Toxicity of Some Pesticides and Plant Extracts on Tetranychus urticae and its Predator, Phytoseiulus persimilis

Background and Objective: Pesticides induced direct and indirect effects on natural enemies so that, this study was aimed to evaluate six pesticides and two plant extracts to choice less toxic one for natural enemy and more toxic for mite.Materials and Methods: The toxicity of tested pesticides and plant extracts on Tetranychus urticae and predacious mite, Phytoseiulus persimilis evaluated using leaf dipping and spraying methods in laboratory and the number of dead adults recorded after 1-7 days of treatment.Results: The spraying method was more effective than leaf dipping one.Abamectin 1%+Thiamethoxam 9% were very toxic on T. urticae and was less toxic for P. persimilis.Moreover, khaya and pomegranate extracts were more toxic for T. urticae and were very safer for P. persimilis after treated with leaf dipping method.As for spraying method, Fenpyroximate was very toxic to T. urticate, where it was safer for P. persimilis.Conclusion: From this study it was concluded that Abamectin 1%+Thiamethoxam 9%, Fenpyroximate, khaya and pomegranate extracts were toxic to T. urticae and safer for P. persimilis.