永寿县位于关中平原与渭北旱原分界处,属南温带亚湿润气候区,由于海拔较高(994.6米)年均温较低(10.9℃),年雨量偏少(571.4毫米),既有白菜型油菜,又栽培甘蓝型油菜,油菜病毒病的发生环境主要反映了北方冬油菜区中部和西部情况。 1980—1985年5年试验证明:当地旬均温在15.3℃——52.3℃范围内,播期愈早,发病愈重,播期与发病呈显著负相关关系;盛花期,角果期与苗期发病呈正相关关系;甘兰型 Yongshou County is located at the boundary of Guanzhong Plain and Weibei Aridity. It belongs to the southern temperate sub-humid climate zone. Because of the relatively high annual average temperature (9.94.6 m) and the relatively lower annual rainfall (10.9 ° C) and annual rainfall (571.4 mm) Cabbage-type rape, but also cultivate Brassica napus, rape virus disease environment mainly reflects the northern winter rapeseed area in the central and western situation. During the five years from 1980 to 1985, it was proved that the average daily temperature was in the range of 15.3 ℃ to 52.3 ℃, the sowing date was earlier, the morbidity was heavier, and the sowing date was significantly negatively correlated with the disease incidence. The incidence was positively correlated;