Research in Plant Disease 2002;8(1):55-58.
Published online March 30, 2002.
Choanephora cucurbitarum에 의한 부용 꽃썩음병
권진혁, 박창석
 
Flower Rot of Cotton Rose (Hibiscus mutabilis) Caused by Choanephora cucurbitarum
Jin Hyeuk Kwon, Chang Seuk Park
Abstract
In July 2001, rotting and shivering flowers of cotton rose (Hibiscus mutabilis) were found in the flower beds along the roadsides in Jinju area. The disease first started as water-soaking, dark-green lesions on the petals, and then whole flower was rotted rapidly. Whitish mycelia and monosporous sporangiophore with monosporous sporangiola were formed abundantly on the lesions. Colony apperared as white to pale yellowish brown mycelia on potato dextrose agar medium (PDA). Monosporous sporangiophore was long slender and branched at the apex, each branch bearing a head of sporangiospores. Sporangium was subglobose in shape and was 42.6~114.2 mm in size. Monosporous sporangiola were elliptic, fusiform or ovoid, and brown in color and 12.3~21.6×8.3~11.6 mm in size. Sporangiospores were elliptic, fusiform or ovoid in shape, dark brown or brown in color and 16.3~23.8×8.2~13.6 mm in size, and they had three or more appendages at bipolar end. Zygospores were mostly globose, dark black colored and sized was 42.6~78.4 mm in diameter. The fungus grew on PDA between at 15 to 40oC, and the optimum temperature was 30oC. This is the first report on the flower rot of cotton rose caused by C. cucurbitarum in Korea.
Key Words: Choanephora cucurbitarum, Cotton rose, Flower rot, Hibiscus mutabilis


ABOUT
BROWSE ARTICLES
EDITORIAL POLICY
FOR CONTRIBUTORS
Editorial Office
Rm,904 (New Bldg.) The Korean Science & Technology Center 22, Teheran-ro 7-gil, Gangnam-gu, Seoul 06130, Korea
Tel: +82-2-557-9360    Fax: +82-2-557-9361    E-mail: paper@kspp.org                

Copyright © 2024 by The Korean Society of Plant Pathology.

Developed in M2PI

Close layer
prev next