ABSTRACT: Petri and esca disease fungi in declining grapevines in Pennsylvania and New York

2003. Elwin L. Stewart, Nancy G. Wenner, Leslie A. Long, and Barrie E. Overton. Phytopathology 93:S81. Publication no. P-2003-0593-AMA.

A Penn State survey conducted during 2001-2 evaluated grapevine decline across Pennsylvania and in the Finger Lakes and Lake Erie regions of New York due to fungi, viruses, and nematodes. Symptoms of Petri and Esca disease were found at most of the 27 locations surveyed. Declining vines were collected from survey sites for laboratory analysis. Phaeomoniella chlamydospora, Phaeoacremonium aleophilum , and Phaeoacremonium angustius , and an undescribed Phaeoacremonium sp. were recovered from symptomatic vines from 16/18 sites sampled and from 18 different cultivars including Vitis vinifera, Vitis labrusca , and French American hybrids ranging from 3-45 years old. Isolates were identified based on previous descriptions and by internal transcribed spacer (ITS1 -5.8S - ITS2) rDNA sequences. Phialophora verrucosa , Cadophora spp., Cylindrocarpon destructans , Cylindrocarpon sp., Phomopsis spp., Verticillium sp., Gliocladium sp., and Fusarium graminearum , F. proliferatum , F. tricinctum , and F. oxysporum were also frequently isolated and identified based on morphology.