| |
| Publication Type:
| Report |
|---|
| Content Type: | Abstract or Summary only |
|---|
| Author(s): | Vincelli, Paul;
Doney, Jack Jr.;
Powell, A. J. |
|---|
| Author Affiliation: | Department of Plant Pathology; Department of Agronomy, University of Kentucky, Lexington, KY 40546-0091 |
|---|
| Title: | Evaluation of fungicides for control of brown patch and anthracnose/brown patch complex, 1993 |
|---|
| Source: | Fungicide and Nematicide Tests. Vol. 49, 1994, p. 340. |
|---|
| Publishing Information: | St. Paul, MN: American Phytopathological Society |
|---|
| # of Pages: | 1 |
|---|
| Keywords: | TIC Keywords: Agrostis stolonifera; Brown patch; Rhizoctonia solani; Colletotrichum graminicola; Disease control; Fungicide evaluation; Fungicides
|
|---|
| 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 1/4 in., irrigated as needed, and fertilized with 1 lb N/1000 ft2 in Oct and Dec 92 using 40-0-0 and on 3 Jul 93 using 46-0-0. Plots measured 4 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 3 gal/1000 ft2. Sprays were applied during early AM hours beginning 28 Apr and continued biweekly or monthly. Actual spray dates were 28 Apr, 11 & 25 May, 8 & 23 Jun, and 9 & 23 Jul. Inoculum of Rhizoctonia solani was produced by growing the fungus for 3 wk on sterile moist wheat (813 g wheat/1 water), air drying, and grinding. One-third oz of inoculum was dispensed into a circular area 8 inches in diameter in the center of each plor using a No. 20 sieve, resulting in very high inoculum potential in the inoculated area. The percent of foliar tissue blighted from brown patch was assessed visually on two occasions: once in the inoculated area of each plot, and once throughout each plot when "smoke rings" clearly outlined affected patches. Both anthracnose and brown patch (An/BP) were present in the experimental area but, except in inoculated areas, symptoms of foliar blighting from the two diseases could not be reliably distinguished when smoke rings were absent. Foliar blighting due to the An/BP complex was assessed visually on one date. To document pathogen activity, 25 plugs were collected at random from untreated border areas on three dates, incubated in a moist chamber for 24 hr, and two tillers/plug were examined microscopically. Appropriate transformations were used to meet ANOVA assumptions. In early July, reliable estimates of brown patch severity were possible only in inoculated areas. However, following several weeks of hot, humid weather, good development of smoke rings permitted whole-plot assessments of brown patch severity on 20 Jul, with patches developing from both natural and introduced inoculum. Whole-plot assessments of An/BP on 8 Jul provided an indication of overall control of the An/BP complex common at this site during mid-summer. Several products provided incomplete control of brown patch and/or the An/BP complex under high disease pressure. The incidence of C. graminicola on tillers on 16 Jun, 2 Jul, and 29 Jul was 78%, 74%, and 76%; and of R. solani, 42%, 62%, and 66%, respectively. Phytotoxicity was noted from Fungicide XI on several dates and from ASC-67098 on 27 Jul." |
|---|
| Language: | English |
|---|
| References: | 0 |
|---|
| Note: | This item is an abstract, with table, only! |
|---|
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Vincelli, P., J. Jr. Doney, and A. J. Powell. 1994. Evaluation of fungicides for control of brown patch and anthracnose/brown patch complex, 1993. Fungicide Nematicide Tests. 49:p. 340. |
| Fastlink to access this record outside TGIF: https://tic.msu.edu/tgif/flink?recno=34190 |
| If there are problems with this record, send us feedback about record 34190. |
| 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) |
