Full TGIF Record # 42102
Item 1 of 1
Publication Type:
i
Report
Author(s):Grogan, J. E.; Scott, D. H.
Author Affiliation:Purdue University, West Lafayette, Indiana
Title:Evaluation of fungicides for control of dollar spot in creeping bentgrass, 1996:
Source:Fungicide and Nematicide Tests. Vol. 52, 1997, p. 351-352.
Publishing Information:St. Paul, MN: American Phytopathological Society
# of Pages:2
Abstract/Contents:"Fungicide treatments were evaluated on an experimental green at the Purdue University South Golf Course, West Lafayette, IN. The turf area received conventional golf course care and was maintained at a height of 0.25 in. The turf area was fertilized with 4.0 lb N/1000 sq fr/yr. Soil was `sand amended' Miami Clay loam with a pH of 7.3. Treatments were applied to 3.3 ft x 6.6 ft plots arranged in a randomized complete block design with 4 replications. A hand held Co²-pressurized sprayer with two 11003 LP flat fan nozzles, spaced 19 in. apart, at 22 psi and at a rate of 1 gal/1000sq ft was used for all treatment applications. All treatments were first applied on 18 Jun with additional treatments based on 14-, 21- and 28-day spray intervals. Treatment applications were discontinued after 30 Jul. Disease ratings were made by recording the number of infection centers in each plot. Cool and wet conditions in the spring were followed with extended periods of cool and dry weather for most of the summer. Day-time air temperatures rarely exceeded 90₀ F; night-time temperatures usually were between 55-65₀ F. Precipitation was below normal in early Jul and in Aug, but all plots were irrigated as needed to prevent drought stress. Dollar spot was first observed on the first application date of 18 Jun. Disease severity decreased until the middle of Jul and then steadily increased in Aug. Disease pressure was extremely heavy on 8-Aug. Thirty-three of the 64 treatments were effective in the control of dollar spot, allowing 5 or less infection centers throughout the testing period. Treatments of Fore 80WP, Fore 4SC, Heritage 50WG and EXP 10715A increased the number of infection centers compared to the untreated control. These fungicides should not be used solely when dollar spot is expected to be severe. No phytotoxicity was observed."
Language:English
References:0
Note:Tables
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Grogan, J. E., and D. H. Scott. 1997. Evaluation of fungicides for control of dollar spot in creeping bentgrass, 1996:. Fungicide Nematicide Tests. 52:p. 351-352.
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