The impact of companion planting on the parasitism rateof the small white butterfly Pieris rapae (Lepidoptera: Pieridae)

Abstract: This study investigated the effect of using companion plants on the occurrence of amajor pest in cabbage cultivation, Pieris rapae and its parasitism rate. Companion plants did nothave a significant effect on the occurrence of P. rapae over the study period of two years,although they were significantly lower in one year when grown in association with Anethumgraveolens. Parasitism rate of P. rapae was highest on cabbages grown together with this plantwhen the two year average was considered.