Full TGIF Record # 38177
Item 1 of 1
Publication Type:
i
Report
Author(s):Vincelli, Paul; Doney, Jack C. Jr.; Powell, A. J.
Author Affiliation:Departments of Plant Pathology and Agronomy, University of Kentucky, Lexington, KY 40546-0091
Title:Evaluation of fungicides for control of dollar spot, 1994
Section:Turf Grass Reports
Other records with the "Turf Grass Reports" Section
Source:Fungicide and Nematicide Tests. Vol. 50, 1995, p. 353.
Publishing Information:St. Paul, MN: American Phytopathological Society
# of Pages:1
Keywords:TIC Keywords: Fungicide evaluation; Fungicides; Disease control; Dollar spot; Agrostis stolonifera; Agrotis ipsilon; Phytotoxicity
Cultivar Names:Penncross
Abstract/Contents:"The test was conducted on a sward of creeping bentgrass (cv. Penncross) on a Maury silt loam at the University of Kentucky Spindletop Farm. The turf was mowed at 0.25 in., irrigated as needed, and fertilized with 46-0-0 as follows: 1 lb N/1000 ft₂ on 8 Oct and 17 Dec 93; 0.5 lb N/1000 ft₂ on 16 May 94; and 1 lb N/1000 ft₂ on 21 Aug 94. Plots measured 4 ft x 4 ft with 2-ft borders and were arranged in a randomized complete block design with three replications. Sprays were applied using a CO²-powered, hand-held sprayer fitted with Spray Systems 8003E flat fan nozzles and delivering 2.5 gal/1000 ft₂. Control plots were treated with water. All treatments were applied during early AM hours on 27 May; subsequent applications were made following the schedules indicated in the table below. Actual spray dates were 27 May, 8 & 22 Jun, 6 & 20 Jul, and 4 & 18 Aug. Dollar spot developed from natural inoculum and was assed by counting individual foci. Appropriate transformations were used to meet ANOVA assumptions. Plots were treated for black cutworms with Sevinmal F at 6 fl oz/1000 ft₂ on 21 Jul. Dollar spot developed later than normal because of unusually cool and dry conditions in late May and early Jun. However, the disease began to develop by mid-Jun, allowing good discrimination among treatments for the remainder of the summer. Chitosan plots turned dark green for several weeks after treatment on several occasions, but exhibited an undesirable chlorosis on 27 Jun. Excessive nitrogen application was suspected to be the cause of the symptoms observed, as a lab analysis indicated a total N content of Chitosan to be 9.6%. Plots treated with Sentinel occasionally exhibited a slightly coarser texture. No other phytotoxicity or physiological response was noted in the test."
Language:English
References:0
Note:Report #343
Table
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Vincelli, P., J. C. Jr. Doney, and A. J. Powell. 1995. Evaluation of fungicides for control of dollar spot, 1994. Fungicide Nematicide Tests. 50:p. 353.
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