The response of the five tomato cultivars gakal, E446, Gordean, Entersia and E448 to Bemisia tabaci  (Genn.) Infestation was tested under field conditions at Fayoum district, Fayoum Governorate.  Tomato Cultivars showed different susceptibility to white fly, B. tabaci.   Obtained results indicated that, E446 and E448 cultivars were the highest susceptible, while Jakal cultivar was the lowest.                 The percentages of mature green and mature pink fruits had a little amounts of non-reducing sugars as compared to the Reducing sugars.  The Ascorbic acid (Vitamine C) content was increased in the mature pink tomato frouits