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| DOI: | 10.4141/cjps86-049 |
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| Web URL(s): | http://pubs.aic.ca/doi/pdfplus/10.4141/cjps86-049
Last checked: 09/29/2015
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| Publication Type:
| Refereed |
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| Author(s): | Burpee, L. L.;
Goulty, L. G. |
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| Author Affiliation: | Department of Environmental Biology, University of Guelph, Guelph, Ontario |
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| Title: | Evaluation of two dollarspot forecasting systems for creeping bentgrass |
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| Source: | Canadian Journal of Plant Science. Vol. 66, No. 2, April 1986, p. 345-351. |
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| Publishing Information: | Ottawa: Agricultural Institute of Canada |
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| # of Pages: | 7 |
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| Keywords: | TIC Keywords: Disease forecasting; Fungicides; Dollar spot; Sclerotinia homoeocarpa; Disease control; Agrostis stolonifera
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| Abstract/Contents: | "Dollarspot, caused by Lanzia sp. and/or Moellerodiscus sp., is a serious disease of turfgrass in cool humid climates. Fungicide application programs, based on the Hall and Mills and Rothwell (M & R) dollarspot forecasting systems for creeping bentgrass (Agrostis palustris Huds.), were compared with fungicide application schedules of 7, 14, and 21 d in 1983 and a schedule of 10 d in 1984. In both years, programs based on the Hall system failed to provide acceptable disease control (<1 dollarspot m-2 of turf) with chlorothalonil applied at 5.7 kg a.i. ha-1. In 1983, the same dosage of chlorothalonil applied according to the M & R system or a 70d spray schedule resulted in acceptable disease control over a 70-d test period. Spray schedules of 14 and 21 did not provide acceptable control. In 1984, the M & R systems and a 10-d spray schedule resulted in significant disease control over a 44-d test period. Increases in the incidence of dollarspot were observed on 20 and 18 d in 1983 and 1984, respectively. The M & R system's critical weather criteria, used to select the time for fungicide applications, were met on 48 and 35 d in 1983 and 1984, respectively. This overestimation of disease indicated that the success of the M & R system was a result of prediction frequency and not prediction accuracy. Failure of the system was a result of prediction frequency and not prediction accuracy. Failure of the Hall system was attributed to its ability to predict disease on only 17% of the occasions when increases in disease incidence were observed." |
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| Language: | English |
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| References: | 7 |
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| See Also: | Other items relating to: DOLLAR |
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| Note: | Tables
Figures |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Burpee, L. L., and L. G. Goulty. 1986. Evaluation of two dollarspot forecasting systems for creeping bentgrass. Can. J. Plant Sci. 66(2):p. 345-351. |
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| DOI: 10.4141/cjps86-049 |
| Web URL(s):
http://pubs.aic.ca/doi/pdfplus/10.4141/cjps86-049
Last checked: 09/29/2015
Requires: PDF Reader
Access conditions: Item is within a limited-access website |
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MSU catalog number: SB 1 .C3 |
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