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| Web URL(s): | https://listings.lib.msu.edu/nwtgc/1988.pdf#page=20
Last checked: 01/17/2017
Requires: PDF Reader |
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| Publication Type:
| Proceedings |
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| Author(s): | Chastagner, Gary |
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| Author Affiliation: | Associate Plant Pathologist, Washington State Univ., Puyallup Research and Extension Center, Puyallup, WA |
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| Title: | Susceptibility of turfgrasses to necrotic ring spot |
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| Meeting Info.: | September 19-22, 1988 |
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| Source: | Proceedings of the 42nd Northwest Turfgrass Conference. Vol. 42, December 1988, p. 14-20. |
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| Publishing Information: | Spokane, WA: Northwest Turfgrass Association |
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| Keywords: | TIC Keywords: Necrotic ring spot; Variety trials; Research; Susceptibility; Seedlings
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| Abstract/Contents: | A series of greenhouse tests were undertaken to determine the susceptibility of 25 bentgrass, 53 Kentucky bluegrass, 42 fine leaf fescue, 38 perennial ryegrass and 27 tall fescue cultivars to "Leptosphaeria korrea. Two isolates of L. korrea were used to infest a potting medium which was then seeded to the various cultivars tested. Replicate pots of each cultivar were then placed in a greenhouse maintained at 20 deg C (68F). After 59-79 days, the plants were examined and the percentage of seedlings that survived for each cultivar grown in the infested medium were compared to the survival when the seedlings of the same cultivar were grown in noninfested media." There was considerable variation in the results between different species, within a species, and between the same cultivar with the two isolates of L. korrae. Survival was rated as the average percentage of seedling survival in the L. korrea infested samples divided by the average percentage survival in the control samples of the same cultivar. Survival of bentgrass seedlings ranged from 3.1 to 31.1%, with bentgrass Emerald (30.7%) the best. Survival of Kentucky bluegrass seedlings ranged from 5.7 to 53.5%, with Eclipse (50.7%), Fylking (50.0%), and Ram I (53.5%) the best. Survival of fine leaf fescues ranged from 13.5 to 71.3%, with Jamestown (71.3%), and Flyer the best. Survival of perennial ryegrass seedlings ranged from 49 to 92.4%, with Gator (92.4%), Allstar (87.5%), Pennfine (80.9%), and Pennant (78.2%) the best. Survival of tall fescue seedlings ranged from 37.4 to 91.3%, with Houndog (91.3%), 5GL (90.3%) the best. A second study was established to evaluate cultivar susceptibility at two sod farms and a third study under field conditions in the northeastern United States. Plantings of 86 Kentucky bluegrass cultivars at Ithaca, New York, and 93 Kentucky bluegrass cultivars at Riverhead, New York (3 replications per cultivar) were inoculated with a single isolate of L. korrea. The turf at both sites was 5 years old. Another similar field study was conducted at Farmingdale, New York. Greenhouse ratings were very poor indicators of field susceptibility. It is not possible now to make recommendations of specific cultivars on the basis of current research. Turf managers should avoid using cultivars that appear to be highly susceptible under field conditions. |
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| Language: | English |
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| References: | 12 |
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| Note: | Tables |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Chastagner, G. 1988. Susceptibility of turfgrasses to necrotic ring spot. p. 14-20. In Proceedings of the 42nd Northwest Turfgrass Conference. September 19-22, 1988. Spokane, WA: Northwest Turfgrass Association. |
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| Web URL(s):
https://listings.lib.msu.edu/nwtgc/1988.pdf#page=20
Last checked: 01/17/2017
Requires: PDF Reader |
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MSU catalog number: SB 433 .N6 no. 42 |
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