A wide variety of adjuvants surfactants are available fair therefore need to choose a suitable surfactant to give maximum system enables to choose proper surfactant with ease and enhanced the insecticide effectiveness and raises the perseverance of insecticides. This study swivel, the influence of adjuvants Triton ® X-405 (Octylphenol ethoxylate), Codacide oil), Silwet Gold ® (Trisiloxane Alkoxylates) to enhance the toxicity of (Lufenuron, Profenofos, and cypermethrin) as mercantile insecticides recommended against Egyptian cotton leafworm (CLW) Spodoptera littoralis. The results pointed out that the amalgamation of the adjuvants and halfrecommended field rate of insecticides increased the toxicity of tested insecticides and decreased the rate of field application, decreases the surface tension of spray solutions to a much lower range, high range of (HLB) hydrophile-lipophile balance. Moreover, comparing sedimentation after half an hour of mixing as well as foaming after half an hour of mixing results gives different values in Emulsion properties (foaming and Stability).