Occurrence of Gray Mold on Astragalus sinicus L. Caused by Botrytis cinerea in Korea

Kwon, Jin Hyeuk; Lee, Heung Su; Oh, In Seok

Research in Plant Disease 2009;15(2):127-129.
Published online August 30, 2009.

Botrytis cinerea에 의한 자운영 잿빛곰팡이병의 발생

권진혁, 이흥수, 오인석

Occurrence of Gray Mold on Astragalus sinicus L. Caused by Botrytis cinerea in Korea

Jin Hyeuk Kwon, Heung Su Lee, In Seok Oh

Abstract

Gray mold caused by Botrytis cinerea occurred on Astragalus sinicus in an experimetal rice field of Gyeongsangnam- do Agricultural Research and Extension Services in Korea from 2008 to 2009. The symptoms appeared on the leaves, petiole and stems of infected plants. and then started with water-soaked, rotted and eventually died blight on plants. The colony were grayish brown and the optimum temperature for sclerotial formation was 20oC on potato dextrose agar. The conidia were one celled, mostly ellipsoid or ovoid in shape, and were colorless or pale brown in color. The conidia were 7~16×5~10 μm in size and conidiophores were 14~28 μm in length. On the basis of mycological characteristics and pathogenicity test on host plants, the fungus was identified as Botrytis cinerea Persoon: Fries.

Key Words: Astragalus sinicus, Botrytis cinerea, Gray mold