Full TGIF Record # 92943
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Publication Type:
i
Report
Content Type:Abstract or Summary only
Author(s):Walsh, B.; Gillespie, T. J.; Boland, G. J.
Author Affiliation:Walsh and Boland: Environmental Biology, University of Guelph, Guelph, Ontario; Gillespie: Land Resource Science, University of Guelph, Guelph, Ontario
Title:Evaluation of impedance leaf wetness sensors for measurement of dew duration on creeping bentgrass greens
Meeting Info.:APS/ESA Joint Annual Meeting, November 8-12, 1998, Las Vegas, Nevada
Source:Phytopathology. Vol. 88, No. 9, September Supplement 1998, p. S93-S94.
Publishing Information:St. Paul, MN: American Phytopathological Society
# of Pages:2
Keywords:TIC Keywords: Agrostis stolonifera; Golf greens; Leaf wetness duration; Dew; Measurement; Poa pratensis; Golf fairways
Abstract/Contents:"Leaf wetness is a measured variable in turf disease forecasters. Seven leaf wetness sensors were compared for ability to monitor dew duration on bentgrass. Sensors (S) were made of 2 non-contacting adjacent metal wires connected to a datalogger. The onset and dissipation of dew was determined by tactile observations and compared to sensor output. The mean response time (M) of each sensor defined accuracy and standard deviation (SD) indicated precision. M and SD were summed (M + SD) to rank sensors in increasing order to determine the most effective sensor. For dew onset, S2 was most accurate with M = 39.1 min and S3 was most precise with SD = 44.7 min. M + SD indicated S3 estimated dew onset most closely. For dew dissipation, S2 was most accurate with M = 34.6 min and precise with SD = 39.7 min. For overall dew duration, S2 had the smallest M and SD of 36.7 min and 46.6 min, respectively. Therefore, the Model 237 (Campbell Scientific, Inc.) sensor, placed in a Kentucky bluegrass canopy maintained at fairway height, was the optimum sensor for monitoring dew duration on bentgrass greens."
Language:English
References:0
Note:This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Walsh, B., T. J. Gillespie, and G. J. Boland. 1998. Evaluation of impedance leaf wetness sensors for measurement of dew duration on creeping bentgrass greens. Phytopathology. 88(9):p. S93-S94.
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