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明确油菜不同生育期与病毒病发生的关系,对掌握关键防治时期有很大帮助。我們在1962年对不同生育期的油菜进行人工接种,誘发病毒病,测定其抗性。結果証明,小油菜(合肥小油菜)从子叶到現蕾期完全感病,子叶期发病率55.55—88.88％,四叶期发病率83.33—100％,現蕾期发病率100％,开花期可能是由于植株很快謝花结莢,而未发病。胜利油菜現蕾期发病率83.33—100％,比四叶期发病率33.33—100％重些,四叶期发病率又比子叶期发病率0—14.28％重,子叶期比較抗病。因此,胜利油菜主要在春后发病,而小油菜則是在苗期发病。苗期发病重的可使植株死亡,对产量影响大;而现蕾期发病一般的能够开花結
Clear rape different growth stages and the relationship between virus disease, to grasp the key control period of great help. In 1962 we rapeseed at different growth stages were inoculated to induce the virus disease and test its resistance. The results showed that the rape (Hevea brasiliensis) was completely susceptible from cotyledon to budding stage. The incidence of cotyledon was 55.55-88.88%, the incidence of four-leaf stage was 83.33-100%, the incidence of budding stage was 100% Thanks to plants quickly Xie pod, but not disease. The incidence of rape blossoming was 83.33-100%, which was 33.33-100% more than that of the four-leaf stage. The incidence of four-leaf stage was 0-14.28% higher than that of the cotyledon stage. Therefore, the victory rape mainly in the spring onset, while the small rape is in the seedling disease. Severe disease at seedling stage can plant death, the impact of large yield; budding period of the general flowering knot