Full TGIF Record # 15687
Item 1 of 1
Publication Type:
i
Proceedings
Author(s):Couch, Houston B.
Author Affiliation:Dept. of Plant Pathology, Physiology and Weed Science; Virginia Polytechnic Institute and State University, Blacksburg, VA.
Title:Synergism ... A new dimension in turfgrass fungicide use
Meeting Info.:Vancouver, British Columbia, Cananda: March 12-15, 1989
Source:Canadian Turfgrass Conference & Show. Vol. 40, March 1989, p. 53-56.
Publishing Information:Toronto, Canada: Canadian Golf Superintendents Association
# of Pages:4
Keywords:TIC Keywords: Synergism; Fungicides; Tank mix; Dollar spot; Sclerotinia homoeocarpa; Microdochium patch; Powdery mildew; Erysiphe graminis; Pythium aphanidermatum; Formulations
Abstract/Contents:"SUMMARY: 1) Where disease control effectiveness is concerned, when fungicides that are toxic to the same target organism but have different modes of action are mixed together in a spray tank, one of three conditions will result: the mixture will be additive, antagonistic, or synergistic. 2) The components of additive mixtures act independently. Therefore, in the absence of synergism, the sum of the control of a reduced rate mixture will be less than the control provided by the full label rate of the most effective fungicide in the mixture. 3) Synergism for the control of Sclerotinia dollar spot offers possibilities for reducing the risk of fungicide resistance. In the case of Pythium blight, the synergistic combinations that have been identified will not only reduce the possibility of resistance, but will also provide a more effective level of control during seasons of heavy disease pressure, or in situations where curative control programs are needed. 4) In considering the use of established synergistic combinations, it must be remembered that these mixtures should not be used at dosages less than the low label rate for each component. 5) The most appropriate procedures for reducing the risk of resistance are a) the use of tank mixes of fungicides with different modes of action that are known to be synergistic, or b) a system of fungicide rotation. With the later system, fungicides with different modes of action that show activity against the pathogen in question should be alternated with each other at their full label rates."
Language:English
References:0
Note:Reprint appears in The Turf Line News, Vol. 98 April/May 1990, p. D1-D4
Partial reprint appears in MVTA, April/May 1990, p. 4, with variant introduction
Tables
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Couch, H. B. 1989. Synergism ... A new dimension in turfgrass fungicide use. p. 53-56. In Canadian Turfgrass Conference & Show. Vancouver, British Columbia, Cananda: March 12-15, 1989. Toronto, Canada: Canadian Golf Superintendents Association.
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