Temperature-dependent Fecundity and Life Table Parameters of Aphis gossypii Glover (Homoptera: Aphididae) on Cucumber Plants

Temperature-fecundity of the melon aphid, Aphis gossypii Glover, was studied at constant temperatures ranging from 15 to under RH and a photoperiod of 16 : 8 (L : D) A life table parameters were constructed using the results. The longevity of A. gossypii gradually increased with decreasing temperature below . Also fecundity increased with decreasing temperature and the highest fecundity was 61.8 nymphs per female at . However. daily fecundity increased with increasing temperatures up to showing 5.9 nymphs per day and thereafter decreased. Longevity and fecundity of the adult in the greenhouse with an average temperature of and RH, were 20.0 days and 59.6, respectively, which were longer and higher than those in the growth chamber with similar conditions. net reproductive rate (Ro) was 54.9 at while intrinsic rate of increase () and finite rate of increase () were the highest 0.5 and 1.6 at , respectively. doubling time (DT) and mean generation time (T) were the shortest 1.4 and 6.8 at indicating that optimal temperature for the development is .