1. Tabaci B biotype can carry the broad mite, Polyphagotarsonemus latus, with phoresy rate by 15.5 percent. This investigation gave some practice guide to their integrated management. 调查还证明B型烟粉虱可以携带侧多食跗线螨，携播率平均为15.5％，调查分析结果可为今后合理防治提供一定的实践指导。