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| Publication Type:
| Report |
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| Author(s): | Gelernter, Wendy;
Stowell, Larry J. |
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| Author Affiliation: | Editors, PTRI 1998 Turfgrass Research Report |
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| Title: | Evaluation of fungicides and wetting agents for the management of localized dry spot and fairy ring |
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| Section: | Diseases and nematode management
Other records with the "Diseases and nematode management" Section
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| Source: | PTRI 1998 Turfgrass Research Report. 1998, p. 22-28. |
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| Publishing Information: | San Diego, CA: PACE Turfgrass Research Institute |
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| # of Pages: | 7 |
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| Keywords: | TIC Keywords: Localized dry spots; Fungicides; Wetting agents; Agrostis stolonifera
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| Cultivar Names: | Pennlinks |
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| Abstract/Contents: | "In a replicated field trial conducted on a bentgrass (Pennlinks) practice putting green at Del Mar Country Club, Rancho Santa Fe, CA, the wetting agents Respond and Primer and the fungicides Heritage and ProStar werre evaluated for their ability to control localized dry spot (LDS) and fairy ring caused by the fungus Agrocybe pediades. Key results included: The fungus Agrocybe pediades, which produces small brown mushrooms, was identified from non-treated plots. This fungus is frequently associated with fairy ring symptoms in Southern California. Two types of symptoms were detected in the plots: 1) Type B fairy ring symptoms: dark green circles of stimulated turf growth, with thatch degradation leading to low spots in the turf, and 2) Type C fairy ring (also frequently called localized dry spot) symptoms: dry spots with irregular areas of dead or dying turf and extreme hydrophobicity underneath. Respond G and Primer significantly reduced the incidence of LDS (Type C fairy ring) symptoms. However these products applied by themselves had no effect on the incidence of Type B fairy ring symptoms. Both Type B and Type C fairy ring symptoms were controlled best by monthly applications of ProStar (6 oz/1000 sq ft) plus the wetting agent Respond (3 oz/1000sq ft) (no post-treatment irrigation) and by monthly applications of Heritage (0.4 oz/1000 sq ft), with or without post-treatment irrigation, and Heritage plus Respond (with no post-treatment irrigation). It is important to note that while wetting agents can manage the symptoms of LDS (as can cultural practices such as verticutting, aerification, topdressing and hand watering), a fungicide such as ProStar or Heritage is necessary to kill the fungus that causes dry spot and fairy ring. For reasons that are not clear, turf phytotoxicity occurred when monthly applications of ProStar (6 oz/1000 sq ft) were made without the addition of Respond L. This appears to be a unique observation, since ProStar is typically applied on golf courses, including Del Mar Country Club, under these same conditions with no negative results. We are working with AgrEvo to better understand this effect." |
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| Language: | English |
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| References: | 0 |
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| See Also: | Other items relating to: LDS
Other items relating to: FAIRY
Other items relating to: Wetting Agents
Other items relating to: Fairy Rings |
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| Note: | Cooperator: David Major, Del Mar Country Club
Figures
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Gelernter, W., and L. J. Stowell. 1998. Evaluation of fungicides and wetting agents for the management of localized dry spot and fairy ring. Turfgrass Res. Rep. p. 22-28. |
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