Black Choke Disease of Warm Season Grasses Caused by Ephelis japonica in Japan and its Epiphytic Features

JARQ : Japan Agricultural Research Quarterly
ISSN 00213551
書誌レコードID(総合目録DB) AA0068709X
本文フルテキスト
42-03-06.pdf912.05 KB

The causal fungus of black choke disease in various C4 warm season grasses was collected from places mainly in Ishigaki Island, the most southern region of Japan. The fungus was found on 19 species of 14 genera of C4-grasses such as Brachiaria, Chloris, Chrysopogon, Cynodon, Digitaria, Echinochloa, Eragrostis, Eriochloa, Imperata, Leptochloa, Miscanthus, Panicum, Paspalum, and Pennisetum, including turfgrasses and forage crops. The fungus colonizes flowering heads and makes them mummified in appearance with the panicles attaching to each other. The color of the mature stromata ranges from grayish-white to black. Leaf surfaces of some grasses are colonized by the fungus, producing white streaks of hyphae. Many colorless, needle-shaped conidia of 10-25 × 0.5-1 μm are produced on infected tissues. The fungus was identified as Ephelis japonica based on the morphologies and molecular characteristics. Epiphytic features of E. japonica were examined using infected and uninfected Paspalum thunbergii clones from which the fungus was eradicated by treatment with a systemic fungicide. Hyphae colonized the surface of leaf primordia only in infected plants, a feature shared with some of the closely related Balansia spp. The potential for utilizing E. japonica to confer insect and disease resistance in turfs and forage crops was discussed.

刊行年月日
作成者 TSUKIBOSHI Takao TAKAHASHI Keiichi UEGAKI Ryuichi SUGAWARA Koya
著者キーワード

Balansia

C4-grass

epiphyte

公開者 Japan International Research Center for Agricultural Sciences
オンライン掲載日
国立情報学研究所メタデータ主題語彙集(資源タイプ) Journal Article
42
3
開始ページ 173
終了ページ 179
DOI 10.6090/jarq.42.173
権利 Japan International Research Center for Agricultural Sciences
言語 eng

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