Influence of cultural practices on the population size of Myzus persicae (Sulzer) and Aphidius gifuensis (Ashmead) in the early growth season was investigated in 5 types of tobacco fields. Plastic film mulch and cropping pattern both exhibited significant influence on the population size of M. persicae in the early season. Tobacco field near peach orchard was infected with significantly higher aphid population (4 220 [plus or minus]747.9/100 plants) than the other four types of fields; namely, simple cropped & un-mulched (2116.0 [plus or minus] 880.7/100 plants), intercropped & un-mulched (880.0 [plus or minus] 244.0 /100 plants), simple cropped & mulched (696.0 [plus or minus] 328.8/100 plants), intercropped & mulched (408.0 [plus or minus] 198.3 /100 plants) fields. Film mulch also significantly affected the population size of A. gifuensis in the early season. Wasp population was higher in film-mulched fields (104.0 [plus or minus] 62.3/100 plants and 64. 0 [plus or minus] 38.5 /100 plants for simple cropping and intercropping, respectively) than in un-mulched fields (32.0 [plus or minus] 26. 8/100 plants and 32.0 [plus or minus] 17.9 /100 plants for simple cropping and intercropping, respectively). Therefore, film mulch is effective in both decreasing population of M. persicae and increasing population of A. gifuensis. Intercropping is also effective in checking population of M. persicae. none