author(s)
Ogbinaka EJA, Edema IO, Ehijie OH and Onakpoma SO

abstract
The effects of Neem extracts; Neem seed kernel extract (NSKE), Neem leaf extract (NLE), Neem stem bark extract (NSBE) at 0, 5, 10 and 15% concentrations were investigated on Ootheca mutabilis, Aspervia armigera, Clavigralla tomentosicollis and Coptosoma stali, all cowpea insect pests in Asaba area Delta State. The specific objective of the study was to evaluate the efficacy of selected neem extracts for insect pest management in cowpea production in the area. The treatments; NSKE, NLE, NSBE and untreated check were replicated three times using a randomized complete block design (RCBD). The results obtained indicated that neem extract had some insecticidal properties which showed positive control on some major insect pests and significantly influenced pest population associated with the crop. The study showed that 10% NSBE concentration was more effective for the management of Ootheca mutabilis, Aspervia armigera and Clavigralla tomentosicollis amongst the various levels of neem extracts tested in two years cropping seasons (2021 and 2022). Based on the findings from the study, 10% concentration of NSBE is recommended to farmers for mitigating insect pest damage on cowpea in the study area.