| |
| Publication Type:
| Report |
|---|
| Author(s): | Dernoeden, P. H.;
Krouse, J. M. |
|---|
| Author Affiliation: | Dept. of Agronomy, Univ. of Maryland |
|---|
| Title: | Preventative control of brown patch with MON 24077, 1989 |
|---|
| Source: | Fungicide and Nematicide Tests. Vol. 45, 1990, p. 284. |
|---|
| Publishing Information: | St. Paul, MN: American Phytopathological Society |
|---|
| Keywords: | TIC Keywords: Chlorothalonil; Thiram; Lolium perenne; Brown patch; Fungicide evaluation
|
|---|
| Abstract/Contents: | "Fungicides were applied to an Apr 1989 seeded stand of perennial ryegrass when R. solani mycelium was evident, but no foliar blighting had yet begun. Fungicides were applied on two spray intervals, as noted in the data table, with a CO2 pressurized (38 psi) sprayer in 2.5 gal. water per 1000 ft2. No rain occurred within 24 hrs of any application. Soil was a Chillum silt loam with a pH of 7.1 and 1.3% OM. Plots were 5 by 5 ft, and were arranged in a randomized complete block with four replications. Percent of plot area blighted was visually determined on a 0 to 100% scale. Overall quality was visually assessed on a 0 to 10 scale where 0 = entire plot area brown or dead, and 10 = optimum greenness and density. Weather fluctuated frequently from cool-wet to warm-dry weather, and disease pressure ranged from light to moderate in Jul and from moderate to high in Aug. Treatments with ratings exceeding 5% plot area blighted would be considered unacceptable control for golf course fairway turf. During the period of fungicide applications (13 Jun to 26 Jul) disease pressure was light and data collected 11 and 26 Jul showed a similar level of brown patch control among all treatments. Beginning 10 Aug, differences among treatments appeared. Data recorded 10 and 18 Aug indicated that plots treated on the 28 day interval with MON 24077 (2.0 oz.) and Chipco 26019 (4.0 fl. oz.) had begun to lose effectiveness and they were associated with an unacceptable level of control. Data collected 29 Aug showed that all treatments, except Chipco 26019 at 4.0 fl. oz. on a 28 day interval, had continued to reduce brown patch significantly. Best residual control was provided by MON 24077 and Chipco 26019 applied on the 14 day interval. Best overall quality, and therefore best residual brown patch control, was observed where MON 24077 was applied at 8.0 oz. on the 14-day schedule." |
|---|
| Language: | English |
|---|
| References: | 0 |
|---|
| Note: | Tables |
|---|
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Dernoeden, P. H., and J. M. Krouse. 1990. Preventative control of brown patch with MON 24077, 1989. Fungicide Nematicide Tests. 45:p. 284. |
| Fastlink to access this record outside TGIF: https://tic.msu.edu/tgif/flink?recno=18185 |
| If there are problems with this record, send us feedback about record 18185. |
| 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) |
