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Observations on the biology of Callosobruchus maculatus( Fab.) were carried out under ambient laboratory conditions. Pattern of oviposition, female adult longevity and F1 progeny emergence in Callosobruchus maculatus ( Fab. ) were observed. The results showed that over 60% of the total number of eggs was laid during the first 72 hours of the commencement of oviposition; however, oviposition rate and F1 adult emergence of the bruchids decreased with time thereafter. The maximum adult C. maculatus survival period was about ten days.
Keywords: Callosobruchus maculatus, pattern of oviposition, female adult longevity and F1 adult progeny emergence