Two plants; Hyoscyamus muticus and Ambrosia maritime were chosen in order to investigate the toxticty of their leave, stem, flower or root extracts (using ethanol, acetone, chloroform and hexane) to nymph and adults of Aphis craccivora and its predator Chrysoperla carnea. The plant extracts were treated using direct spraying on infested bean seedlings. The results showed that for the two plant species, high concentration of leave extract in ethanol and acetone gave a high mortality rate after 24 and 48 h. For the flower extracts, high concentration in ethanol and chloroform resulted as well in high mortality rate of the pest after 24 and 48 h. As far as the root extracts are concerned only H.muticus at a high concentration in ethanol gave high mortality rate after 24 and 48 h. For the stem extracts, only H.muticus, at a high concentration in hexane resulted in a high mortality rate after 24 and 48 h. Moreover these high plant extract concentration were not detrimental Ch. carnea and thus can be considered as safe adjuvant in the prospect of integrated pest control.