تلخیص
Biological and demographic parameters of cabbage aphid, Brevicoryne brassicae (L.) were studied on
four different Brassica hosts; Cabbage, Broccoli, China cabbage, and Knol khol under laboratory
conditions. Age-stage, two-sex life table studies showed significantly higher intrinsic rate of increase
(rm) and finite rate of increase (λ) on China cabbage followed by Broccoli and Cabbage. Performance
of cabbage aphids remained comparatively low on Knol khol in terms of intrinsic rate of increase (rm),
finite rate of increase (λ) and net reproductive rate. Total duration of immature stages was
significantly longer on Knol khol than Cabbage and China cabbage, however, adult pre-reproductive
period showed non-significant variation. Reproductive period, adult longevity and female fecundity
upon all the studied plant species were significantly different. The minimum fecundity and adult
longevity were observed on Knol khol. The probability of surviving nymph to adult female was 0.25,
0.35, 0.50 and 0.60 on Cabbage, Knol khol, Broccoli and China cabbage, respectively. The gross
reproductive rate, life expectancy and age stage reproductive values were also minimal on Knol khol.
On the basis of present life table studies, China cabbage remained the most susceptible host followed
by both Broccoli and Cabbage while Knol khol proved to be the most unsuitable host. Present studies
confirm Knol khol as comparatively more resistant against cabbage aphid and suitable to be cultivated
as important vegetable crop in Pothwar region of Punjab.
Muhammad Asif Aziz, Muhammad Irfan, Imran Bodlah, Muhammad Hanif. (2016) EFFECT OF DIFFERENT BRASSICA VEGETABLES ON BIOLOGY AND DEMOGRAPHIC PARAMETERS OF BREVICORYNE BRASSICAE (HOMOPTERA: APHIDIDAE) UNDER LABORATORY CONDITIONS, Asian Journal of Agriculture and Biology, Volume 4, Issue 1.
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