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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Tisserat, N.;
Pair, J. |
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| Author Affiliation: | Dept. of Plant Pathology; Dept. of Horticulture, Kansas State University |
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| Title: | Reaction of bermudagrass selections to spring dead spot, 1989-1991 |
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| Source: | Biological and Cultural Tests for Control of Plant. Vol. 7, 1992, p. 106. |
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| Publishing Information: | St. Paul, MN: The American Phytopathological Society |
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| # of Pages: | 1 |
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| Keywords: | TIC Keywords: Cynodon dactylon; Spring dead spot; Ophiosphaerella herpotricha
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| Abstract/Contents: | "Thirty-one selection of bermudagrass were established from stolons or seed at the Horticultural Research Center, Wichita in a Canadian Waldeck sandy loam in May 1986. Selections were planted in 10 X 10 ft plots in a randomized complete block design with three replicates. Turfgrass in each plot was inoculated with oates infested with Ophiosphaerella herpotricha in Sep 87. Symptoms of spring dead spot initially developed in May 89. Disease severity was rated 10 May 89, 31 May 90 and 8 May 91 by recording the number of dead spots, the percent area of each plot damaged by the disease, and overall turf quality (90 and 91 only). In 91, an estimation of disease intensity was determined by recording the percent of turfgrass killed within the diseased patches. Disease severity was generally low for all selections in May 89. This may be the result of a 3- to 4-year lag period between inoculation and extensive root colonization by the pathogen. Severe cold temperatures (-17 F) in Dec 89 resulted in extensive damage and/or mortality to all bermudagrass selections except Midiron, Midlawn, Midfield, A-29, and Guymon. Spring dead spot severity ratings were similar among these selections. In May 91, significant differences in spring dead spot severity were detected among surviving selections. Midiron, Midlawn, Midfield, Midway and A-29 generally had the fewest number of dead spots, the lowest percentage of plot area damaged, and the highest turf quality. These selections also had the lowest proportion of turfgrass killed within the patches. Summer turf quality ratings (data not shown) suggest that the small patch size and the large proportion of living stolons of Midiron, Midfield and Midlawn in diseased patches allow these selections to recover more rapidly from spring dead spot during active bermudagrass growth." |
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| Language: | English |
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| References: | 0 |
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| Note: | Table
This item is an abstract only! |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Tisserat, N., and J. Pair. 1992. Reaction of bermudagrass selections to spring dead spot, 1989-1991. Biol. Cult. Tests Control Plant Dis. 7:p. 106. |
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