Full TGIF Record # 215791
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Web URL(s):http://archive.lib.msu.edu/tic/rpr/1999/72302,%20NC%20State,%20Bailey.PDF
    Last checked: 02/25/2013
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Publication Type:
i
Report
Material Type:Manuscript
Monographic Author(s):Bailey, Jack; Latta, Jason
Author Affiliation:Department of Plant Pathology, North Carolina State University
Monograph Title:A Disease Management Program to Reduce Pesticide Use on Bentgrass Greens: [Annual] Report to the United States Golf Association, 1999.
Publishing Information:[Raleigh, North Carolina]: North Carolina State University
# of Pages:8
Collation:[8] pp.
Abstract/Contents:"Weather-based advisory models, which key fungicide application during periods of favorable conditions, have not been widely used on golf courses due to the lack of evidence that they are accurate. Turf managers often rely upon calendar-based spray schedules. An ideal fungicide application program would consider all environmental factors associated with disease activity, and treatments would be made only when conditions were most favorable for disease outbreak. Therefore, determining specific environmental conditions most critical for disease outbreak, and improving cultural practices and environmental conditions prior to these outbreaks, could aid in reducing the number of chemical applications. The use of electric fans among turf managers has grown rapidly for use around 'pocket greens' which has been observed to increase turf quality. The objectives of this study were to: a) determine how wind velocities affect the turf microclimate, turf quality, and brown patch incidence, and, b) verify the relationship between weather-based advisories and disease progress. In our studies, brown patch was dramatically reduced in the areas of greatest wind velocity. Where the fans were left on and irrigation was inadequate, dollars pot was more sever [severe]. Soil moisture, algae, leaf wetness, and canopy temperatures were all less in the area of greatest wind velocity. Turf quality was highest in the same area. A regression equation was generated to define the relationship between wind velocity and brown patch (disease incidence = 0.816608 - 0.314186 * wind velocity (m/s)). This equation describes the effect wind has on decreasing the incidence of brown patch. A weather-based model (Fidanza model) will be modified with this equation to determine if this will correct some of the problems it has in predicting disease. In the 2000 growing season several versions of the 'wind modified' Fidanza model will be tested to see if they can be used to accurately predict the need f fungicide applications. Several commercially available fans will be characterized to determine the wind movement profile so that the appropriate selection and placement of these fans can be made to complement the natural airflow over greens. A radio controlled aircraft will be used to document the geometric effects of wind flow over greens to verify the accuracy of these predictions. It is anticipated that this project will reduce the use of fungicides on golf course greens by changing the microclimate to be less conducive to disease. This should help golf courses fall into compliance with the new FQPA standards."
Language:English
References:0
See Also:See also related summary article, "Disease management program to reduce pesticide use on bentgrass greens", 1999 Turfgrass and Environmental Research Summary [USGA], 1999, p. 22, R=72302. R=72302
Note:"Report to the United States Golf Association"
"November 4, 1999"
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http://archive.lib.msu.edu/tic/rpr/1999/72302,%20NC%20State,%20Bailey.PDF
    Last checked: 02/25/2013
    Requires: PDF Reader
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