The insecticidal activity of two plant insecticidal components and the effects on grasping rate,aggregation rate,climbing rate and walking rate of micrergates of Solenopsis invicta workers were studied by aqueous solution tube method with rotenone and veratrine.The results showed that after being treated with rotenone solution of 0.04,0.07,0.35,0.70 and 0. 88 mg/L for 11 d,the mortalities of red fire ants were 55.00%,70.00%,80.00%,95.00% and 100.00% respectively,and that of control was 30.00%.The grasping rates of ants were 40.00%,30.00%,20.00%,5.00% and 0 respectively,and that of control was 70.00%.The aggregation rates were 25.00%,25.00%,15.00%,0 and 0 respectively,and that of control was 65.00%.The climbing rates were 45.00%,30.00%,20.00%,5.00% and 0 respectively,and that of control was 68.33%.The walking rates were 40.00%,30.00%,15.00%,5.00% and 0 respectively,and that of control was 60. 00%,respectively.With the veratrine solution of 0. 005,0. 010,0. 050,0. 100 and 0. 500 mg/L treating for 11 d,the mortalities of micrergates were 40.00%,46.67%,55.00%,63.33% and 93.33% respectively,and that of control was 30.00%.The grasping rates of ants were 60.00%,53.33%,45.00%,36.67% and 6.67% respectively,and that of control was 70.00%.The aggregation rates were 50.00%,40.00%,30.00%,20.00% and 0 respectively,and that of control was 65.00%.The climbing rates were 58.33%,50.00%,41.67%,30.00% and 5.00% respectively,and that of control was 68.33%.The walking rates were 58.33%,50.00%,41.67%,33.33% and 5.00% respectively,and that of control was 60.00%,respectively.The effects of rotenone and veratrine on red fire ants were more significant with time.At lower doses,the two insecticidal ingredients have certain insecticidal activity and behavioral inhibition effects on the micrergates,and have good application prospects in the control.