菌核病是一种流行病害,在生产向日葵地区发生普遍,为害严重。当前,随着向日葵生产的发展,加之它对土壤要求不严格,不少地区年年连种,有利于病菌积累,致使菌核病加重。据调查,一 Sclerotinia is a pandemic disease that is prevalent in the production of sunflower and is devastating. At present, with the development of sunflower production, coupled with its lack of strict soil requirements, many areas are planted year after year, which is conducive to the accumulation of germs, resulting in increased sclerotinia. According to the survey, one