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| Publication Type:
| Report |
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| Author(s): | Brede, A. D.;
Harris, T. N. |
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| Author Affiliation: | Jacklin Seed Company, Post Falls, ID. |
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| Title: | Varietal Differences in Ergot Resistance in Kentucky Bluegrass Seed Production, 1987 |
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| Source: | Biological and Cultural Tests for Control of Plant. Vol. 3, 1988, p. 75. |
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| Publishing Information: | St. Paul, MN: The American Phytopathological Society |
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| Keywords: | TIC Keywords: Varieties; Ergot; Resistance; Poa pratensis; Seed production; Claviceps purpurea; Earliness
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| Abstract/Contents: | "Ninety two commercial and experimental breeding lines of Kentucky bluegrass were established in an unmowed, field, seed production trial near Post Falls, ID. Three replicates, each 1 meter in length, separated by 0.3 meter, were established in a randomized complete block experimental design in May 1986. No seed was harvested in 1986, but the stubble was field burned in August 1986. The plot area received irrigation and fertilization appropriate to bluegrass seed production. A natural infection of ergot occurred in early June 1987 and was evaluated in two ways: (1) quantity of ergot "honey dew" was rated tactually on June 27, 1987 on a 1 to 9 scale, with 9 equal to heavy honey dew, and (2) counts of ergot sclerotia per 5 grams of cleaned seed. Heading (inflorescence production) was rated on two dates, May 4 and 15, on a percentage scale, with 0 equal to no visible seedheads and 100 equal to mature, flowering seedheads. Seed yeild per acre was estimated, but results are presented herein only as correlation coefficients. Ergot sclerotia counts in the clean seed did not significantly correlate with heading date; this finding contradicts popular beliefs. Grass seed farmers generally feel that earlier maturing varieties escape ergot infection. These results indicate that true varietal resistance, not just pathogen avoidance, may be present in Kentucky bluegrass varieties. A significant negative correlation was found between the tactile honey dew rating and the percent heading on both dates. Therefore, earliness had some effect on secondary spread of ergot. Huntsville, an early maturing variety, and Glade, a late maturing variety, both showed good resistance to ergot. This trial points out the need for further study of ergot in turfgrass seed production and for the breeding and selection of ergot resistant varieties." |
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| Language: | English |
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| References: | 0 |
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| Note: | Full text as abstract.
Tables |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Brede, A. D., and T. N. Harris. 1988. Varietal Differences in Ergot Resistance in Kentucky Bluegrass Seed Production, 1987. Biol. Cult. Tests Control Plant Dis. 3:p. 75. |
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