Geomatics Based Soil Mapping of the Eastern Desert Part of Sohag Governorate, Egypt
The preventative and curative effects of some plant derived agents based on plant extracts or essential oils were studied at different concentrations against _Erysiphe cichoracearum _DC. ex Merat, the causal pathogen of okra powdery mildew by the detached leaf-disk and potted plants bioassays. Through detached leaf-disk assay, the highest mean preventative effect (97.74%) was recorded by neem seed oil followed ... إقراء المزيد