Abstract: Reestablishment and maintenance of the egg parasitoid community on rice planthopper were monitored in Dasha Town and Dinghu District, Guangdong Province in 1996. During the first rice season, Anagrus nilaparvatae and A. paranilaparvatae appeared in IPM paddy in Dasha and in non-IPM paddy in Dinghu on the 9th and 13th day after transplantation of seedlings respectively. The reestablishment finished on the 21st day in both the two types of rice areas. The rate of reestablishment was 0.28 species and 0.21 species per day in IPM and non-IPM area respectively. During the second rice season, A. nilaparvatae and A. paranilaparvatae were found on the day of transplantation and the community reestablishment ended on the 21st day in both the rice areas. The rate of reestablishment was 0.12 specie and 0.04 species per day in IPM and non-IMP area respectively. During most of rice growing period, the parasitoid community was steadier in IPM area than in non-IPM area. The reestablishment and maintenance was influenced by temperature, species and number of the parasitoids in species pools, the distance from species pools, the insect pest species and the regimes of pest control.

Key words: rice planthopper, egg, parasitoid, community reestablishment