title: Fungicide Sensitivity and Characterization of Cobweb Disease on a Pleurotus eryngii Mushroom Crop Caused by Cladobotryum mycophilum.
abstract: In 2009-2010, unusual symptoms were observed on Pleurotus eryngii grown in mushroom farms in Gyeongnam Province, Republic of Korea. One of the main symptoms was a cobweb-like growth of fungal mycelia over the surface of the mushroom. The colonies on the surface rapidly overwhelmed the mushrooms and developed several spores within 3-4 days. The colonized surface turned pale brown or yellow. The fruit body eventually turned dark brown and became rancid. Koch's postulates were completed by spraying and spotting using isolated strains. The phylogenetic tree obtained from the internal transcribed spacer sequence analysis showed that the isolated fungal pathogen corresponded to Cladobotryum mycophilum (99.5%). In the fungicide sensitivity tests, the ED50 values for the isolate with respect to benomyl and carbendazim were from 0.29 to 0.31 ppm. Benzimidazole fungicides were most effective against C. mycophilum, a causal agent of cobweb disease in P. eryngii.
authors.affiliation: Environment-Friendly Research Division, Gyeongsangnam-do Agricultural Research and Extension Service, Jinju 660-360, Korea.
authors.forename: Min Keun
authors.initials: MK
authors.lastname: Kim
authors.affiliation: Environment-Friendly Research Division, Gyeongsangnam-do Agricultural Research and Extension Service, Jinju 660-360, Korea.
authors.forename: Su Won
authors.initials: SW
authors.lastname: Seuk
authors.affiliation: Environment-Friendly Research Division, Gyeongsangnam-do Agricultural Research and Extension Service, Jinju 660-360, Korea.
authors.forename: Young Han
authors.initials: YH
authors.lastname: Lee
authors.affiliation: Korea Research Institute of Bioscience and Biotechnology, Daejeon 305-806, Korea.
authors.forename: Hye Ran
authors.initials: HR
authors.lastname: Kim
authors.affiliation: Department of Food Science, Gyeongnam National University of Science and Technology, Jinju 660-758, Korea.
authors.forename: Kye Man
authors.initials: KM
authors.lastname: Cho
keywords: Cladobotryum mycophilum; Pleurotus eryngii; cobweb disease; fungal pathogen; fungicides