Occurrence of Cylindrocarpon spp. in Nursery Grapevines in California

S. Dubrovsky, A.L. Fabritius


Cylindrocarpon liriodendri and C. macrodidymum are causal agents of black foot disease of grapevines
in California. Together with Phaeoacremonium spp. and Phaeomoniella chlamydospora, Cylindrocarpon spp. are
also known to be associated with decline of young vines. Infected vineyard soils are one source of the Cylindrocarpon
infections, but nurseries have also been shown to contribute to the origin of the inoculum. To study incidence of
Cylindrocarpon spp. in nursery grapevines in California, randomly selected, non-symptomatic grapevines from various
nurseries were tested in a PCR assay for the presence of Cylindrocarpon spp. Results of this study suggested
that Cylindrocarpon spp. are the most common pathogens associated with young nursery vines in California, being
detected in 26% of the samples. Phaeoacremonium aleophilum was found in 19% and P. chlamydospora in 4% of the
nursery samples.

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DOI: http://dx.doi.org/10.14601/Phytopathol_Mediterr-1859

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