| |
| Publication Type:
| Report |
|---|
| Author(s): | Vincelli, P. C.;
Doney, Jack Jr.;
Powell, A. J. |
|---|
| Author Affiliation: | Dept. of Plant Pathology; Department of Agronomy; University of Kentucky, Lexington, KY |
|---|
| Title: | Control of dollar spot, brown patch, and anthracnose on creeping bentgrass, 1992 |
|---|
| Source: | Fungicide and Nematicide Tests. Vol. 48, 1993, p. 357. |
|---|
| Publishing Information: | St. Paul, MN: American Phytopathological Society |
|---|
| # of Pages: | 1 |
|---|
| Keywords: | TIC Keywords: Agrostis stolonifera; Dollar spot; Lanzia; Moellerodiscus; Brown patch; Rhizoctonia solani; Colletotrichum graminicola; Inoculum; Urea; Fungicide application; Irrigation; Disease evaluation
|
|---|
| Abstract/Contents: | "The trial was conducted in a sward of creeping bentgrass (cv. Penncross) at the UK Spindletop Research Farm in Lexington. The experimental area was fertilized with urea (46-0-0) at 1.5 lb N/1000 ft2 in Oct & Dec 91 and at 1.0 lb N/1000 ft2 in Mar and on 11 Jun 92. The area was mowed every 1-2 days to a height of 0.25 inch and was irrigated as needed. Plots measuring 4 X 4 ft were established in a randomized complete block design (four reps) in an area that had not received applications of systemic fungicides in 2 yr. The treatments indicated in the table below were applied with a CO2-powered, hand-held sprayer fitted with LF-2-80 flat-fan nozzles and delivering 3.5 gal/1000 ft2. Application dates for 2-wk intervals were 1 & 14 May; 1, 12 and 26 Jun; 13 & 27 Jul; and 11 Aug. For 4-wk spray intervals, applications were begun 1 May and repeated monthly through August. For curative programs, applications were begun on 27 Jul, after brown patch was detected, and again 2 weeks later. In addition to fungicides, and antitranspirant product called Masbrane (ai = dodecyl alcohol) was tested. This material has been reported to control a variety of necrotrophic pathogens in experiments in China (Plant Dis. 74:263-366) as well as powdery mildew fungi in the U.S. (Plant Dis. 76:513-517). To induce development of brown patch, plots were inoculated by spreading wheat grain colonized by R. solani onto plots onto plots at a rate of 8 lb/1000 ft2 on 19 Jun. Inoculum was prepared by growing the fungus on moistened, autoclaved wheat, drying, and grinding in a Wiley mill. Other diseases occurred from natural inoculum. Dollar spot infection centers in each plot were counted on the dates indicated. Both brown patch and anthracnose (BP/An) were determined to be present based on microscopic examination of blighted leaves, but symptoms of foliar blighting from the two diseases could not be reliably distinguished at the times assessments were made. Foliar blighting due to BP/An was assessed by visually estimating the percent of plot area with symptoms; thus, assessments of foliar blighting in July in individual treatments may represent damage from one or both diseases. All data were arsine-transformed for analysis; however, numerical means are presented for ease of interpretation. Cool, wet weather for much of the season was conducive for severe outbreaks of dollar spot. Warm, humid weather in late July led to some foliar blighting caused by BP/An. Weather during August was very cool and was not conducive to disease during most of the month. Most products tested provided good control of dollar spot and BP/An. Flutolanil and Masbrane failed to control DS. On 22 Jun, DS control was somewhat poor in two additional treatments: Daconil 2787 applied biweekly at 6 fl oz, and Sentinel applied every 4 wk at 0.25 oz. Masbrane and Curalan failed to control BP/An. Eagle, Chipco 26019, Flutolanil, Vorlan Plus at 2 oz, and Sentinel had more disease than the best treatment on at least one assessment date in July. Growth regulating effects were observed in plots treated with EXP10064C at 2 fl oz (coarse, bluish-yellow turf); plots treated with Sentinel (slightly darker green color and slightly coarser texture); and plots treated with EXP10357A + Chipco 26019 (occasionally a slightly darker green color and slightly coarser texture). An additional assessment for BP/AN was made on 3 Aug in five treatments: the control, and Flutolanil 70WG at 1.43 oz every 2 wk, at 2.14 oz every 2 weeks, at 1.43 oz curatively, at 2.14 oz curatively. Treatment means and statistics for these respective treatments are: 35.6 a, 0.8 c, 3.2 c, 14.0 b, and 9.7 b, indicating curative activity from Flutolanil but best control using preventive sprays." |
|---|
| Language: | English |
|---|
| References: | 0 |
|---|
| See Also: | Other items relating to: DOLLAR |
|---|
| Note: | Table |
|---|
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Vincelli, P. C., J. Jr. Doney, and A. J. Powell. 1993. Control of dollar spot, brown patch, and anthracnose on creeping bentgrass, 1992. Fungicide Nematicide Tests. 48:p. 357. |
| Fastlink to access this record outside TGIF: https://tic.msu.edu/tgif/flink?recno=30060 |
| If there are problems with this record, send us feedback about record 30060. |
| Choices for finding the above item: |
|---|
| 
MSU catalog number: SB 951.3 .F82 |
| Request through your local library's inter-library loan service (bring or send a copy of this TGIF record) |
