Pakistan Journal of Biological Sciences1028-88801812-5735Asian Network for Scientific Information10.3923/pjbs.2007.2505.2509Tribolium castaneum (Col: Tenebrionidae) and Sitophilus oryzae (Col: Curculionidae)]]>Yousefnezhad-IraniRoghayeh Ali AsgharPourmirza 1220071015Toxicity of spinosad on adults of Tribolium castaneum Herbst (Col: Tenebrionidae) and Sitophilus oryzae L. (Col: Curculionidae) at different temperatures and exposure intervals was evaluated. A commercial formulation of spinosad, Tracer® was used, against 7-14-day-old adults of rice weevil and red flour beetle. Bioassays were conducted at 24, 28 and 32°C and 65±5% RH. Mortality was recorded at 24, 48 and 72 h post-treatment. Spinosad was diluted with water for making appropriate dosages. A control group (distilled water) was included in each bioassay. A dose-dependent response was observed in both species. Similar trend was detected between mortality and time intervals. In both species an inverse relationship between LD50 values and temperature was detected. Based on LD50 values and none overlapping of 95% CL, S. oryzae was more susceptible to spinosad than T. castaneum.]]>Breslin, W.J., M.S. Marty, U. Vedula, A.B. Liberacki and B.L. Yano,20003811031112Cisneros, J., D. Goulson, L.C. Derwent, D.I. Penagos, O. Hernandez and T. Williams,200223156163Copping, L.G. and J.J. Menn,200256651676Daglish, G.J., M.K. Nayak and V.S. Byrne,2003pp: 78-81pp: 78-81DeVries, D.H. and G.P. Georghiou,1979724850Eger, J.E., J. Stavisky and J.E. Funderburk,1998Frakliniella sp. (Thysanoptera: Thripidae), with notes on a bioassay technique.]]>81547551Flinn, P.W., B. Subramanyam and F. Arthur,20049714651473Huang, F., B. Subramanyam and M.D. Toews,20049721542159Johnson, D.L.,199083366373Kadir, S., S. Bhadriraju, S. Ramaswamy, C. Reed and F. Arthur,20052005Koehler, P.G., W.H. Kern and J.L. Castner,20062006Kristensen, M. and J.B. Jespersen,2004Musca domestica (Diptera: Muscidae) field populations.]]>9710421048Lewis, P.A. and P. Neese,20052005Ludwing, S. and R. Oetting,2001Orius insidiosus (Hemiptera: Anthocoridae) when used for Frankliniella occidentalis (Thysanoptera: Thripidae) control on greenhouse pot Chrysanthamus.]]>84311313Musser, F.R. and A.M. Shelton,2005Ostrinia nubilalis (Lepidoptera: Crambidae).]]>61508510Ogg, B.,20062006Robertson, J.L. and H.K. Preisler, 1992pp: 121pp: 121SPSS Inc., 1993Subramanyam, B., M.D. Toews, T.J. Pitts, G.D. Thompson and M.B. Hertlein,20042004pp: 110Toews, M.D. and B. Subramanyam, 200359538544Thompson, G.D., R. Dutton and T.C. Sparks,200056696702