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KMID : 0379119950230030257
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Korean Journal of Mycology
1995 Volume.23 No. 3 p.257 ~ p.265
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Identification and Pathogenicity of Rhizoctonia species Isolated from Turfgrasses
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김진원/Kim, Jin won
이두형/이재홍/최양윤/Lee, Du Hyung/Lee, Jae Hong/Choe, Yang Yun
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Abstract
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Morphological characteristics and pathogenicity of Rhizoctonia species causing blight diseases of turfgrasses were studied. The species were identified as Rhizoctonia cerealis Van der Hoeven, R. oryzae Ryker et Gooch, and R. solani Kuhn based on their morphological and cultural characteristics. Isolates of R solani were assigned to anastomosis groups (AG) with cultural type 1 (1A), 2-2 (IIIB), and 2-2 (IV). R cerealis, R. oryzae and R. solani induced sheath rot and foliar blight symptoms on creeping bentgrass (Agrostis palustris) and zoysiagrass (Zoysia japonica). Inoculation tests showed that disease severity with isolates of R. cerealis and R. oryzae were more serious to creeping bentgrass than zoysiagrass. AG 1 (IA) isolates of R .solani were strongly pathogenic on creeping bentgrass, but moderate to zoysiagrass. AG 2-2 (III) isolates were moderately pathogenic to zoysiagrass, but weakly to creeping bentgrass. AG 2-2 (IV) isolates from zoysiagrass were moderately pathogenic to zoysiagrass, but weakly to creeping bentgrass.
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