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| Publication Type:
| Report |
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| Author(s): | Holmes, G. J.;
Engle, C. E. |
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| Author Affiliation: | University of California Coop. Ext., Imperial Co. and Bayer Corp, Kansas City, MO |
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| Title: | Evaluation of fungicides for control of bermudagrass Rust. 1996 |
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| Source: | Fungicide and Nematicide Tests. Vol. 52, 1997, p. 389. |
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| Publishing Information: | St. Paul, MN: American Phytopathological Society |
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| # of Pages: | 1 |
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| Abstract/Contents: | "The experiment was conducted in a commercial bermudagrass seed field near El Centro, Calif. The field was planted in Jun 1991 and approximately 400 lb of N was applied annually in the flood irrigation water (5.5 ac-ft/yr). Experimental design was a randomized, complete block with 4 replicates of 6 treatments. Each plot measured 5 ft x 10 ft. Liquid fungicides were applied using a Co² backpack boom sprayer equiped with a 3-nozzle, hand-held boom (19 in. spacing), TXVS #12 conejet nozzles, operating at 35 psi and delivering 46 gal/A. Silwet surfactant (0.25 fl oz/A) was added to all fungicides except sulfur which was applied as a dust. Treatments were made immediately prior to the first sign of disease (12 May) and 7 days after the first application (26 May). All treatments were applied twice except for one Folicur treatment which was applied once on 26 May. Plots were infested with freshly cut, rust-infected (high level of disease) bermudagrass foliage (42 g/plot on 13 May, and 42 g/plot on 14 May) collected from a nearby commercial field with high levels of disease. Disease severity was rated on a scale of 0 to 10 (0=no disease; 10=high level of disease) 8 days following the second fungicide application. Data were analyzed by analysis of variance and the Duncan-Waller K-ratio multiple comparison test. Disease was first detected 8 days following the first application (20 May). Observations of similar disease levels outside the treated plots suggest that artificially introduced inoculum did not contribute significantly to disease severity within plots. Disease levels overall were moderate, occurred late in the season, and would not have justified fungicide treatment. Disease severity in all plots except those treated once (26 May) with Folicur was significantly less than disease severity in the nontreated plots. The results indicate the need for preventative applications in order to achieve significant control of the disease. Higher disease pressure may be necessary in order to further separate treatment efficacy." |
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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):
Holmes, G. J., and C. E. Engle. 1997. Evaluation of fungicides for control of bermudagrass Rust. 1996. Fungicide Nematicide Tests. 52:p. 389. |
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MSU catalog number: SB 951.3 .F82 |
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