2004/06/17 by Ahmad Pervez, Omkar Omkar · 2 citations
Agricultural and Biological Sciences · #Insect-Plant Interactions and Control #Insect and Pesticide Research #Plant and animal studies
paper · doi:10.1080/09583150410001682313
openalex publication_date 2004/06/17 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/29
Reproductive attributes, age-specific fecundity and natality based life-tables of an aphidophagous ladybird, Propylea dissecta (Mulsant) were investigated at five temperatures, using aphid, Aphis gossypii as prey. Pre-oviposition period decreased significantly with increase in temperature up to 27°C and thereafter increased at a slower rate. Egg viability dropped significantly at temperature extremes. Females lived longer than males; however, longevity decreased significantly with increase in temperature. The predicted total fecundity and oviposition rate were 952.54 eggs and 35.15 eggs per day at 27°C predicted by a mathematical model compared to empirical estimates of 856.00±30.00 eggs and 39.7±2.26 eggs per day. Age-specific fecundity was triangular and temperature dependent. The peak in oviposition rate occurred earlier at higher temperatures. The highest values of net reproductive rate (Ro=431.1), intrinsic rate of increase (rm=0.2134 day−1) and finite rate of increase (λ=1.2379 day−1) were recorded at 27°C, which suggests it is the optimum temperature for the mass rearing of P. dissecta.