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食根金花虫(Donacia lenzi Schonf.)俗称地蛆,历年来在高邮县马棚、界首、周山、临泽、官垛等公社的一熟沤水田为害比较严重,尤以中稻被害最烈,一般被害率为30—40％,严重的达70％以上,甚至回耖重种。其发生特点是:一般的稻棵成摊枯死,严重的连片枯死;发生密度最高的每棵稻根有虫63头,一般约有20头左右,根须全部被吃光,叶子卷曲枯萎,严重地影响产量。 此虫一年发生一代,以幼虫隐藏地下越冬,深入土中7—8寸。翌年6、7月即从杂草根部转移至稻苗根
Commonly known as maggots, Donacia lenzi Schonf. Has suffered serious damage in the first-crop paddy fields in the communes of Mapeng, Jieshou, Zhoushan, Linze and Gaodu in Gaoyou County in recent years, The general damage rate of 30-40%, severe up to 70% or more, and even back to heavy species. Its occurrence is characterized by: common rice plants into a dead, serious contiguous withered; the highest density of each rice root 63 insects, usually about 20 or so, root beard are all eaten, leaves curly wither, Seriously affect the yield. A generation of this pest occurs a year, larvae hidden underground winter, deep soil 7-8 inches. In June and July of the following year, the roots of weeds were transferred to the root of rice seedlings