Two experiments were conducted at Sakha Agricultural Research Station during 1999 cotton growing season to evaluate the initial and residual effect of three natural materials in addition to five biocides on some cotton sucking pests and their associated natural enemies. Summarized results showed the following: Kz-oil and Milbeknock induced the highest initial and residual activity on aphids 71.62 and 77.61% reduction after 2 days and 56.89 & 53.74% reduction after 14 days for Kz-oil and milbecknock, respectively. Supermisrona, naturalis, MVP II and bankol had a moderate effect in this respect. Vapcomic at the higher two rates induced a moderate initial kill, biofly by 3 rates and vapcomic at 208.25 cm³/Fed. had a least effect, while vapcomic at 833.3 cm³/Fed. caused the best results to residual activity. On the other hand, all tested products caused no satisfactory effect on jassids as initial and residual activity.                 For the effect on immature stages of whitefly, milbecknock and supermisrona induced the moderate initial and residual effect, while Kz-oil, naturalis, MVP II and bankol induced a slight initial and residual activity, all tested products (2^nd experiment) caused weak initial kill (ranged from 0 to 38.41%). The residual effect of the tested treatments data proved that vapcomic at the higher rate induced the best results in population of immature stages followed closely by the highest rate of biofly, then vapcomic and biofly, at the two lower rates.                 On the other hand, all the tested products in two experiments caused no satisfactory effect on mature stages as initial and residual activity. Their initial kill ranged between (14.92 to 28.20% reduction), while they caused residual activity ranged between (0.89% to 17.81% reduction).                 As for the side effect on the associated natural enemies, all the tested compounds had no  effect on Coccinella undecimpunctata except the higher rates from biofly and vapcomic. Also all tested treatments in the first experiment and biofly at 200 cm³/fed. had no  effect on Scymnus syriacus, while other treatments caused slight effect except vapcomic 833.3 cm³ that induced most effect. All tested compounds also differently decreased population density of Sc. punctillum, which ranged between about (1.18 to 34.12% reduction) in the two experiments.                 On the other hand, milbeknock, bankol, supermisrona, biofly at the higher rates Kz-oil and vapcomic at the lower rates have decreasing effect on the population density of Orius sp. than the untreated check. While, naturalise, MVP II, biofly at the two lower rates and vapcomic at the two higher rates had no effect on Orius sp. All tested treatments had no effect on Chrysoperla carnea except naturalis and MVP II. While Paederus alfierii and true spiders were affected only with high rates of bankol and vapcomic