The potential of crude extracts of Artemisia judaica L. were evaluated for toxic and repellent effect against adult females and immature stage of Tetranychus urticae Koch and its predator Phytoseiulus persimilis Athias-Henriot in the laboratory. Ethanolic leaf extraction was more effective as toxic and repellent effect against adult females and immature stage of T. urticae , followed by acetone, petroleum ether and aqueous extraction (P < 0.05). The results indicated that adults are more susceptible to the leaf extracts than immature. LC50 values of P. persimilis against ethanolic extract was very low (167.3 gm / ml) as compared to the LC50 values of both adult and immature of T. urticae which where 0.29 and 2.97 gm / ml, respectively.
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Hamdy Mahmoud El Sharabasy (2010) studied this question.
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