caa a22 4500 467890889 CHVBK 20180406152748.0 cr unu---uuuuu 170328e20060801xx s 000 0 eng 10.1007/s10327-006-0272-1 doi (NATIONALLICENCE)springer-10.1007/s10327-006-0272-1 Frequency of Alternaria brassicicola in commercial cabbage seeds in Japan [Elektronische Daten] [Masaharu Kubota, Kazuo Abiko, Yukio Yanagisawa, Kazufumi Nishi] Plug seedlings, widely used in cabbage cultivation in Japan, are often infected by seed-borne pathogens, especially the serious pathogen Alternaria brassicicola. Because information on seed infestation is scant in Japan, we investigated fungal infestation in commercial batches of cabbage seeds produced between 1984 and 2001. A total of 123 lots were divided into six groups by production period (1984-1989, 1994-1998, and 2001) and by use or nonuse of fungicide. One hundred seeds from each lot were incubated separately on agar at 25°C to isolate the predominant fungus. Alternaria brassicicola was isolated most frequently, 0%-94% of the seeds depending on seed lot or 6%-21% of the seeds grouped by production period and fungicide treatment. Thus, the pathogen was isolated even from seeds refrigerated for 17 years. Alternaria brassicicola accounted for 57%-95% of all isolated fungi by the group and was higher on older or fungicide-treated seeds. Seeds that were not treated with fungicide in lots grouped by production districts in western Japan were infested with A. brassicicola at a rate of over 12%, higher than that in the eastern region (<4%). Infestation was higher in the warmer areas of Japan. Eighty-five isolates, other than A. brassicicola, produced spots on cabbage cotyledons, although they were not isolated as frequently: less than 5% of seeds by group separated by production period and fungicide treatment. Most of these isolates were Alternaria alternata. This is the first report on the frequency of fungal infestation of commercial cabbage seeds in Japan. The Phytopathological Society of Japan and Springer-Verlag Tokyo, 2006 Cabbage seed nationallicence Fungal isolation nationallicence Japan nationallicence Alternaria brassicicola nationallicence Kubota Masaharu National Institute of Vegetable and Tea Science, 360 Kusawa Ano, 514-2392, Tsu, Japan aut Abiko Kazuo JA Zennou Shiga, Shiga, Japan aut Yanagisawa Yukio Gunma Seibu Agricultural Office, Takasaki, Japan aut Nishi Kazufumi National Institute of Vegetable and Tea Science, 360 Kusawa Ano, 514-2392, Tsu, Japan aut Journal of General Plant Pathology Springer-Verlag 72/4(2006-08-01), 197-204 1345-2630 72:4<197 2006 72 10327 https://doi.org/10.1007/s10327-006-0272-1 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10327-006-0272-1 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Kubota Masaharu National Institute of Vegetable and Tea Science, 360 Kusawa Ano, 514-2392, Tsu, Japan aut NATIONALLICENCE 700 1- Abiko Kazuo JA Zennou Shiga, Shiga, Japan aut NATIONALLICENCE 700 1- Yanagisawa Yukio Gunma Seibu Agricultural Office, Takasaki, Japan aut NATIONALLICENCE 700 1- Nishi Kazufumi National Institute of Vegetable and Tea Science, 360 Kusawa Ano, 514-2392, Tsu, Japan aut NATIONALLICENCE 773 0- Journal of General Plant Pathology Springer-Verlag 72/4(2006-08-01), 197-204 1345-2630 72:4<197 2006 72 10327 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer