author(s)
Mounica D, Krishnayya PV, Srinivasa Rao M and AK Patibanda

abstract
The objective of this study was to examine the response of three successive generations of maize aphid, Rhopalosiphum maidis Fitch (Aphididae: Hemiptera), reared on maize Zea mays Linnaeus under elevated Carbon dioxide (eCO₂) (550 ppm ± 25 ppm) and ambient Carbon dioxide (aCO₂) (380 ppm ± 25 ppm) concentrations at six temperatures of 20, 25, 27, 30, 33 and 35 ±1^oC in open-top chambers and CO₂ growth chambers with CO₂ and temperature regulation. Experiment was conducted by adopting agar-leaf method. Elevated CO₂ and temperature significantly extended the duration of reproductive time (19.96-23.32 days) with highest fecundity (83.20-87.68 nymphs per female) whereas the development time (6.60-7.16 days) and total life cycle (26.96-29.92 days) were declined compared to that of aCO₂ and temperatures in R. maidis across the three generations. The findings showed that eCO₂ and temperature significantly increased the number of generations of R. maidis with reduced generation time influenced the crop-insect interactions. The results indicated that the target agricultural management practices for effectively mitigating the concentrations of CO₂ and temperature.