Abstract: The effect of(Spodoptera exigua multicapsid nucleopolyhedrovirus，SeMNPV) on Trichogramma confusumViggiani was studied by the methods of life table and PCR. The results showed that there was no significant difference in population parameters ofT. confemales between the treatment with the mixture of SeMNPVhoney and that with honey alone at 25±1℃. For the treatment with the mixture of SeMNPV and the treatment with honey alone at 25±1℃, the intrinsic rate of increase (r_m) of T. confusum females was 0.3524 and 0.3418, respectively; the finite rate of increase (λ) 1.42 and 1.41; the net reproduction rate (R₀) 124.34 and 142.57; the mean generation time 13.6 and 14.5 days; the population doubling time 1.96 nd 2.03 days The results of PCR detection of the offsprings of 5 females ofT. confusum which ingested the the mixture of SeMNPVhoney were all negative. It was therefore concluded that there was no distinct effect of SeMNPV on T. confusum adults, and T. confusum female adults infected with SeMNPV could not transmit SeMNPV to their offsprings.

Key words: Spodoptera exigua, nucleopolyhedrovirus, Trichogramma confusum, life table, population parameter, PCR 