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http://dx.doi.org/10.5423/RPD.2018.24.1.75

Fusarium Wilt Caused by Fusarium oxysporum on Passionfruit in Korea  

Joa, Jae-Ho (Citrus Research Institute, National Institute of Horticultural and Herbal Science)
Choi, In-Young (Jeollabuk-do Agricultural Research and Extension Services)
Choi, Min-Kyung (Jeollabuk-do Agricultural Research and Extension Services)
Heo, Byong-Soo (Jeollabuk-do Agricultural Research and Extension Services)
Jang, Jong-Ok (Citrus Research Institute, National Institute of Horticultural and Herbal Science)
Shin, Hyeon-Dong (Division of Environmental Science and Ecological Engineering, Korea University)
Publication Information
Research in Plant Disease / v.24, no.1, 2018 , pp. 75-80 More about this Journal
Abstract
From 2014 to 2016, Fusarium wilt disease was found on fassionfruit in Iksan and Jeju, Korea. Symptoms included wilting of foliage, drying and withering of leaves, and stunting of the plants. The infected plants eventually died during growth. Colonies on potato dextrose agar were pinkish white, and felted with cottony and aerial mycelia with 35 mm after one week. Macroconidia were falcate to almost straight, thin-walled and usually 2-3 septate. Microconidia were usually formed on monophialides of the hyphae and were hyaline, smooth, oval to ellipsoidal, aseptate or medianly 1-septate, very occasionally 2-septate, slightly constricted at the septa, $3-12{\times}2.5-6{\mu}m$. On the basis of the morphological characteristics and phylogenetic analyses of two molecular markers, internal transcribed spacer rDNA and translation elongation factor $1{\alpha}$, the fungus was identified as Fusarium oxysporum. Pathogenicity of a representative isolate was proved by artificial inoculation, fulfilling Koch's postulates. To our knowledge, this is the first report on the occurrence of F. oxysporum on fassionfruit in Korea.
Keywords
Fusarium oxysporum; Fusarium wilt; Passiflora edulis; Passionfruit;
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