油菜菌核病是油菜主要病害之一,历年来的调查结果表明,田间发病率一般为15—30％,千粒重下降20％左右,产量损失达25％;严重年份,产量损失高达50％以上。为了搞好此病的测报与防治,笔者对菌核萌发、子囊盘的形成与存活期等和气候条件的关系作了一些观察,现将结果整理于下,以供参考。 Sclerotinia sclerotiorum is one of the major diseases of rapeseed. The investigation results over the years show that the incidence in the field is generally 15-30%, the 1000-grain weight is reduced by about 20% and the yield loss is up to 25%. In severe years, the yield loss is as high as 50% or more. In order to do a good job of measuring and controlling the disease, the author made some observations on the relationship between the germination of sclerotia, the formation and survival of the ascus plate and the climatic conditions, and the results are summarized below for reference.