United States.
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Control of Annual Bluegrass Seedheads on a Golf Course Putting Green Using Plant Growth Regulator Products and Growing Degree Day Models, 2019
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Control of Annual Bluegrass Seedheads on a Golf Course Fairway Using Plant Growth Regulator Products and Growing Degree Day Models, 2019
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Control of Annual Bluegrass Seedheads on a Golf Course Putting Green Using DMI Fungicides and Plant Growth Regulator Products, 2019
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CONTROL OF ANNUAL BLUEGRASS SEEDHEADS ON A GOLF COURSE PUTTING GREEN USING DMI FUNGICIDES AND PLANT GROWTH REGULATOR PRODUCTS, 2019
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Control of Annual Bluegrass Seedheads on a Golf Course Fairway Using Plant Growth Regulator Products, 2019
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Seedhead control with Proxy and Primo applied in the fall and spring
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Annual bluegrass seedhead control with proxy/primo applied in the fall and spring
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Hydraulic Fluid Type and Remediation Practices on Hydraulic Leak Injury to Creeping Bentgrass Putting Greens
