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我县1979年开始大面积种植向日葵,由于不能合理轮作,菌核病日趋严重。1985年20个乡调查,平均减产30％,损失葵籽320多万公斤,严重影响农民收入。为此,1986—1988年对菌核病发生与防治进行了探讨。 一、发生规律 向日葵菌核病病原为Sclerotinia scle-rotiorum(Lib.)de Bary,病盘先出现菌丝斑,扩展后整盘腐烂。病株率可达100％。
Since 1979, a large area of sunflowers has been planted in our county. Due to the inability of reasonable rotation, sclerotinia is becoming more and more serious. In 20 townships in 1985, the survey cut the average output by 30% and the loss of 3.2 million kilograms of sunflower seeds seriously affected the incomes of peasants. Therefore, from 1986 to 1988, the occurrence and control of sclerotinia were discussed. First, the occurrence of the law Sunflower sclerotinone pathogen Sclerotinia scle-rotiorum (Lib.) De Bary, the disease first appeared mycelial plaque, after the expansion of the whole dish decay. Disease rate of up to 100%.