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| Web URL(s): | http://web.archive.org/web/20061205204057/http://www.uoguelph.ca/GTI/itsweb/proceedings.pdf#page=34 Last checked: 05/23/2017 Requires: Adobe Acrobat Notes: Document is within a single large file |
| Publication Type: | Report |
| Content Type: | Abstract or Summary only |
| Author(s): | Wetzel, H. C. III |
| Author Affiliation: | North Carolina State University |
| Title: | The impact of fertilizers and fungicides on the incidence and severity of bentgrass dead spot |
| Section: | Abstracts Other records with the "Abstracts" Section |
| Meeting Info.: | Toronto, Ontario, Canada: 15-21 July, 2001 |
| Source: | IXth International Turfgrass Research Conference. Vol. 9, 2001, p. 71. |
| Publishing Information: | [Toronto, Canada]: International Turfgrass Society |
| # of Pages: | 1 |
| Keywords: | TIC Keywords: Fertilizers; Fungicides; Disease severity; Fall spot of bentgrass; Ophiosphaerella agrostis; Agrostis stolonifera; Golf greens; Golf courses; Nitrogen fertilizers; Chlorothalonil; Nitrogen; Potassium; Avena sativa; Fungicide combinations; Sand-based golf greens |
| Cultivar Names: | Cato |
| Abstract/Contents: | "Bentgrass dead spot (BDS), incited by Ophiosphaerella agrostis Dernoeden, Câmara, O'Neill, van Berkum, & Palm, was documented in 1999 in North Carolina, South Carolina, and Georgia on newly established creeping bentgrass (Agrostis stolonifera L.) putting greens. A study was designed to evaluate the effects of nitrogen source, K2 SO4 , and the curative properties of a 50% chlorothalonil plus 16.7% thiophanatemethyl (16.4 kg ai ha-1 applied on a 7-d interval) fungicide on the incidence and severity of BDS. Turf was a newly established, methyl bromide fumigated, 'Cato' creeping bentgrass sand-based research green. Nitrogen and potassium were applied in a 1:1 ratio to deliver a total of 390 kg ha-1 yr-1 of each element. Point inoculations were made on 16 October 1999 with O. agrostis-colonized oat (Avena sativa L.) grains. Symptoms of BDS were first noted on 24 June 2000. Curative fungicide applications were initiated on 28 June and continued for 5-wk. The K2SO4 had no influence on BDS incidence or severity. Symptoms of BDS failed to develop in (NH4)2SO4 and Country Clubä 16-4-8 (N source consisting of (NH42SO4 & NH4H2PO4) treated, but were pronounced in NaNO3, NH4NO3, and urea (CO(NH2)2)-treated plots. Ratings from 5 July to 1 December demonstrated that BDS incidence and severity (avg. no. & diam. of infection centers per 1.5 m2, respectively) was significantly less in NaNO3 (2 & 17 mm) when compared to NH4NO3 (5 & 36 mm) and urea (4 and 31 mm)-treated plots. Consequently, BDS infection centers in the fungicide treated NaNO3 plots healed 28 days after the initial fungicide treatment (DAIFT) as compared to 35 DAIFT for NH4NO3 and urea-treated plots." |
| Language: | English |
| References: | 0 |
| Note: | This item is an abstract only! |
| ASA/CSSA/SSSA Citation (Crop Science-like – may be incomplete): | Wetzel, H. C. III. 2001. The impact of fertilizers and fungicides on the incidence and severity of bentgrass dead spot. Int. Turfgrass Res. Conf. 9:p. 71. |
| Fastlink to access this record outside TGIF: | http://tic.msu.edu/tgif/flink/RECNO/74461 |
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| Web URL(s) : | http://web.archive.org/web/20061205204057/http://www.uoguelph.ca/GTI/itsweb/proceedings.pdf#page=34 Last checked: 05/23/2017 Requires: Adobe Acrobat Notes: Document is within a single large file |
| MSU catalog number: | Uncataloged - Ask at TIC |
| Find from within TIC: | Digitally in TIC by file name: intrp2001 |
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