دسته بندی : پاورپوینت نوع فایل: ppt _ pptx ( قابلیت ویرایش ) قسمتی از اسلاید متن پاورپوینت : تعداد اسلاید : 20 صفحه عنوانبیماریهای cucumber Powdery Mildew 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 die.The fungus can be introduced on gr ...