Abstract: 【Objective】To study the effects of resistant –insects transgenic rice on the key non-target pests in paddy fields. 【Method】The effects of three rice lines (MSA, MSB and MSA4) and three hybrid rice lines (21S/MSB, II-32A/MSB and KF6-304) of transgenic rice with a fused double genes of cry1Ac and sck (cry1Ac/sck rice) on the key non-target pests in paddy fields were investigated and the ecological safety of these cry1Ac/sck rice were evaluated in Sha County, Fujian Province in 2002 and in Xiangtan County, Huana Province in 2003, 2004, respectively.【Result】The significant differences in the fecundity of white back planthopper, Sogatella urcifera were not found between cry1Ac/sck rice MSA、MSB、21S/MSB、II-32A/MSB plots and their control, furthermore, both MSA4 and KF6-304 significant decreased the fecundity of S. urcifera during seedling. Whereas all six cry1Ac/sck rice lines sometimes increased or decreased the number of individuals of S. urcifera and brown planthopper, Nilaparvata lugens in the temporal dynamic, in most cases, there were no significant differences between cry1Ac/sck rice plots and their controls, and the situations in total quantity were similar. Both 21S/MSB and II-32A/MSB stimulated the populations of leafhoppers, however, there were no significant differences between other cry1Ac/sck rice plots and their controls and only a lower total quantity of leafhoppers in paddy fields. MSA and MSB showed high resistance to Pachydiplosis oryzae and decreased the number of shallot tracts and rate of rice clusters with shallot tracts at mid-stage of rice growth whereas these two cry1Ac/sck rice plots have the trends to increase the number of shallot tracts in null ramifications of rice before harvesing.【Result】 The results suggest that cry1Ac/sck rice lines, MSA, MSB, MSA4, 21S/MSB, II-32A/MSB and KF6-304 have not significant negative effects on key non-target pests in paddy fields.

Key words: non-target insect pests, Sogatella urcifera, Nilaparvata lugens, leafhopper, Pachydiplosis oryzae, transgenic rice