Abstract: This paper summarizes the effects of main atmospheric pollutants,such as O₃,SO₂,fluorides,acid rain etc.on plant pathogenic microorganisms；the effects of air pollution on the occurance and infestation of phytophagus insects,and the influences of greenhouse effect of CO₂ on the outbreak of pests.

Key words: greenhouse tomato, protected vegetable, transpiration, affecting factor, multiple linear regression.