Effect of Different Prey Mites on the Biological Aspects and Life Table Parameters of the Cunaxid Mite, Cunaxa setirostris (Hermann) (Cunaxidae)

Document Type : Original research articles

Authors

1 Faculty of Technology & Development, Zagazig University, Egypt

2 Plant Protection Research Institute, A.R.C, Dokki, Egypt

Abstract

The effect of different preys on the biology, consumption rate and life table parameters of the predator, Cunaxa setirostris (Hermann) was investigated at 22±2°C and 75±5% R.H. C. setirostris was able to feed and complete its development on the three mite species Tetranychus urticae Kock, Tydeus californicus (Banks) and Eutetranychus africanus (Tucker). Predator female recorded the longest and the shortest life cycle, with larva and three nymphal stages within 31.5 and 23.9 days, when fed on E. africanus and T. californicus, respectively. The generation period ranged from 26.6 to 34.7 days when fed on T. californicus and E. orientalis, respectively. Its fecundity averaged of 52 and 18 eggs when fed on T. urticae and E. orientalis, respectively. The mean generation time (T) was (42.62, 38.62 and 48.54); the doubling time (DT) was (7.49, 7.42 and 4.31); the intrinsic rate of natural increase (rm) and finite rate of increase (λ) were (0.09, 0.093 and 0.16) and (1.07, 1.08 and 1.04), respectively; while the net reproductive rate (Ro) was (24.35, 17.55 and 8.1); and gross reproductive rate (GRR) was (27.58, 22.01and 24.5) for C. siterostris fed on T. urticae, T. californicus and E. orientalis, respectively.

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