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花生根茎腐烂病,是由于色二孢属[Collarrot]和芽豆壳球孢[Macrophomimaphaseoij(Maubiam)Ashby]真菌从茎部侵入并扩展而形成的,是对花生危害极其严重的一种病害。幼苗及成株首先在近地表的根茎部位产生不规则病斑,后逐渐向纵横扩展,使茎部组织碎解和地上部凋萎枯死。这种病害在国内外均有发生。我省每年有两次发病高峰,第一次在6月下旬,第二次在8月上旬。常年发病率在3％左右,严重年份高达20—40％,减产三成以上。长期以来,在防治花生根茎腐烂病上多用选育抗病品种,合理轮作和加强肥水管理的方法,最近有些地方开展了药物防治。但是,我省花生产区种植面积大,水肥条件
Peanut rhizome rot disease is caused by invade and expansion of fungi from the stems of the genus Collarrot and Mabyi Ashby and is a disease that is extremely harmful to peanuts. Seedlings and adult plants first produce irregular spots in the rhizome near the surface, and then gradually expand in length and breadth, causing the stem tissue to disintegrate and the shoot to wither and die. This disease has occurred both at home and abroad. The province peak incidence twice a year, the first in late June, the second in early August. The annual incidence of about 3%, severe years up to 20-40%, cut more than three percent. For a long time, the prevention and control of peanut rhizome rot disease and more use of resistant varieties, rational rotation and to strengthen the management of fertilizer and water, recently carried out drug control in some places. However, flower planting areas in our province large area, water and fertilizer conditions