Anton de Bary initiated the Physiological Plant Pathology with the fungus?

✅ Explanation: Anton de Bary's pioneering work in physiological plant pathology was significantly advanced through his studies on Botrytis cinerea, a fungus that causes gray mold on various plants. His investigations into the life cycle, infection process, and physiological interactions of this fungus with its host plants established fundamental principles in understanding plant diseases.

📌Other Options Explanations:
-Option B: Plasmopara viticola: This oomycete causes downy mildew in grapes, an important plant pathogen.
-Option D: Mucor pusilus: This fungus is a common saprophyte found in soil and decaying organic matter.