| |
| Web URL(s): | https://www.plantmanagementnetwork.org/pub/trial/pdmr/reports/2007/T041.pdf
Last checked: 11/14/2016
Requires: PDF Reader |
|---|
| Publication Type:
| Report |
|---|
| Author(s): | Harmon, P. F.;
Hill, P. |
|---|
| Author Affiliation: | Department of Plant Pathology, University of Florida-Institute of Food Agricultural Sciences, Gainesville, Florida |
|---|
| Title: | Evaluation of fungicides for control of large patch on St. Augustinegrass sod, 2004 |
|---|
| Source: | PDMR: Plant Disease Management Reports. Vol. 1, 2007, p. T041. |
|---|
| Publishing Information: | St. Paul, MN: American Phytopathological Society |
|---|
| # of Pages: | 1 |
|---|
| Keywords: | TIC Keywords: Fungicides; Fungicide trials; Fungus control; Rhizoctonia blight; Stenotaphrum secundatum; Quality; Disease severity; Application rates; Fungicide evaluation
|
|---|
| Abstract/Contents: | "Fungicide trials were conducted on a 'Floratam' St. Augustinegrass area located at the G.C. Horn Turfgrass Field Laboratory, University of Florida, Gainesville, FL. Treatments were assigned to 6 by 6 ft plots in 4 replications of a randomized complete block design. On 18 October, fungicide treatments were initiated using a CO2 bicycle-wheel sprayer, calibrated to deliver 0.5, 2, or 4 gal/1000 sq ft volume per plot through four 8003 Teejet flat-fan nozzles (delivery volume adjusted with walking speed). Plots were mowed weekly at 3 in. Irrigation was applied as needed. Plots were inoculated with 0.61 in3 of wheat berries infested with an isolate of the pathogen collected from St. Augustinegrass. The infested grain was inserted into the thatch layer of each subplot center on 26 October 2004. Fungicide applications were made on 18 October, 2 November and 18 November for 14-day treatments and 18 October and 18 November for 28-day treatments. Disease severity was recorded on the Horsfall-Barratt scale. Turfgrass quality observations (scale of 1-10 with 10=dark green turf, 1=dead/brown turf, and 6=minimally acceptable turf) also were made. Means separations were determined with untransformed data and the Waller-Duncan k-ratio t-test. Horsfall-Barratt values were transformed into disease percentages for the table. No disease was observed prior to the initial application of fungicide treatments. Large patch symptoms were observed approximately 21 days after inoculation. All fungicide treatments reduced large patch severity. By late November, disease pressure was high, but on 1 December the grass was dormant and disease was difficult to rate. Fungus Control for Lawns by Bayer Advanced provided some control in the fall. During spring green-up in mid-March, disease was first observed in the untreated control plots. Disease was more severe in untreated control plots than in fungicide-treated plots. Results suggest that preventive fall applications of the fungicides evaluated can reduce large patch severity. No statistical differences were detected between Insignia and similar Heritage treatments. Three, 14-day applications of Insignia did not result in significantly better control than two, 28-day applications. Delivery of Insignia in 0.5 and 2 gal/1000 sq ft resulted in equivalent levels of control. Delivery of product in 4 gal/1000 sq ft did not perform as well in this test as delivery in 0.5 and 2 gal/1000 sq ft. The granular product reduced the amount of disease observed compared to the non-treated plots on 15 November. All fungicide applications resulted in significantly less disease severity, and significantly greater turfgrass quality, in March 2005." |
|---|
| Language: | English |
|---|
| References: | 0 |
|---|
| Note: | This item is as abstract and tables only! |
|---|
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Harmon, P. F., and P. Hill. 2007. Evaluation of fungicides for control of large patch on St. Augustinegrass sod, 2004. PDMR: Plant Dis. Manage. Rep. 1:p. T041. |
| Fastlink to access this record outside TGIF: https://tic.msu.edu/tgif/flink?recno=124185 |
| If there are problems with this record, send us feedback about record 124185. |
| Choices for finding the above item: |
|---|
| Web URL(s):
https://www.plantmanagementnetwork.org/pub/trial/pdmr/reports/2007/T041.pdf
Last checked: 11/14/2016
Requires: PDF Reader |
| Find from within TIC:
Digitally in TIC by record number. |
| Request through your local library's inter-library loan service (bring or send a copy of this TGIF record) |
