Effects of three soybean cultivars on biological and reproduction parameters of Orius albidipennis Rueter (Hem., Anthocoridae) as predatory bug of two spotted mite Tetranychus urticae Koch (Acari: Tetranychidae) under laboratory conditions

In this study the biological parameters (life table, reproduction, population growth rate) of the predatory bug Orius albidipennis Rueter (Hem., Anthocoridae) were studied on Tetranychus urticae Koch reared on three cultivars of soybean. The experiments conducts in laboratory conditions at 25 ± 1oC, % 65 ± 5 relative humidity and a photoperiod of 16:8 hours (L:D). There were no significant differences between mean incubation period and mean preimaginal developmental times on three cultivars of soybean. On three soybean cultivars, the females develpopmental time were higher than males. Net reproducation rate (R0), the intrinsic rate of increase (Rm), finite rate of increase (λ), mean generation time (T) and dubling time (DT) for O. albidipennis calculated were on Gorgan3, 7.14, 0.08, 1.09, 22.44 and 7.89 respectively and on DPX 9.68, 0.09, 1.10, 22.87 and 6.96 respectively and on Williams 3.65, 0.05, 1.05, 22.30 and 11.88 respectively.