贵州省兴义市烟草赤星病发生情况调查

为了弄清烟草赤星病在兴义烟区的发生情况,以便于更准确预防此病,于2011年选择不同烟草品种、海拔高度、连轮作条件的烟草种植区对烟草赤星病发生情况进行了调查。结果表明,不同烟草品种间病害的发生情况不同,南江三号的抗病性远强于云烟87和云烟85,云烟85的抗病性最差;不同海拔高度田块的病害发生情况差异较大,病害流行严重程度表现为:山脚>山腰>山顶;不同连轮作地块病害的发生情况同样存在很大的差异,隔年轮作地烟草赤星病发病情况最轻,连作地发病较重,且连作年限越长,发病越重。烟草赤星病在兴义普遍发生,且烟草品种、海拔高度、连轮作条件对该病的发生与流行影响较大。

Investigation on Occurrence of Tobacco Brown Spot in Xingyi of Guizhou Province

In order to make clear the occurrence of tobacco brown spot for better prevention and control of the disease in Xingyi,this study investigated the disease occurrence in the field with different varieties,altitudes and rotation conditions in 2011.The results showed that the disease occurrence differed with the varieties,altitudes and rotation conditions different.Nanjiang No.3 had the strongest disease resistance,followed by Yunyan 87,and Yunyan 85 was the weakest.At different altitudes,the disease severity showed as the foot>hillside>hilltop.The disease incidence was the least serious in the rotation field,but it was serious in the continuous-cropping field,the longer the continuous-cropping period,the heavier the disease incidence.Tobacco brown spot was widespread in Xingyi,and varieties,altitudes and rotation conditions seriously influenced the occurrence and epidemic of the disease.