Abstract
cal vegetable belongs to the family Cucurbitaceae. Luffa gourds are grown primarily for their fibrous tissue skeleton, which is commonly used as scrubbers, cleaning pads or bath sponges, but green immature fruits were cooked as vegetable and eaten as squash or substituted for cucumber in salads (Oboh and Aluyor, 2009). Botrytis cinerea (teleomorph Botryo tinia fuckeliana) is an air borne, ubiquitous filamentous fungal pathogen and may cause gray mold on a variety of dicotyledonous plants, including many vegetables, fruits, ornamental flowers, and greenhouse plants (Elad, 1997; Jarvis, 1977). The pathogen is a necrotroph, inducing host cell death resulting in serious damage to plant tissues culminating in rot of the plant (Govrin and Levine, 2000; Staats et al., 2005). Botrytis infections are favored by a cool weather, rainy spring season and summer temperatures of approximately 15C (60F). Gray mold can be particularly damaging when rainy and/or damp weather occurs over several days. Since 2014, gray mold of sponge gourd caused by B. cinerea has been found at different locations in Korea. The aim of the present study was to identify the causal agent associated with gray mold observed on sponge gourd in Korea, based on culture characteristics, molecular phylogenetics, and pathogenicity.
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