Abstract: 32 species of vector aphids were trapped by yellow and green utensils in tobacco cultivated region. 47% and 23% of which belonged to green peach aphid (Myzus ersicae (Sulzer)), cotton aphids (Aphis gossypii Glover), respectively. The amount of emigranting wing aphids and severity of tobacco virus diseases were different in different cultivated tobacco fields.The tobacco virus diseases were serious in pure tobacco fields and in the tobacco fields close to vegetable fields and weren't serious in interplanting fields of tobacco and wheat. The numbers of wing aphid in May had a significant effect on the outbreak of rivus diseases. The epidemic factors of viruses and countermeature were discussed.

Key words: Vector aphid, Tobacco virus diseases