| |
| Web URL(s): | http://archive.lib.msu.edu/tic/tgtre/article/1999jun1a.pdf
Last checked: 01/09/2013
Requires: PDF Reader |
|---|
| Publication Type:
| Professional |
|---|
| Author(s): | Vincelli, Paul |
|---|
| Author Affiliation: | Associate Extension Professor, Department of Plant Pathology, College of Agriculture, University of Kentucky, Lexington, Kentucky |
|---|
| Title: | Gray leaf spot: An emerging disease of perennial ryegrass |
|---|
| Section: | Pathology
Other records with the "Pathology" Section
|
|---|
| Source: | TurfGrass TRENDS. Vol. 7 [8], No. 6, June 1999, p. 1-8. |
|---|
| Publishing Information: | Cleveland, OH: Advanstar Communications |
|---|
| # of Pages: | 8 |
|---|
| Related Web URL: | http://archive.lib.msu.edu/tic/mitgc/article/2000136.pdf
Last checked: 06/22/2015
Requires: PDF Reader
Notes: Proceedings of the 70th Annual Michigan Turfgrass Conference partial reprint |
|---|
| Keywords: | TIC Keywords: Gray leaf spot; Lolium perenne; Disease profile; Symptoms; Scouting; Cultural methods; Disease development; Choice of cultivar; Nitrogen fertilizers; Mowing height; Clipping removal; Irrigation program; Fungicides; Preventive control; Application timing; Fungicide resistance
|
|---|
| Abstract/Contents: | Profiles gray leaf spot (Pyricularia grisea). Describes the symptoms of gray leaf spot, stating that "on established perennial ryegrass, the disease first appears as patches an inch or two in size and the leaf blades turn a reddish-borwn color...In extremely severe outbreaks, most or all of the turf is killed." Describes conditions favorable to gray leaf spot, including roughs and "'heat-sink' areas: southern slopes and areas where the turf is exposed to long periods of summer sunshine." Recommends that superintendents "concentrate on these areas when scouting for early activity of gray leaf spot." Discusses potential effects of cultural practices, noting that "cultural practices alone will not arrest this disease under high disease pressure and many superintendents will find it necessary to use fungicides preventively." Mentions the potential effects of nitrogen fertilization, mowing, variety selection, and other practices. States that "fungicidal protection is needed against this disease before it 'explodes' into a full-scale epidemic." Discusses the timing and efficacy of fungicides and mentions potential fungicide resistance. Suggests that "azoxystrobin and thiophanate-methyl are clearly key players for gray leaf spot control. However, superintendents are advised not to rely exclusively on these products for gray leaf spot control." States that "the most sensible use...is to apply them during the period of greatest risk - the period when logarithmic disease increase is likely - and to use Tier II products when the risk of disease is low to moderate." Concludes that "no matter where P. grisea originated from, it is clear that the disease is well-established in the transition zone and may constitute an endemic threat to areas further north." |
|---|
| Language: | English |
|---|
| References: | 0 |
|---|
| Note: | Partial reprint appears in TurfGrass TRENDS, 7[8](6) June 1999, p. 1-8
Partial reprint appears in STMA 11th Annual Conference and Exhibition, 2000, p. [177-181]
Partial reprint appears in Proceedings of the 70th Annual Michigan Turfgrass Conference, Vol. 29 2000, p. 136-138
Distributed within Golfdom of same date/year.
Figures
Tables |
|---|
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Vincelli, P. 1999. Gray leaf spot: An emerging disease of perennial ryegrass. TurfGrass Trends. 7 [8](6):p. 1-8. |
| Fastlink to access this record outside TGIF: https://tic.msu.edu/tgif/flink?recno=121986 |
| If there are problems with this record, send us feedback about record 121986. |
| Choices for finding the above item: |
|---|
| Web URL(s):
http://archive.lib.msu.edu/tic/tgtre/article/1999jun1a.pdf
Last checked: 01/09/2013
Requires: PDF Reader |
| 
MSU catalog number: SB 433 .T874 |
| Request through your local library's inter-library loan service (bring or send a copy of this TGIF record) |
