Three varieties of soybean namely, Cutter, Crawford and Clark were tested for infestation by certain sucking insects; Aphis spp, Em­poasca spp., Thrips tabaci (L.) and Bemisia tabaci (Genn.) in an attempt to seek for less susceptible varieties to these insect pests. Also, the ef­fect of some climatic factors (temperature, relative humidity and wind velocity) on these insects was determined. The study was carried out at Sakha Agric. Res. Station Farm during 1993 season. The results indicat­ed that the three tested varieties received high populations of aphids, low ones of thrips and relatively moderate numbers of jassids and white-flies. Variety Clark harboured, significantly, the highest number of the considered insects, while Crawford received the lowest number. The three climatic factors correlated insignificantly with T.tabaci, but posi­tively with temperature and negatively with relative humidity and wind velocity in all tested varieties. Temperature, relative humidity and wind velocity jointly affected, by 0.4913, 0.4852 and 0.4265 of variability, thrips populations on Crawford, Cutter and Clark, respectively. Total of Aphis spp., Empoasca app. and 8.tabaci correlated insignificantly and negative with the three climatic factors. Temperature, relative humidity and wind velocity collectively influenced by 0.8264, 0.8140 and 0.8235 of variability, the total populations of these insects on Crawford, Cutter and Clark, respectively. Thus, Crawford variety could be recommended to be cultivated at Kafr El-Sheikh Governorate since it was relatively less susceptible to the sucking insects infestation as an agricultural method in the integrat-