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.
tobacco brown spotsymptomoccurrence regularityinfluence factor
国家科技期刊平台
NSTL
维普
万方数据
