Anionic surfactant sodium dodecyl sulphat (SDS) was used as wetting agent to prepare citric acid as soluble powder formulation. The prepared formulation showed stability and passed successfully all physico-chemical properties for soluble powder formulations. The insecticidal activity of active ingredient and its formulations were compared with citric acid (SP 90%) that prepared by El-kady (2008) through using non-ionic surfactant against different stages of Aphis craccivora under laboratory conditions.            The results showed that, the active ingredient showed a slight activity against Aphis craccivora after two hours from treatment and increased gradually to give the high effectiveness after 12 hours. On the other hand all formulations were more effective against nymphs than adults and winged. With the other point of view the prepared Sp formulations were more effective than their active ingredient. The increasing in this effectiveness of test formulations depended on type of wetting agents, exposure periods and treated stage.