Full TGIF Record # 21679
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Publication Type:
Author(s):Nelson, Eric B.
Author Affiliation:Department of Plant Pathology, Cornell University
Title:Pathogenicity of root-infecting Pythium spp. on creeping bent grass (Agrostis palustris) turf
Section:Disease management
Other records with the "Disease management" Section
Source:1989-90 Cornell University Turfgrass Research Report. 1990, p. 110-112.
# of Pages:3
Publishing Information:[Ithaca], NY: Cornell University
Keywords:TIC Keywords: Pythium; Disease severity; Genetic variability; Agrostis stolonifera; Pythium root rot; Disease surveys; Pathogens; Pythium diseases
Abstract/Contents:"Over 200 Pythium species have been isolated from roots of turf specimens collected from various golf course putting greens and fairways in New York State. Isolates were cultured, purified, and selected strains identified in the laboratory by established procedures. Previously, we have been unable to reproduce adequate symptoms on turfgrasses following inoculation with potential root-rotting Pythium spp. In this report, we have developed an efficient and reliable means of screening Pythium isolates for pathogenicity to turfgrasses. Pythium species recovered from roots included P. aphanidermatum, P. graminicola, P. aristosporum, P. torulosum, P. vanterpoolii, and P. catenulatum. However, essentially the only species pathogenic in tissue culture plate tests were isolates were more virulent at cool (13C) temperatures than at high (28C) temperatures. The only exception was P. aphanidermatum which was more virulent at high than at low temperatures. Results are summarized in the attached figures. Growth chamber pathogenicity tests failed to reveal differences in pathogenic isolates. This was due, in part, to the prolonged excessive moisture conditions during the experiment. It appears that anaerobic conditions led to the development of bacterial contamination resulting in the accumulation of phytotoxic metabolites since all plants were damaged in the experiment."
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Nelson, E. B. 1990. Pathogenicity of root-infecting Pythium spp. on creeping bent grass (Agrostis palustris) turf. Cornell Turfgrass Ann. Rep. p. 110-112.
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