Chemical treatment for control ofM. persicaeon pepper showed that soil application for the granular insecticide carbofuran reduced the aphid population below that of the check plots without affecting the prevailing predators. However, pirimicarb also gave good results, in controllingM. persicaeinfestation on sweet pepper. Cypermethrin gave unsatisfactory results and a further outbreak of aphids 3 weeks after the second application was observed. Residues of the used insecticides in fruits and leaves of pepper plants sampled 25 days after the last applications were found to be much lower than the permitted tolerance level. Several species of predators and parasites were collected and observed.