陕西渭北烟区黄瓜花叶病毒流行学的初步研究

A Primary Epidemiological Study of Cucumber MosaicVirus on Tobacco in Weibei Shaanxi

１９９５～１９９６年调查表明，越冬油菜是陕西省渭北烟区黄瓜花叶病毒（ＣＭＶ）的主要初侵染源；ＣＭＶ的主要介体桃蚜以若蚜或卵越冬，从而造成烟田有翅蚜迁入有两个明显的高峰，其中第一次迁入高峰蚜量和ＣＭＶ的发生呈正相关。据５年资料相关分析表明，第一次迁入烟田高峰蚜量，２～４月降水量和４月平均温度与６月中旬烟田ＣＭＶ病株率呈显著相关。综合分析结果显示，通过预测烟田第一次有翅蚜迁入数量，就可以预测当年ＣＭＶ的发生情况。

Some epidemiological factors of CMV were studied in Weibei,Shaanxi from 1995 to 1996.The results showed that the overwintered rape was the most important primary inoculum source of CMV in this tobacco planting area.Myzus persicae overwinters by the manners of nymphae or eggs had two immigration peaks into tobacco fields.Based on 5 years investigation data,the regression analysis results indicated that the percent of tabacco plants with CMV symptom was highly correlated with the aphid mount per 100 plants in the first immigration period,with the precipitation from February to April and with the average temperature in April.Through comprehensive analysis,it is suggested that CMV disease could be predicted by the first immigrating myzus persicea amount.