الفهرس 
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Abstract
This study aims to survey of sugar beet powdery mildew around Assiut and El-Minia Governorates, evaluate the effect of the disease on the yield of sugar beet cultivars left for natural infection, determination of some chemical components related to tolerance and susceptibility of sugar beet cultivars, detect physiological changes related to powdery mildew infection and possible management of sugar beet powdery mildew using fungicide alternatives.