Studies on the relative importance of the three known species of cabbagernaphids (8revicory/le brass;cae (Unneaus), Myzus persicae (Sulz) and Upaphisrnarysim/ (KaltenbachÂ» and their parasitoid complex in Kenya were carried out.rnThe studies involved farmers' rlelds' surveys and intet"llews and also fieldrnexperiments conducted at the Jorno Kenyatta University of AgricultLKe andrntechnology (JKUAT) Research and Producti041 Department land and in arnfarmer's field at Umuru. Gloria Fl hybrid was sown at JKUAT whilernCopenhagen Market variety was sown at Umuru.rnThe field experiments W&fe conducted In a Completely Randomized BlockrnDesign (CRBD) involving three treatmants and a control, with three replicatesrneach. The trealments comprised of applications of: - lambda-Cyhalothrinrn(Karate; Bacillus /huringiensis Berliner (8t.) var. Kurstaki toxin (Dipel 2x) thatrnselectively kills Diamondback moth (DBM); A combination or the two pesticidesrn(Karate and Bt.) and UnlIeated controls. Parameters included; relativernablXldance of the three species of aphids; their corresponding damage torncabbage; the number of mummies per sample; pereent parasitism and thernproportions of the primary- and hyper-parasitoids hatched. The parasiloidrncomplex was constructed from the identified paras ito ids.rnThe results showed aphid counts to be higher in !'1M karate-treated plots thanrnin the karata-treated ones. More hyperparesitoids notably Alloxys/a sp andrnPachyneuron sp. than the only primary parasiloid (Diaeraliella rapaa) emergedrnfrom non karale-treated plots. This might suggest that karate might have thernadvantage of repelling hyperparasitolds or inhibiting their emergence. Yieldrnshowed some negative correlation with ephid infestations. A combinedrntreatment gave the best ov9(all yield at both sites .