پاورپوینت بيماری های cucumber نوع فایل: پاورپوینت قابل ویرایش 20اسلاید caused by the fungus Erysiphe cichoracearum, affects cucumber, muskmelon, pumpkin, and squash. It is caused by a fungus that appears as a white powdery growth on leaves. Crown leaves are affected first and may wither and