Occurrence of Bulb Rot of Allium victorialis var. platyphyllum Caused by Sclerotium rolfsii in Korea

Kwon, Jin Hyeuk; Jee, Hyeong Jin; Park, Chang Seuk

doi:2008.24.1.90

Plant Pathol J > Volume 24(1); 2008 > Article

The Plant Pathology Journal 2008;24(1):90-92.
DOI: https://doi.org/10.5423/PPJ.2008.24.1.090 Published online March 31, 2008.

Occurrence of Bulb Rot of Allium victorialis var. platyphyllum Caused by Sclerotium rolfsii in Korea

Jin Hyeuk Kwon, Hyeong Jin Jee, Chang Seuk Park

Abstract

In 2007, a bulb rot of Allium victorialis var. platyphyllum Makino caused by Sclerotium rolfsii occurred sporadically in a herb farm at Gyeongsangnam-do, Korea. The symptom initiated with water-soaking lesion and progressed into bulb rot and wilt of a whole plant. Severely infected plants were blighted and killed eventually. White mycelial mats appeared on the lesion at early stage and a number of sclerotia were formed on the bulb. The sclerotia were spherical, 1~3 mm and white to brown. The optimum temperature for the growth and sclerotia formation was 30℃ on PDA. The hyphal width was measured 4-9 μm. The typical clamp connections were observed on PDA. Based on the symptom, mycological characteristics and pathogenicity to the host plant, this fungus was identified as Sclerotium rolfsii Saccardo. This is the first report on the bulb rot of A. victorialis var. platyphyllum caused by S. rolfsii in Korea.

Key Words: Allium victorialis var. platyphyllum, bulb rot, Sclerotium rolfsii