Chemical communication between the leguminous plants (cowpea, white bean and broad bean), aphids (Aphis gossypii, Aphis. fabae and Myzus persicae) and the coccinellidspecies (Coccinella. undecimpunctata L., Coccinella. Septempunctata L. and Cydonia. vicina isis L.)  was evaluated under laboratory conditions(at 26 ± 2.5 ◦C and 68 ± 4.5 RH%). Lady beetles exhibited different degrees of preference to volatile oil extracts of the different tested host plants. However, volatile oils emitted from broad bean attracted the highest percent of both Cyd. vicina isis and C. undecimpunctata, while, C. septempunctata showed preference to white bean oil. On the other hand, all tested predators showed no response to oil extracts from cowpea plants. Broad bean and white bean plants damaged by feeding activity of A. gossypii produced volatile chemicals (synomones) that attracted all tested predators, While, C. septempunctata and Cyd. vicina isis adults only elicited positive response to damaged cowpea plants. Also, feeding by M. persicae or A. fabae on broad bean and white bean seedlings was sufficient to elicit emission of volatiles that attract all predator species in comparison with undamaged leaves. On contrary, all tested predators showed similar response to both damaged and undamaged cowpea seedling. Hexane approved to be the best solvents for kairomone extraction from A. gossypii, Myzus persicae and A. fabae for Cyd. Vicina isis, while acetone was the best one to extract kairomone of all aphid species for C. undecimpunctata.Meanwhile, C. septempunctata adults exhibited positivel response to hexane extract of both, Myzus persicae and A. fabae, and to acetone extracts from A. gossypii