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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Dernoeden, P. H.;
Krouse, J. M. |
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| Author Affiliation: | Dept. of Agronomy, Univ. of Maryland, College Park, MD |
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| Title: | Preventative brown patch control with SAN 619 and Rizolex, 1990 |
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| Source: | Fungicide and Nematicide Tests. Vol. 46, 1991, p. 322. |
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| Publishing Information: | St. Paul, MN: American Phytopathological Society |
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| Keywords: | TIC Keywords: Lolium perenne; Brown patch; Rhizoctonia solani; Fungicides; Fungicide evaluation; Diseases; Disease control; Tolclofos-methyl; Chlorothalonil
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| Abstract/Contents: | "Fungicide applications were initiated prior to the appearance of R. solani activity. Treatments were applied on a 21 day interval with a CO2 pressurized (35 psi) sprayer in 2.5 gal. water per 1000 ft2 on 19 Jun, 9 Jul and 3 Aug 1990. 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 determined visually on a 0 to 100% scale. Rating that exceed 5% plot area blighted would be considered unacceptable control on a golf course fairway. Overall quality was assessed visually on a 0 to 10 scale where 0 = brown or dead turf and 10 = optimum greenness and density. Disease pressure was light to moderate from 20 Jul to 3 Aug. Mowing height was reduced from 2.5" to 1.5" on 6 Aug, which exposed lower canopy injury from R. solani resulting in higher injury ratings on 10 Aug. Between 10 and 18 Aug weather conditions were wet and overcast, and temperatures did not drop below 68F. At this time, brown patch pressure became very severe. During Jul, all treatments provided commercially acceptable brown patch control. On 3 Aug, only Chipco 26019 had not reduced blighting significantly, when compared to untreated plots. Only SAN 619 and SAN 619 + Rizolex provided commercially acceptable control on 3 and 10 Aug. Injury was most severe on 18 Aug and at this time the best level of control was observed in plots treated with SAN 619 alone or tank-mixed with either Rizolex or ProStar. Turf began to recover from brown patch thereafter and by 24 Aug it was evident that SAN 619 had provided the best combination of disease control and overall quality. Rizolex applied at 4.0 oz and Chipco 26019-treated plots exhibited an intermediate level of quality; whereas, very poor quality was observed in plots treated with Rizolex + Daconil, SAN 619 + Daconil, and ProStar." |
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| Language: | English |
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| References: | 0 |
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| Note: | This item is an abstract, with table, only! |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Dernoeden, P. H., and J. M. Krouse. 1991. Preventative brown patch control with SAN 619 and Rizolex, 1990. Fungicide Nematicide Tests. 46:p. 322. |
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MSU catalog number: SB 951.3 .F82 |
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