Full TGIF Record # 24513
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Publication Type:
i
Report
Author(s):Fidanza, M. A.; Potter, S. W.; Dernoeden, P. H.
Author Affiliation:Dept. of Agronomy, Univ. of Maryland, College Park, MD
Title:Control of Rhizoctonia spp. on a golf course fairway, 1991
Source:Fungicide and Nematicide Tests. Vol. 47, 1992, p. 315.
Publishing Information:St. Paul, MN: American Phytopathological Society
Keywords:TIC Keywords: Lolium perenne; Brown patch; Rhizoctonia solani; Rhizoctonia zeae
Abstract/Contents:"This study was conducted on a fairway at Woodholme Country Club in Pikesville, MD, which has had a history of being blighted by both R. solani and R. zeae. Treatments were applied in 1.0 gal water per 1000 ft2 using a wheel-driven pump sprayer (Paddock Master) equipped with two flood jet nozzles. Plots ran across the fairway and each plot measured 10 by 100 ft. Plots were arranged in a randomized complete block with four replications. Soil was loam with a pH of 5.8. Blight was rated using two methods as follows: (1) a 0 to 5 scale were [where] 0 = no visual blighting, 2.5 = unacceptable brown patch control and 5.0 = entire area brown or dead; and (2) a 0 to 100% linear scale where 0 = no visual blighting and 100 = entire plot area brown or dead. All fungicides were applied to the same plots on 27 Jun and 23 Jul 1991. Severe disease outbreaks occurred on or about 23 Jul when most blighting was attributed to R. solani and again on or about 8 Aug when most blighting was attributed to R. zeae. Blight between Rhizoctonia spp. was differentiated based on initial patch symptoms. For R. solani, blighted turf typically appear as a browning of foliage; whereas, R. zeae blight typically causes an initial yellowing before leaves die. On 23 Jul it has been 26 days since the fungicides had been applied. Ratings by the superintendent (i.e. the 0 to 5 scale) showed that all treatments except Daconil had provided commercially acceptable R. solani control. According to the second rating system (0 to 100% scale), Sentinel and ProStar had provided significantly better R. solani control when compared to Lynx and Banner. Daconil had provided no residual R. solani control after 26 days. The fungicides were reapplied on 23 Jul and a severe outbreak of R. zeae occurred on or about 4 Aug (i.e., 12 days followed the second application of treatments). No treatment provided commercially acceptable R. zeae control (i.e. <2.5). Daconil provided no control, but all other fungicides significantly reduced blighting. Best control was provided by Sentinel (19% blighting). ProStar, Banner and Lynx gave an equivalent level of R. zeae blight suppression."
Language:English
References:0
Note:Table
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Fidanza, M. A., S. W. Potter, and P. H. Dernoeden. 1992. Control of Rhizoctonia spp. on a golf course fairway, 1991. Fungicide Nematicide Tests. 47:p. 315.
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