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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Walker, G. E.;
Wachtel, M. F. |
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| Author Affiliation: | Department of Primary Industries, Loxton Research Centre, PO Box 411, Loxton, South Australia 5333 |
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| Title: | Evaluation of fungicides for control of spring dead spot, 1988 |
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| Source: | Fungicide and Nematicide Tests. Vol. 49, 1994, p. 352. |
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| Publishing Information: | St. Paul, MN: American Phytopathological Society |
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| # of Pages: | 1 |
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| Keywords: | TIC Keywords: Cynodon transvaalensis; Spring dead spot; Ophiosphaerella korrae; Disease control; Fungicide evaluation; Fungicides; Ophiosphaerella narmari
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| Abstract/Contents: | "A field experiment was conducted in spring 1987 at the Loxton RSL Bowling Club to evaluate the efficacy of various fungicides against spring dead spot in a couchgrass green. In September two transects were established across the green and the area of diseased turf in rectangular plots (0.87m2) was determined by tracing outlines of spots and using a compensating planimeter. The plots were then ranked by diseased area and allocated to a completely randomised block design with five replicates per treatment. Fungicides were applied either in spring-summer beginning in Oct 87 and repeated four times at intervals of 6 to 8 weeks until Mar 88, or in winter beginning in May 88 and repeated three times at intervals of six weeks until Aug 88. All fungicides were applied in 100 mL water/plot using a pressurised hand-held sprayer and washed in with 5L of water (equivalent to 6mm of irrigation). Untreated control plots received 5L of water only. Areas of diseased turf were again measured in May 88 after completion of the summer sprays when distinct halos were abserved around untreated spots, and in Oct 88 at the conclusion of the experiment. Areas were converted to percent area of plot diseased and were compared using the Analysis of Variance test (P<0.05). Tilt and Systhane fungicides significantly reduced the rate of expansion of dead spots over the course of spring/summer treatments (increase in area between Sept 87 and May 88) but only Systhane demonstrated significant residual inhibition on spot expansion after treatment had concluded (May - Oct 88). Also Systhane was the only fungicide applied during winter to significantly reduce the rate or dead spot expansion, although with both Rovral and Bayleton rates of expansion were not significantly different from those of either Systhane or the untreated control. Slight yellowing of turf occurred with both Systhane and Tilt, indicating a slight degree of phytotoxicity." |
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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):
Walker, G. E., and M. F. Wachtel. 1994. Evaluation of fungicides for control of spring dead spot, 1988. Fungicide Nematicide Tests. 49:p. 352. |
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