Life Table Studies on Eupeodes corollae (Fabricius) (Diptera:Syrphidae), a Predator of the Cabbage Aphid, Brevicoryne brassicae (Linnaeus) (Homoptera:Aphididae)

Life table studies on Eupeodes corollae (Fabricius), an important syrphid predator of the cabbage aphid, Brevicoryne brassicae (Linnaeus) in the mid-hill region of Himachal Pradesh revealed that the net reproductive rate (Ro) of the species was 187.52 female eggs/female. The true intrinsic rate of natural increase (r_m) was 0.134. The population multiplied 1.14 times per day during the generation and was able to multiply 2.55 times every week. On reaching a stable age-distribution, the population comprised approximately 97 per cent of immature stages.