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为了明确杂交水稻和常规品种在病虫害发生方面的差异,从中探索发生规律,我们在晚季栽培中,作了一些初步调查,现简述如下:1.螟虫:据在石年公社山马大队第七队晚稻品比田调查,在统一用药防治第三代螟虫的情况下,常规品种(早金凤、晚粳228—9、加湖4号)无枯心苗,杂交水稻6号系统(汕优6号、早优6号、七优6号、四优6号、萎优6号、南优6号)螟害率平均0.46%,珍汕97×IR28螟害率0.21%,珍汕97×6185螟害率0.47%;从石年、田洋公社大田调查结果看,常规品种
In order to clarify the differences between hybrid rice and conventional varieties in the occurrence of pests and diseases, to explore the occurrence of law, we conducted some preliminary investigations in the cultivation of late season, are summarized as follows: 1 stem borer: Seven teams of late rice than the field investigation, in the unified control of the third generation of stem borer case, the conventional varieties (early Jinfeng, late Japonica 228-9, Lake No. 4) no dead heart seedlings, hybrid rice 6 system Excellent 6, Zaoyou 6, Qiyou 6, Siyou 6, Weiyou 6, Nanyou 6) were 0.46% on average, 0.21% on Zhenshan 97 × IR28, Zhenshan 97 × 6185 stem borer rate of 0.47%; from the stone, Tian Yang commune field survey results, conventional varieties