eng Oriental Scientific Publishing Company Biosciences Biotechnology Research Asia 0973-1245 2019-12-28 16 4 811 815 10.13005/bbra/2798 35019 article Emam S. E. Abdallah 1 Samia A.G. Metwally 1 Wafai Z. A. Mikhail 2 Plant Protection Research Institute, Agricultural Research Center, Dokki, Giza, Egypt Department of Natural Resources, Faculty of African Postgraduate Studies, Giza, Egypt The present study was carried out in experimental farm of the Plant Protection Research Institute, Qaha, Qalyubiya Governorate during Nile seasons. The study was carried out to evaluate the susceptibility of three cucumber hybrids, Hayel, Ashrak and Bahi, to infestation rate of main destructive pests during two successive seasons 2015 and 2016, whitefly, Bemisia tabaci (Genn.) and Tetranychus urticae. The statistical analysis of the mean number showed significant differences during the two seasons. During the second season hybrids showed significant differentiation. The hybrids (Bahi and Hayel) recorded highest mean number of B. tabaci, followed by hybrid Ashrak with lowest mean number of B. tabaci. The seasonal abundance of the movable stage T. urticae was higher during 2016 than 2015. The statistical analysis of the mean number of movable stage of T. urticae showed significant differentiation for the two successive seasons.  On the other hand, population fluctuation of movable stage of T. urticae for the three tested hybrids showed significant differences in the both seasons during three sowing plantation dates indicated significant too. https://www.biotech-asia.org/vol16no4/susceptibility-of-certain-cucumber-hybrids-cucumis-sativus-l-through-different-planting-dates-for-main-pest-infestation-under-field-conditions-2/ Ashrek; Bahi; Cucumber Cultivars; Hayel; Nili Cultivations; Red Spider Mite; White Fly Nymphs