The relative attractiveness of flowering plants to some aphidophagous species; predators (Syrphus corollae Fabricius, Chrysoperla carnea Steph., Coccinella undecimpunctata L.and Paederus alfierii Koch,and the parasitic wasp Aphidius sp. was evaluated under laboratory conditions. Flowers included: coriander (Coriandrum sativum L) chamomile ,  (Matricaria chamomilla, ) geranium  (Pelargonium graveolens Ait ) and Fennel ( Foeniculum vulgare .Miller ) sweet basil ( Ocimum basillicum, L, ). The obtained results revealed that the tested natural enemies exhibited different degrees of selectivity in response to olfactory stimulant produced by the flowers. Chamomile flowers exhibited higher attractiveness to the hoverflies (S. corollae) than to  the other tested predators .Chry carnea exposed to different flowers oduor  showed the highest attractiveness to fennel followed by coriander with no significant differences. Coriander, chamomile and fennel flowers attracted the highest percentage of C. undecimpunctata adults with no significant differences. P alferii recorded the highest percentage of attractiveness towards   sweet basil ( Ocimum basillicum, L, ) flowers .Choise tests illustrated that Chry. carena, S. corollae and C.undecimpunctata exhibited the lowest preferabilty to geranium  and sweet basil. On the contrary.  P, alferii ., showed the highest preferabilty tosweet basilflower. Flower color may influences choice. Yellow and white flowers were particularly attractive Chamomile, fennel, and sweet basil flower colors were preferred by all tested natural enemies. Choice and no choice tests recorded that the   aphelinid parasitoid Aphidius sp. exhibited the highest percentage of attractiveness and prefferability to flower color of chamomileand coriander . coriander and chamomile flowers increased longevity in C. undecimpunctata. Mean longevity was 45.0 ± 8.9 days with only water, 51.0 ± 3.0 days with chamomile flowers and 58.7 ± 6.5 days when given access to coriander flowers. Parasitism percentage by the aphelinid parasitoid, Aphidius sp .adult  significantly increased when fed on coriander or chamomile in comparison with control. So, Coriander and Chamomile could be a potential insectary plants for enhancing parasitoid fitness and efficacy.