ergot

Evaluation of Ergot Resistance and Disease Escape in Kentucky Bluegrass Cultivars

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Series/Report number: 
COARC2016
Abstract: 
Ergot is an important disease of Kentucky bluegrass seed production in Oregon. The disease is caused by the fungal pathogen Claviceps purpurea, which infects flowers prior to fertilization resulting in the production of sclerotia rather than seed. Sclerotia are the overwintering structures of the fungus and produce airborne ascospores that serve as primary inoculum the following growing season. In some years the timing of ascospore release by the fungus may not coincide with grass flowering (anthesis), which is the only period of host susceptibility, and cultivars with short, uniform flowering periods, or those that flower outside of periods of peak spore production, may potentially escape infection. The objective of this study was to evaluate Kentucky bluegrass cultivars for the potential to escape or resist ergot under central Oregon field conditions. It was hypothesized that cultivars which flower before or after peak ergot spore production, or those with shortened periods of anthesis, would have reduced ergot incidence and severity compared to cultivars with prolonged periods of anthesis or those which flower when ergot spores are present in large numbers.

Studies on Epidemiology of Ergot in Kentucky Bluegrass

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Series/Report number: 
COARC 2011

Effects of Weather Conditions on Ergot in Kentucky Bluegrass in Central Oregon

Central Oregon Agricultural Research Center 2009 Annual Report
Series/Report number: 
0902

Development of Control Program for Claviceps Purpurea in Kentucky Bluegrass Seed Production

Central Oregon Agricultural Research Center 1993 Annual Report
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Series/Report number: 
930

Ergot Control Program for Kentucky Bluegrass Seed Production

Central Oregon Agricultural Research Center 1992 Annual Report
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Series/Report number: 
922

Distribution of Ergot (Claviceps purpurea) Among Kentucky Bluegrass Grown for Seed

Central Oregon Agricultural Research Center 1992 Annual Report
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Series/Report number: 
922

Evaluation of Fungicides for Control of Ergot in Kentucky Bluegrass, 1998

Central Oregon Agricultural Research Center 1998 Annual Report
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Series/Report number: 
1003

Role of Insects in the Development of Ergot in Kentucky Bluegrass Grown for Seed in the Pacific Northwest, 1998

Central Oregon Agricultural Research Center 1998 Annual Report
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Series/Report number: 
1003

Role of Insects in the Development of Ergot in Kentucky Bluegrass Grown for Seed in the Pacific Northwest, 1996

Central Oregon Agricultural Research Center 1998 Annual Report
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Series/Report number: 
1003
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