Three different materials of different groups, the first: surfactants (Sisi-6), the second : acidic materials (sulphonic acid) and the third: sticking agent (glue), of those proved pesticidal efficiency against other insects, were tested for controlling scale insects infested citrus trees. The following physico-chemical properties for the tested materials were determined : solubility in water, free acidity or alkalinity and surface tension of their solutions in water at concentrations 0.5, 1.0 and 1.5 %, also their pesticidal efficiency against scale insects were determined by spraying each concentration on three branches of orange tree highly infested with the black parlatoria scale insect. Parlatoria ziziphus (Locus). Infestation was determined before spraying and after 30 days of spraying then reduction percentage were calculateted. Obtained results indicated that all tested materials showed suitable solubility in water also indicated that sulphonic acid showed higly acidity while glue is high in alkalinity and all tested materials reduced surface tension of water, sulphonic followed by Sisi-6 showed the higher effect followed by glue. The above physico-chemical properties indicated that the tested material could be use as spraying by dissolving them in water, also give a predication that they will give high scalicide effect. Results of semi-field experiment indicated that all tested materials showed high scalicide effect as indicated by % mean reduction of inspected individual (pre-adult, adult female and graved female)and it could be said that Sisi -6 at 0.5,1.0, 1.5%and sulphonic at 1.5%and 1.5%glue gave successful control of this pest without showing any phytotoxic effect.