Based on the results of related works (Manandhar, 2013), the corn – sunn hemp intercropping system was chosen to examine the effect on pest suppression through conservation biocontrol. In this system, pest suppression and plant damage reduction was achieved by enhanced parasitism of H. zea eggs by Trichogramma pretiosum Riley, stronger predator (Orius persequens and Orius tristicolor) activity, or by reduced incidence of Maize mosaic virus transmitted by corn planthopper, Peregrinus maidis Ashmead (Hemiptera: Delphacidae) (Manandhar, 2013). The parasitoid T. pretiosum reared from parasitized eggs of Lampides boeticus L. (Lepidoptera: Lycaenidae) on sunn hemp flowers and buds, was chosen for mass-rearing and inundative releases in corn monoculture crops to target H. zea eggs. In this paper, corn plots receiving the conservation biological control treatment are designated as ‘‘intercropped plots’’, the inundative biological control treatment with release of T. pretiosum in corn monoculture plots are designated as ‘‘released plots’’. For single degree of freedom contrast comparisons with corn monoculture plots (‘‘monoculture control’’), the plots with the two biological control treatments are collectively designated as ‘‘biocontrol-enhanced’’ plots.