Effect at some plant materials on progeny development in Callosobruchus maculatus F. in established infestations on cowpea grain at Sarnaru, Nigeria
SHIKAAN, T.O. and UVAH, I.I
ABSTRACT: In tests of efficacy of various plant materials for control of the bruchid, Callosobruchus maculatus Fabricus, on Cowpea at Samaru, it was found that groundnut and palm oils but not chilli pepper powder nor ash of pawpaw stem adequately protected previously uninfested cowpea from attack by the bruchid. The oils applied at 10 ml/kg seed controlled fresh bruchid infestations of up to three days old but five days or more. Adult progeny emergence was suppressed by 99.1 and 97.8% with groundnut oil by 99.6 and 98.6% with palm oil when applied at five and seven days after introducing the insects on grain, respectively. Cowpea seed germination was impaired over the control by 51.3 – 59.7% and 12.1-13.6%with groundnut and palm oils, respectively.