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http://dx.doi.org/10.5423/RPD.2008.14.2.127

Occurrence of Rhizopus Soft Rot on Rubus crataegifolius Caused by Rhizopus stolonifer in Korea  

Kwon, Jin-Hyeuk (Gyeongsangnam-do Agricultural Research and Extension Services)
Chi, Tran Thi Phuong (Plant Protection Subdepartment of Dongnai)
Publication Information
Research in Plant Disease / v.14, no.2, 2008 , pp. 127-130 More about this Journal
Abstract
Rhizopus soft rot caused by Rhizopus stolonifer on June, 2008 occurred on Rubus crataegifolius Bunge in the box at Jinju City Wholesale Market of Agricultural Products at Gyeongnam province in Korea. The infected fruits were rapidly water-soaked, softened, black and eventually rotted. The symptoms occurred after infecting wounds at harvest time. The colony were white to light brown, formed much sporangiospores. The optimum temperature of the fungus on potato dextrose agar was $30^{\circ}C$. Sporangiophores were $12{\sim}25{\mu}m$ in width. Sporangia were globose or hemispheric, white at first and gradually to black, and $82{\sim}195{\mu}m$ in size. Columella were hemispheric, and $70{\sim}92{\mu}m$ in size. Sporangiospores were irregular round or oval, brownishblack and $9{\sim}21{\times}7{\sim}8{\mu}m$ in size. On the basis of symptom, mycological characteristics and pathogenicity of the fungus, the causal fungus was identified as Rhizopus stolonifer. This is the first report of Rhizopus soft rot by R. stolonifer on R. crataegifolius in Korea.
Keywords
Rhizopus soft rot; Rhizopus stolonifer; Rubus crataegifolius;
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