The effects of neem (Azadirachta indica A. Juss) and Milletia (Milletia ferruginea Hochst), Dimilin (Diflubenzuron) and Karate (?-Cyhalothrin EC) on Cotesia flavipes Cameron, a parasitoid of the stem-boring moth, Chilo partellus (Swinhoe), were evaluated. Botanicals were applied to the parasitized larvae as four application regimes (immediately, 4, 8 and 12 days after parasitism), which were chosen based on the parasitoid's life-cycle (parasitoid larval instar). The effects of the treatments on larval emergence, developmental period, adult progeny emergence, sex ratio and adult mortality were observed for C. flavipes while the effect on survival was observed for the host insect. Karate induced 100% mortality of the parasitized larvae within 3 days after treatment application, while neem and Milletia induced more than 50% mortality within 12 days. However, mortality due to Dimilin was not significantly different from the control. Mortality due to the parasitoid alone (control mortality) was very low and delayed, unlike the combined effect of insecticide treatment (botanicals or Dimilin) + the parasitoid. Among the treatments evaluated, the parasitoid emerged from Dimilin-, neem- and Milletia-treated larvae, but not from Karate-treated larvae. However, neem and Milletia delayed parasitoid emergence. Our results indicate that the two tested botanicals and an IGR are compatible with the parasitoid and can therefore be used in combination against C. partellus. Chilo partellus (Pyralidae) : Host Cotesia flavipes (Braconidae) : Parasite Life cycle and development; Parasites diseases and disorders; Parasites; Insect parasites; Hosts; Insect hosts; Ecology; Population dynamics; Abiotic factors; Chemical factors Chilo partellus; Hymenopteran parasites; Insecticides & growth regulator effect on parasitoid survival & development; Cotesia flavipes Cotesia flavipes; Development; Lepidopteran hosts; Chilo partellus; Survival; Fertilizers and pesticides; Effect on parasitoid survival & development in lepidopteran host; Insecticides & growth regulator none