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| Web URL(s): | http://www.plantmanagementnetwork.org/pub/trial/fntests/reports/2000/55-513.pdf
Last checked: 05/03/2017
Requires: PDF Reader |
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| Publication Type:
| Report |
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| Author(s): | Majumdar, P. R.;
Towers, G. W.;
Weibel, E. N.;
DiMarco, J. N.;
Peacos, M.;
Clarke, B. B. |
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| Author Affiliation: | Department of Plant Pathology, Rutgers University, New Brunswick, New Jersey |
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| Title: | Evaluation of chemical and biological fungicides for the control of summer patch, 1999 |
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| Section: | Turf grass reports
Other records with the "Turf grass reports" Section
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| Source: | Fungicide and Nematicide Tests. Vol. 55, 2000, p. 513-514. |
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| Publishing Information: | St. Paul, MN: American Phytopathological Society |
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| # of Pages: | 2 |
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| Keywords: | TIC Keywords: Disease control; Application rates; Disease severity; Tank mix; Poa pratensis; Summer patch; Magnaporthe poae; Fungicides; Biopesticides; Chemical control; Biological control
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| Cultivar Names: | Baron |
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| Abstract/Contents: | "Fungicides were evaluated for their ability to control summer patch on Kentucky Bluegrass at the Rutgers Turf Research Farm in North Brunswick, NJ. Turf was established Sep 1992 on a Norton loam soil with a pH of 6.1. Mowing was performed two times weekly at a height of 1.5 in. with clippings returned. The site was irrigated to prevent drought stress. Pelletized lime (24 lb/1000 sq ft) was applied on 14 Apr. Fertilizer was applied as 15-0-0 on 15 Apr (0.75 lb N/1000 sq ft), 3 Jun (0.8 lb N/1000 sq ft), 16 Jul (0.5 lb N/1000 sq ft), and 11 Aug (0.75 lb N/1000 sq ft). On 19 Apr, Dimension 1E (1 fl oz/1000 sq ft) was applied for pre-emergence weed control and Acclaim Extra 0.57E (0.64 fl oz/1000 sq ft) was used for the suppression of broadleaf weeds. Insect pests were controlled with DursbanPro 2E (2 fl oz/1000 sq ft) on 14 Jul. Plots were 3 ft x 9 ft and were arranged in a randomized complete block with four replications. Fungicides were applied in water equivalent to 4 gal per 1000 sq ft with a CO₂ powered sprayer at 30 psi using TeeJet 8003E nozzles. Treatments (trt) were initiated on 14 Jun when the maximum soil temperature at a 2 in. depth exceeded 65 °F for five consecutive days. Fungicides were reapplied at the appropriate intervals as indicated in the table. Turf had been previously inoculated in three locations per plot on 28 May 1998 with 25 cc of oat grain infested with Magnaporthe poae, isolate 73-15. Percent turf area exhibiting foliar symptoms of summer patch was assessed on 2 Aug, 13 Aug, 26 Aug, 7 Sep, and 22 Sep. Data were subjected to analysis of variance and means separation by Waller-Duncan k-ratio t-test (k=100) following arcsine transformation. Summer patch symptoms were first noticed on 26 Jul. Disease pressure was moderate througout the study. Excellent season-long control of summer patch was provided with 0.2 oz (14 day interval) and 0.4 oz (28 day interval) rates of Heritage 50WG (trt 1 and trt 4-6, respectively), DAS 0076 250SC (trt 9, 10), S-8322 (trt 22), S-8323 (trt 23), BAS 505 50WG (trt 27), and Companion I + Heritage 50WG (trt 37). When compared to the 0.2 oz rate of Heritage 50WG (trt 3) alone, the combination [of] the biological Companion I and Heritage 50WG (trt 37) resulted in significantly better control of summer patch on 7 Sep. In general, post-treatment irrigation had little effect on the efficacy of Heritage 50WG (trt 4-6). Heritage 50WG (the 0.1 and 0.2 oz rates appplied every 28 days, trt 2, 3), Heritage 50WG + Daconil Ultrex 82.5SDG (trt 7), the high rates of Chipco Triton 1.67SC (trt 14), TADS 12529 70WG (trt 16), and F-155 20W (trt 20), Cleary 3336 50W (trt 17), WAC 79 alternated with Cleary 3336 50W (trt 18), S-7395 G (trt 21), BAS 500 2.1E (trt 24-26), Banner Maxx 1.3MC (trt 31, 32), Companion I (trt 33, 34), and Companion I + Banner Maxx 1.3MC (trt 35), the 0.1 oz rate of Heritage 50WG (trt 36), or Cleary 3336 50W (trt 38) also provided good to excellent suppression of summer patch throughout most of the summer. The microbial inoculant P.G.A. Plus W (trt 39) provided acceptable disease control until 7 Sep, 14 DAT. When applied on a preventive basis (4 Aug), one 1.6 oz application of ammonium sulfate (trt 40), significantly reduced symptom expression 9 to 34 DAT, compared to the untreated check (trt 41). No phytotoxicity was observed." |
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| Language: | English |
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| References: | 0 |
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| Note: | Tables |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Majumdar, P. R., G. W. Towers, E. N. Weibel, J. N. DiMarco, M. Peacos, and B. B. Clarke. 2000. Evaluation of chemical and biological fungicides for the control of summer patch, 1999. Fungicide Nematicide Tests. 55:p. 513-514. |
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| Web URL(s):
http://www.plantmanagementnetwork.org/pub/trial/fntests/reports/2000/55-513.pdf
Last checked: 05/03/2017
Requires: PDF Reader |
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MSU catalog number: SB 951.3 .F82 |
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