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我省杂交晚稻种植面积连年扩大,其病虫为害与常规晚稻田相比,发生了一些新的变化。据省内外反映,杂交晚稻田的白叶枯病、病毒病、二化螟等病虫害的发生为害较之常规晚稻田重。为摸清病毒病的发生规律,给大田生产提供防治依据,我们于1977—1978年在肖山县迳游公社下俞大队及金华、东阳县一些场队进行了试验和调查。现将两年来的试验和调查结果整理如下:一、发病规律杂交晚稻病毒病的发生较之常规晚稻早而重,但其主要感染期与常规晚稻是一致的,都在本田初期。
Compared with conventional late paddy fields, some new changes have taken place in the planting area of hybrid late rice in our province. According to reports both inside and outside the province, the occurrence of pests such as bacterial blight, viral disease and striped stem borer in hybrid late rice fields was more serious than that in conventional late rice fields. In order to find out the regularity of occurrence of virus disease and provide basis for prevention and control of field production, we carried out experiments and investigations in 1977 and 1978 in Yu Dailu, Jinyu and Dongyang counties under Yuyou Commune in Xiaoshan County. Now two years of testing and survey results are summarized as follows: First, the incidence of hybrid Late hybrid rice disease occurred earlier and heavier than conventional late rice, but its main infection period is consistent with conventional late rice are in the Honda early.