Full TGIF Record # 269910
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Web URL(s):https://archive.lib.msu.edu/tic/its/articles/1974sup26.pdf
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Publication Type:
Content Type:Abstract or summary only
Author(s):Cole, H. Jr.; Goldberg, C. W.
Author Affiliation:Pennsylvania State University
Title:Fungicide tolerance, a rapidly emerging problem in turfgrass disease control
Other records with the "Diseases" Section
Meeting Info.:Blacksburg, Virginia: June 19-21, 1973
Source:Abstracts of Papers Presented at the Second International Turfgrass Research Conference. 1973, p. 26.
Publishing Information:Blacksburg, Virginia: [International Turfgrass Society]
# of Pages:1
Keywords:TIC Keywords: Benomyl; Cadmium compounds; Disease control; Dollar spot; Fungicide evaluation; Fungicide resistance; Sclerotinia homoeocarpa; Thiabendazole; Thiophanate
Abstract/Contents:"During the 1972 growing season the first instance of lack of control of Sclerotinia dollarspot with benomyl was reported from an Akron, Ohio golf course in early July. This followed with similar reports from various locations in Illinois, New Jersey, and Pennsylvania. Isolates representative of S. homoeocarpa, on the basis of morphological characteristics, were obtained from diseased grass samples from these sites. When grown on autoclaved rye grain and inoculated on bluegrass and bentgrass varieties in the greenhouse, typical dollarspot lesions appeared from which isolates similar to the originals could be obtained. Tolerance was evaluated in terms of radial growth on benomyl amended agar. Isolates from the control failure locations were 100 times as tolerant as isolates from areas where no control difficulties had been experienced. Usually benomyl concentrations of 1 ug/ml of agar completely inhibited growth of S. homoeocarpa. All tolerant isolates exhibited growth at 100 ug/ml, but all were totally suppressed at the next increment of 1000 ug/ml. Isolates tolerant to benomyl were also tolerant to thiabendazole, thiophanate M, thiophanate E, and methyl [l-[[(5-cyanopentyl)amino]carbonyl]-1H-benzimidazol-2yL] carbamate . Most of these isolates were not tolerant to cadmium compounds, however, one isolate from Illinois was also highly tolerant to cadmium. None of the benzimidazole tolerant isolates were tolerant to triarimol. It is not known how wide spread the problem will become in succeeding years, however, if current trends continue Sclerotinia dollarspot Is going to cause major difficulties for turfgrass managers in the years ahead. Tolerance among other pathogens is also likely to become evident."
Note:This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Cole, H. Jr., and C. W. Goldberg. 1973. Fungicide tolerance, a rapidly emerging problem in turfgrass disease control. Int. Turfgrass Soc. Annexe - Tech. Pap. p. 26.
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    Last checked: 03/15/2016
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