Effect of parental ageing on offspring developmental and survival attributes in an aphidophagous ladybird, Cheilomenes sexmaculata


Omkar (corresponding author), Ladybird Research Laboratory, Department of Zoology, University of Lucknow, Lucknow-226007, India. E-mail: omkaar55@hotmail.com


The present study is the first attempt to investigate the effect of parental ageing of Cheilomenes sexmaculata (Fabricius) on total developmental period, developmental rate, adult weight on emergence, longevity, egg to adult survival and age-specific survivorship of the offspring. Young parents (10–20 day old) produced offspring with the shortest total developmental period, highest development rate, highest weight on emergence, greater longevity and highest survival. Age-specific survivorship of the offspring of younger parents declined later than the offspring of middle (30–40 day old) and old (50–60 day old) aged parents. This study would help in understanding the effect of parental ageing on future generations of predaceous ladybird beetles and would be helpful in designing mass multiplication programme of the bioagent, C. sexmaculata, in the laboratory.