Abstract: With the increase of human population,the inter-tidal mudflat and salt marshes of the eastern end of Chongming Island have been reclaimed as large as 8000 hectares during the last five years,which have resulted in waterbird species and population declining dramatically.This paper assessed the ecological,socioeconomic effects of the on-going wetland restoration project sponsored by the State Forestry Administration of China.The results indicated that within a restoration area of 133 hm²,the total values of wetland,in terms of ecological and socioeconomic value only,would increase from RMB 722 700 to 70 169 500 Yuan,which strongly proclaimed that the ecological engineering project would increase not only the ecological values,but also economic values.

Key words: Trichogramma confusum, T.pretiosum, Corcyra cephaloica, Interspecific competition