Full TGIF Record # 21670
Item 1 of 1
Publication Type:
i
Report
Author(s):Nelson, Eric B.; Craft, Cheryl M.
Title:Identification and comparative pathogenicity of pythium spp. from roots and crowns of turfgrasses exhibiting symptoms of root rot
Section:Disease management
Other records with the "Disease management" Section
Source:1989-90 Cornell University Turfgrass Research Report. 1990, p. 95-98.
# of Pages:4
Publishing Information:[Ithaca], NY: Cornell University
Keywords:TIC Keywords: Disease severity; Pythium; Genetic variability; Pythium root rot; Agrostis stolonifera; Poa annua; Disease surveys; Lolium perenne; Pythium diseases
Abstract/Contents:"Pythium species were recovered from roots and crwons of creeping bentgrass and annual bluegrass and their pathogenicity was determined under laboratory, growth chamber and field conditions. Of the 121 isolates of Pythium recovered from diseased roots and crowns, 46 were pathogenic (disease rating > 2.0) in laboratory experiments (Table 1). Of the pathogenic species, Pythium graminicola was isolated most frequently (18.2% of all isolates) and nearly all isolates tested were highly pathogenic to creeping bentgrass and perennial ryegrass. Additional pathogenic species recovered were isolates of P. aphanidermatum, P. aristosporum, P. torulosum, and P. vanterpoolii. These species were recovered at frequencies of 6.6, 2.5, 4.1, and 5.0% of all solates, respectively. At least one isolate within each species group was highly pathogenic to creeping bentgrass. Pythium torulosum was the most frequently-recovered species from turfgrass roots and crowns but nearly all isolates were non-pathogenic. Five pathogenic isolates of P. torulosum were recovered and, with the exception of one isolate, all were only weakly pathogenic to creeping bentgrass at 13 or 28 C (Table 2)."
Language:English
References:0
Note:Tables
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Nelson, E. B., and C. M. Craft. 1990. Identification and comparative pathogenicity of pythium spp. from roots and crowns of turfgrasses exhibiting symptoms of root rot. Cornell Turfgrass Ann. Rep. p. 95-98.
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