The potential of extract of Artemisia Judaica L. against the predator  Euseius scutalis (Athias-Henriot) and two kinds of prey that fed on them, first-instar nymphs of whitefly and second instar larvae of onion thrips, The results showed that, the effect of extract on B. tabaci nymphs  recorded great decline in the rate of mortality to 26.8% compared to 81.6% respectively; The same results on T. tabaci larvae were increased from 23.95% to 77% respectively, by increasing the applied concentration from 125 to 2000 ppm., while when newly emerged E. scutalis adult treated with the same concentration of extract increased total percent mortality such increase was concentration dependent. Indirect exposure technique of is more effective than the direct exposure technique. Therefore, when using the plant extract and the predator in one control program is recommended to spray the extract first and then release the predator about 48 hours later.