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东阳县在1955年以前,耕作制度以老三熟(春花—早中稻—秋玉米)和麦稻两熟制为主,黑尾叶蝉发生数量不多;推广连作稻以后,黑尾叶蝉数量就逐渐增多;1965年后,黑尾叶蝉明显上升以至暴发,并传播水稻普通矮缩病、黄矮病和黄萎病,成为水稻增产的一个严重障碍。1965年以来,本站曾对黑尾叶蝉和矮缩病的发生规律作过一些调查观察,现将资料整理如下,供参考。
Before 1955 in Dongyang County, the farming system was dominated by the second generation (Chunhua-Early Middle-Autumn-Autumn Corn) and the second generation of the mature rice. The number of the black-tailed leafhopper was small. After promoting the continuous cropping rice, It gradually increased; after 1965, the black-leafhopper significantly increased and even outbreaks, and spread of common rice dwarf, yellow dwarf and verticillium wilt, become a serious obstacle to increase rice production. Since 1965, this site had on the occurrence of black-tailed leafhopper and dwarf disease made some observations, the data are summarized below, for reference.