某些因素对烤烟病毒病(PVY、CMV、TMV)发病程度的影响调查

摘要: 1996年在河南省宝丰县、襄城县和叶县,花叶病普遍较常年严重,故此对20种类型烤烟大田的病毒病(PVY、CM V、TMV)发病率和病情指数进行了调查。每种因素两种类型烟田的病毒病发病率差异和病情指数差异用新复全距法(SS R)进行检验。结果表明,麦烟套种、地膜覆盖、距公路较远种烟和轮作显著减轻病毒病;NC89烟田和砂质土烟田分别比G80、K326烟田和粘质土烟田病毒病显著减轻;幼苗剪叶、土施微肥(Zn、Cu、Fe、B)、移栽相对早晚和浇水相对早晚对烤烟病毒病发病程度无显著影响。

Abstract: The percentages and indexes of viruses(PVY、CMV、TMV)in different 20 types flue-cured tobacco fields were investigated in Henan province 1996.The difference of viruses percentages and indexes between tw o types of fields for each factor were tested by shortest significant rangs(SSR)method.The result showed that viruses(PVY、CMV、TMV)of flue-cured tobacco were significantly reduced by intercroping tobacco with wheat, covering plastic sheet in the field, growing tobacco far aw ay from highw ay and crop rotation;and viruses of NC89 and sandy soil tobacco were significantly less than G80, K326 and clay soil tobacco;and the effects of clipping seedlings, applying microelements (Zn、Cu、Fe、B)in soil, date of transplanting and date of irrigating were not significant.