Effect of four aphid species on certain biological characteristics and life table parameters of Chrysoperla carnea Stephen and Chrysopa septempunctata Wesmael (Neuroptera: Chrysopidae) under laboratory conditions
2000
El-Serafi, H.A.K. | Abdel-Salam, A.H. | Abdel-Baky, N.F. (Mansoura Univ. (Egypt). Dept. of Economic Entomology)
Effects of prey kinds on developmental times, mortality percent, consumption rate, longevity, fecundity, and life table parameters were studied in the common lacewings, Chrysoperla canea and Chrysopa septempunctata using the following aphids, Aphis gossypii, Sitobion avenae, Rhopalosiphum maidis, and Aphis nerii under laboratory conditions. The data revealed that the total developmental time from egg hatching to adult eclosion of the two chrysopids was differed significantly when reared on the four aphid species tested. Mortality percent of Ch. canea from egg hatching to adult emergence ranged from 6.5 per cent when fed on A. gossypii to 19.5 per cent on A. nerii, while in Ch. septempunctata, it varied from 7.0 per cent on S. avenae to 26.5 per cent on A. nerii. Larval stage of the two chrysopid tested were preferred A. gossypii, followed by S. avenaa, R. maidis and A. nerii. The average number of aphid consumed per larva per day was also significantly differed. Considering the consumption rate of Ch. septempunctata adults, the females were consumed more than males and the highest consumption rate was obtained when reared on A. gossypii. Adult longevity, and fecundity of females of the two chrysopid species were affected by the prey kinds. The longest (7) and (D7) of predators was achieved by rearing on A. nerii. Whereas, the highest values of Ro, rm, and erm were obtained when these predators were fed on S. avenae. Survivorship rate (Lx) and maximum oviposition rate per female per day (Mx) of Ch. carnea were high by rearing
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