ABSTRACT
During 2007 survey of post-harvest diseases of yam performed in May and June, severe tuber loss caused by blue mold was observed in Iksan, Cheonbuk Province. Two species of Penicillium were isolated from the infected tubers. Based on beta-tubulin gene sequence analysis, and cultural and morphological characteristics, the isolates were identified as Penicillium sclerotigenum and P. polonicum. P. sclerotigenum, which is a novel to Korea, is presently described and illustrated.
Subject(s)
Dioscorea , Fungi , Korea , Penicillium , Sequence Analysis , TubulinABSTRACT
Grape fruits with blue mold symptoms were collected from house storages in different locations in Korea and were investigated for their association with Penicillium species. A total of 12 isolates of Penicillium were isolated from the collected fruits. Based on morphological and cultural characteristics and beta-tublin gene sequence data analysis, they were identified as P. bialowiezense, P. citrinum, P. echinulatum, P. expansum, P. solitum and unidentified Penicillium species. P. solitum was the predominant followed by P. expansum. P. bialowiezense and P. echinulatum were newly recorded in Korea. beta-Tubulin gene sequences could be used to distinguish each species of Penicillium and the molecular groups were correlated well with the morphological species. The unidentified species was supposed to be a new species, not previously reported in literature.
Subject(s)
Cultural Characteristics , Fruit , Fungi , Korea , Penicillium , Statistics as Topic , Tubulin , VitisABSTRACT
The isolation of a causal pathogen from pear fruits showing lesions of blue mold was carried out, which were preserved in the packinghouse of Anseong for the export to the United States. When the lesion of pears (Pyrus pyrifolia Niitaka) was checked in packinghouse, their fruit epidermis over decayed parts varied from light tan to dark brown. Also, the decayed flesh was soft and watery, and separated easily from the healthy tissue. Based on the cultural and morphological characteristics, the fungus (IL-12 isolate) was identified as Penicillium aurantiogriseum. This is the first report associated with blue mold of pear caused by P. aurantiogriseum in Korea.
Subject(s)
Epidermis , Fruit , Fungi , Korea , Penicillium , Pyrus , Triacetoneamine-N-Oxyl , United StatesABSTRACT
Para avaliar a eficiência de quatro fungicidas sobre a inibição do desenvolvimento de Penicillium expansum, foi desenvolvido um experimento em laboratório na Universidade Federal de Santa Maria, RS, durante o ano de 1992. Foram testados os princípios alivos Tiabendazole, Tiofanato Metílico, Iprodione e Imazalil, em cinco concentrações sobre dois isolados do fungo, sendo um resistente e outro sensível aos benzimidazóis. Foram testadas as concentrações de 0,1; 0,5; 1,0; 5,0 e l0.0mg/ml dos princípios ativos, e as avaliações/oram realizadas com 0; 48;96, 144 e 192 horas após as repicagens. Os resultados demonstraram que não houve diferença na inibição do desenvolvimento entre os fungicidas sobre o isolado sensível, porém ocorreu diferença entre os produtos para o isolado resistente, sendo o Tiabendazole e o Tiofanato Metílico os que apresentaram a menor eficiência. O Iprodione mostrou-se eficiente sobre os dois isolados e, o Imazalil inibiu completamente o desenvolvimento do fungo nas concentrações de 5,0 e 10mg/ml até as 192 horas.
This experiment was conducted to evaluate lhe effïciency of four fungicides in the development inhibition of Penicillium expansum. A laboratory experiment was carried out in 1993, at Federal University of Santa Maria, RS. The fungicides Thiabendazol, Methyl Tiophanate, Iprodione and Imazalil, infive concentrations of active ingredients (0.1; 0.5; 1.0; 5.0 and 10mg/ml) on two isolates of the fungus were tested. The diametersof pathogen colonies were measured at 0; 48; 96, 144 and 192 hours after pathogen plating. There were no statistical differences in the inhibitions of benzimidazols compounds to sensible isolate among fungicides. There were significant difference for the resistant isolate, with less effïcience for Thiabendazol and Methyl Tiophanate fungicides. The Iprodione showed effïcience on the two isolates, and only Imazalil demonstrated complete inhibition of Penicillium expansum colonies. with 5.0 and 10mg/ml concentration at a time of 192 hours, after pathogen plating.