Full TGIF Record # 224374
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Publication Type:
Author(s):McDonald, S. J.; Dernoeden, P. H.
Author Affiliation:Department of Natural Resource Sciences & Landscape Architecture, University of Maryland
Title:Dollar spot control in bentgrass as influenced by fungicide spray dilution and timing
Source:Turfgrass Pathology & Weed Science Yearbook of Research Winter 2004. Winter 2004, p. 47.
# of Pages:1
Publishing Information:College Park, Maryland: University of Maryland Department of Natural Resource Sciences and Landscape Architecture
Abstract/Contents:"Dollar spot (Sclerotina homoeocarpa) is a chronic disease of Agrostis stolonifera. Chlorothalonil is a contact fungicide used for dollar spot control, but its use has been restricted and methods of improving its preformance are needed. Propiconazole is a penetrant fungicide, which generally provides longer dollar spot control. Fungicides often are applied to turfgrass early in the morning in the presence of dew. The purpose of this study was to investigate the efficacy of chlorothalonil (5.5 kg ha-1) and propiconazole (3.3 kg ha-1 in 2003 and 1.6 kg ha-1 in 2004) applied alone or tank-mixed on dollar spot as influenced by water dilution and dew. Two spray dilutions (468 and 1020 L ha-1), three timings (AM dew or displaced; PM dry), and three fungicide treatments (contact and penetrant alone or tank-mixed) were evaluated. Quantified dew on the turfgrass canopy ranged from 993 to 2579 L water ha-1. Dollar spot control was improved by applying chlorothalonil in the low volume and to the dry turf. No differences were observed with propiconazole; however, the tank-mix usually provided better dollar spot control than the propiconazole alone."
Note:Reprint appears in Phytopathology, 95(6) June Supplement 2005, p. S171
This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
McDonald, S. J., and P. H. Dernoeden. 2004. Dollar spot control in bentgrass as influenced by fungicide spray dilution and timing. Turfgrass Pathol. Weed Sci. Res. Sum. p. 47.
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