[Objectives]  To evaluate the effects of feeding on different Alternanthera philoxeroides ecotypes on the development and reproduction of Agasicles hygrophila. [Methods]  We compiled a TWO-Sex life table for A. hygrophila fed on different ecotypes of A. philoxeroides. [Results]  A. philoxeroides ecotype had no significant effect on the duration of the 2^nd and 3^rd larval instars, female longevity, male longevity or fecundity, of A. hygrophila. However, A. hygrophila that fed on the aquatic ecotype of A. philoxeroides had a shorter pupal developmental duration (6.28 d), higher larval survival (99.00%) and higher pre-adult survival (95.00%), than those fed on the terrestrial ecotype. Moreover, A. hygrophila that had fed on the terrestrial ecotype of A. philoxeroides had significantly lower intrinsic and finite rates of increase than those that had fed on the aquatic ecotype. Prey ecotype had no significant effect on either net growth rate (R₀) or mean generation time (T). [Conclusion]  A. hygrophila that fed on the aquatic ecotype of A. philoxeroides had faster pupal development, higher larval survival and higher pre-adult survival than those that fed on the terrestrial ecotype. The development and reproduction of A. hygrophila were not, however, significantly affected by feeding on the terrestrial ecotype of A. philoxeroides.