Abstract: This paper studies the photosynthtic and respiratory characteristics of Amblystegium serpens, which lives in fountain.The optimum water temperature is 15℃ and the optimum light intensity is 250～400μmol·m^-2 ·s^-1,needed for A. serpens photosynthesis.The photosynthtic rate is the highest at 300μmol·m^-2 ·s^-1 .The light compensation point increased with water temperature,with 10,50,54 and 59μmol·m^-2 ·s^-1 at 10,15,20 and 25℃ respectively.Respiratory rate of A. serpens has a positive relationship with water temperature.

Key words: Bemisia tabaci, Eretmocerus sp, Aschersonia aleyrodis, Effectiveness