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| Web URL(s): | https://www.plantmanagementnetwork.org/pub/trial/bctests/reports/2005/T003.pdf
Last checked: 11/09/2016
Requires: PDF Reader |
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| Publication Type:
| Report |
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| Author(s): | Tredway, L. P.;
Butler, E. L. |
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| Author Affiliation: | Department of Plant Pathology, North Carolina State University, Raleigh, North Carolina |
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| Title: | Evaluation of EcoGuard for control of anthracnose basal rot, 2004 |
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| Source: | Biological and Cultural Tests for Control of Plant Diseases. Vol. 20, 2005, p. [1-2]. |
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| Publishing Information: | St. Paul, MN: The American Phytopathological Society |
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| # of Pages: | 2 |
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| Keywords: | TIC Keywords: Product profile; Disease control; Anthracnose basal rot; Biological fungicides; Fertilization; Fungicide combinations; Fungicide evaluation; Colletotrichum graminicola
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| Trade Names: | Ecoguard |
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| Abstract/Contents: | "EcoGuard, a biofungicide containing Bacillus licheniformis, was evaluated for its ability to suppress anthracnose basal rot development when applied alone or in combination with select fungicides. This trial was conducted at the Lake Wheeler Turfgrass Field Lab in Raleigh, NC on 'Penncross' creeping bentgrass maintained under golf course putting green conditions. Mowing was performed 3 times weekly at a height of 0.156 in. with clippings collected. The site was irrigated only as needed to prevent sever drought stress and encourage anthracnose basal rot development. Fertilizer was applied as 190-5-9 on 5 Jan, 2 Feb, and 1 Apr (0.5 lb N/1000 sq ft) and as 25-5-15 on 5 Mar (1 lb N/1000 sq ft), 23 Apr (0.5 lb N/1000 sq ft), and 13 May (0.5 lb N/1000 sq ft). Insect pests were suppressed with Dursban Pro (1 fl oz/1000 sq ft) on 7 May, 9 Jul, and 25 Aug with Talstart (0.25 fl oz/1000 sq ft) on 9 May and 12 Aug. Surfside Wetting Agent (6 fl oz/1000 sq ft) was applied on 7 May, 14 Jun, and 9 Jul to control localized dry spots. Plots were 3.33 ft x 6 ft and were arranged in a CO2 powered sprayer at 40 psi using TeeJet 8004 nozzles. All treatments were initiated on 1 Jun and were reapplied at the appropriate intervals as indicated in the table. Percent turf area exhibiting anthracnose basal rot symptoms was assessed on 28 Jun, 6 Jul, 13 Jul, 22 Jul, and 13 Aug. Turfgrass quality was evaluated on 22 Jul and 14 Aug, using a 1 to 9 scale (9-best, 5=acceptable) based on color, density, and uniformity. Data were subjected to analysis of variance and means separation by Waller-Duncan k-ratio t test (k=100). Anthracnose basal rot development from natural inoculum sources in late June following a 6 day period of overcast weather. The disease continued to progress throughout July and August due to stress from low nitrogen levels and drought imposed on the experimental area. No significant differences in anthracnose incidence were detected among treatments from late June through mid July. All fungicide treatments, except Heritage (0.2 oz, 28 day), provided good to excellent control of anthracnose basal rot on 22 Jul. In addition, plots treated with EcoGuard (20 fl oz, 14 day), provided good to excellent control of anthracnose basal rot on 22 Jul. In addition, plots treated with EcoGuard (20 fl oz, 14 day and WP140 exhibited significantly less anthracnose symptoms than the untreated control. Heritage (0.2 oz, 28 day) was not significantly different from the untreated control on 22 Jul, but the rotation of Heritage and EcoGuard provided excellent anthracnose control on this date. On 13 Aug, all Daconil Ultrex treatments provided significant anthracnose control. The addition of EcoGuard Daconil Ultrix in tank mixtures or rotations did not provide further reductions in disease incidence. Neither Heritage treatment suppressed anthracnose incidence on 13 Aug, but the addition of EcoGuard to Heritage in tank mixtures or rotations significantly reduced disease incidence compared Heritage alone or the untreated control. WP140 reduced anthracnose incidence on 14 Aug when applied on 7 day intervals, but not when applied on 14 day intervals. EcoGuard, WP140, and WP145 did not significantly improve turfgrass quality when compared to the untreated control on 22 Jul or 14 Aug. Combinations of EcoGuard with Daconil Ultrex or Heritage in tank mixtures or rotations significantly improved turfgrass quality compared to ht untreated control on 22 Jul, whereas the fungicides alone did not improve quality. On 14 Aug, combinations of Heritage and EcoGuard significantly improved turfgrass quality compared to the untreated control, whereas Heritage alone did not improve quality. All EcoGuard treatments inducted a noticeable improvement in turf color, likely due to the presence of plant available nitrogen in the product formulation. The improvement in turf color was primarily responsible for the increase in turf quality ratings. EcoGuard has suppressive activity against anthracnose basal rot when applied in tank mixtures or rotations with fungicides, but the role of nitrogen in the EcoGuard formulation in suppression of anthracnose basal rot requires further investigation." |
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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):
Tredway, L. P., and E. L. Butler. 2005. Evaluation of EcoGuard for control of anthracnose basal rot, 2004. Biol. Cult. Tests Control Plant Dis. 20:p. [1-2]. |
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| Web URL(s):
https://www.plantmanagementnetwork.org/pub/trial/bctests/reports/2005/T003.pdf
Last checked: 11/09/2016
Requires: PDF Reader |
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MSU catalog number: SB 975 .B5 |
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