Leaf Spot of Broad Bean (Vicia faba) Caused by Alternaria tenuissima

Kwon, Jin Hyeuk; Park, Chang Seuk

Research in Plant Disease 2002;8(2):117-119.
Published online June 30, 2002.

Alternaria tenuissima에 의한 잠두 점무늬병

권진혁, 박창석

Leaf Spot of Broad Bean (Vicia faba) Caused by Alternaria tenuissima

Jin Hyeuk Kwon, Chang Seuk Park

Abstract

Leaf spot disease was found on broad bean (Vicia faba) in several farmer`s fields located in Changseon-myon, Namhae-gun, Gyeongnam province, Korea. The typical symptoms of the disease were appeared on leaves, stems and pods. The infection rates of the disease in the surveyed area were ranged from 8.4 to 46.8%. Colonies formed on PDA were developed aerial hyphae with grayish white, which later turned olive-green to black. Conidia were dark brown in color, long ellipsoid to elongated ovoid, obclavate and 23.7~61.3×7.2~16.8 mm in size. Septa were 4~10 transvers, 1~2 longitudinal or oblique. Conidiophores were solitary or fascicles and 18~113×3~6 mm in size. The optimum temperature for growth of the fungus was about 30℃. This is the first report on the leaf spot of broad bean caused by Alternaria tenuissima in Korea.

Key Words: Alternaria tenuissima, broad bean, Leaf spot, Vicia faba