Full TGIF Record # 19701
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Publication Type:
Author(s):Hartman, J. R.; Clinton, William; Powell, A. J.
Title:Evaluation of fungicides for control of heminthoslporium leaf spot of Kentucky bluegrass-1983:
Source:Kentucky Turfgrass Research. 1983, p. 36-37.
Publishing Information:Lexington, KY: University of Kentucky, College of Agriculture, Cooperative Extension Service
Keywords:TIC Keywords: Poa pratensis; Drechslera leaf spot; Fungicide evaluation; Disease control; Chemical control; Application rates; Formulations
Abstract/Contents:Evaluated 12 fungicides of various formulations and application rates for control of Helminthosporium leaf spot under Kentucky climactic conditions. Fungicides were evaluated on plots of mature Kentucky bluegrass turf at Spindletop farm near Lexington, KY. The turf received minimal care and was maintained at 2.5 in mowing height. Fungicide treatments were applied at 25 psi with a backpack sprayer equipped with a 6 ft boom having 4 nozzles and delivering 2 gal/1000 sq ft. Treatments were applied to 6 ft x 10 ft plots in a randomized complete block design with 4 replications. Most plots were treated biweekly from May 12 through Jul 22, and following a summer dormant period caused by a drought, from Sep 7 through Oct 7. Treatments requiring weekly applications were made 6-8 days after each of the biweekly treatments. Treatments requiring 28 day intervals were made monthly during the spray period beginning May 27, and RP 26019 applications were not begun until Jun 10. Plots were evaluated Nov 1 for % leaf blades showing leaf spots. Disease incidence was very low and ratings were made more than 3 weeks after final fungicide applications. Nevertheless, Dyrene, Chipco 26019, Daconil 2787 and Banner showed significant activity in control of leaf spot disease. Fungicide treatments formulation, application rates and leaf spot ratings are presented in a table.
Geographic Terms:Kentucky
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Hartman, J. R., W. Clinton, and A. J. Powell. 1983. Evaluation of fungicides for control of heminthoslporium leaf spot of Kentucky bluegrass-1983:. KY. Turfgrass Res. p. 36-37.
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MSU catalog number: SB 433 .A1 K4
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