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KMID : 0379119830110010061
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Korean Journal of Mycology
1983 Volume.11 No. 1 p.61 ~ p.61
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Sheath Rot Disease of Rice Seedling Caused by Gaeumannomyces graminis var. tritic
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Lee S.-C.
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Abstract
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Gaeumannomyces graminis var. tritici was first isolated from rice in 1981. Sheath rot of rice seedling in box culture for machine transplanting was produced by artificial inoculation of the causal organism. Especially sheath rot was developed from crown to leaf sheath above water level. Perithecia were usually formed in dead leaf sheaths and in culture. They were black, globose, and immersed with obliquely erumpent neck. Asci were unitunicate with an apical ring and contained g spores. Ascospores were hyline, slender, and 80∼104㎛ in length. Each spore showed 3∼4 septa. Based on mycological and cultural characteristics, the isolate from rice seeds was identified as Gaeumannomyces graminis (Sacc.) Arx & Olivier tritici J. walker.
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