红苕根腐病是一种毁灭性病害,属局部地方发生。1986年营山县首次发现,是我省唯一发病点。病菌经省植检站和浙江农业大学鉴定是红苕根腐病菌。发病地块苕苗成片死亡,轻病地产量损失30％左右,一般损失50％左右,严重的损失70％以上,甚至无收。我们进行了发病规律和防治研究,现将结果简报于后: 一、发生规律红苕根腐病主要以土壤传染,发病地先形成一个或几个发病中心,以后逐年扩大,蔓延全田。病菌主要分布在土壤耕作层,随土层加深病 Red cress root rot is a devastating disease that occurs locally. The first discovery of Yingshan County in 1986 is the only point in our province. Germs by the provincial phytosanitary station and Zhejiang Agricultural University identification is the root rot of red yeast. The incidence of landfill seedlings into pieces died, slightly less than 30% of the loss of production, the general loss of about 50%, a serious loss of 70% or more, or no income. We conducted a study on the pathogenesis and prevention of disease. We will now present the results in brief. First, the law occurs. Red rot root rot is mainly caused by soil infection. The disease center first forms one or several disease centers and then expands and spreads throughout the year. Pathogenic bacteria are mainly distributed in soil tillage, with the deepening disease of soil