贵州省烟田蚜虫的种类和田间定殖情况

研究了贵州省烟田蚜虫的种类,结果表明:迁入到烟田的蚜虫隶属9种,其中桃蚜(Myzus persicae)、甘蓝蚜(Brevicoryne brassicae)、豆蚜(Aphis craccivora)、萝卜蚜(Lipaphis erysimi)、麦长管蚜(Macrosiphum miscanthi)占诱集蚜量的90%以上,尤以桃蚜数量最大,是烟田传播病毒病的主要蚜种,能传播多种烟草病毒病。试验结果还表明,单作烟田和毗邻油菜的烟田病毒病发病较高,麦套烟的发病较轻;甘蓝蚜、豆蚜和萝卜蚜基本上不能在烟叶上定殖。

Categories and establishment of aphids in tobacco fields in Guizhou

The categories of aphids in tobacco fields in Guizhou were studied.Thirty-two species of vector aphids were trapped,including Myzus persicae,Brevicoryne brassicae,Aphis craccivora,Lipaphis erysimi and Macrosiphum miscanthi,which accounted for 90% of the total.The quantity of Myzus persicae was the largest,and it was also the most important aphid vectoring virus diseases in the tobacco fields,which spread several kinds of virus diseases.The results also showed that the severity of tobacco virus diseases was different in different tobacco fields.The tobacco virus diseases were serious in pure tobacco fields and in the tobacco fields close to vegetable fields,but not serious in inter-planting fields with tobacco and wheat.At the same time,the experiments also indicated that establishment of B.brassiae,A.craccivora and L.erysimi in tobacco fields was impossible.