الكفاءة التكاثرية لحشرة مَنّ الباقلاء الأسود Aphis fabae Scopoli (Homoptera: Aphididae)

Abstract

The details of the biological performance of this species was obtained by measuring certain parameters including: fecundity, Intrinsic rate of increase, survival rate, the biological strategies of laying nymphs during reproductive period. Fecundity and other reproductive parameters were determined mainly for the two types of adult females which were: randomly selected females from natural population ( type 1 female) and females reared from newly laid nymphs (type 2 female) for this species of aphids. The reproductive rates (R0) of A. fabae were the highest on V. fabae and M. indica when females were reared from newly laid nymphs which were 49.5 and 46.5 nymph/female respectively. The highest longevity values of the adults which were 14.05 and 14.75 days were obtained for the females reared from newly laid nymphs on M. indica and V. faba hosts, respectively. The longevity of the adult reached to 10.27, 12.1, 8.05, 4.43, 0 for adult 1 and 14.05, 14.75, 12,2, 0, 0 for adult 2 on V. faba, M. indica, M. sativa, B. volgaris, Brassica oleracea respectively, and laying nymph period of the female reached to 10.27, 12.1, 8.05, 4.43, 0 for adult1 and 14.05, 14.75, 12,2, 0, 0 for adult2 on V. faba, M. indica, M. sativa, B. volgaris, B. oleracea respectively. Females of the black bean aphids showed the highest intrinsic rate (rm) of population increase (0,55) on their primary host by females randomly selected from natural population, the highest number of nymph/day/female (3.92 and 3.02) occurred when the females of the black bean aphid were reared on the primary host, V. faba and M. sativa respectively.