大棚芹菜菌核病是近几年发生较重的一种病害，严重时甚至使芹菜绝收。病害常先在叶部发生，形成暗绿色病斑，潮湿时表面生白色菌丝层，后向下蔓延，引起叶柄及茎发病。病处初为褐色水渍状，后形成软腐或全株溃烂，表面生浓密的白霉，最后形成鼠类状菌核。病菌以菌核在土壤或混 Greenhouse celery sclerotinia is a serious disease in recent years, even in severe celery income. Diseases often occur in the leaves, the formation of dark green lesions, damp surface of white mycelium, spread down, causing petiole and stem disease. The beginning of the disease is brown water stains, after the formation of soft rot or whole plant ulceration, surface dense white mold, and finally the formation of murine sclerotia. Bacteria in the soil sclerotium or mixed