What is the causal organism of stem gall disease of coriander? (RJ AARO Horti. 2014)

✅Explanation:
Stem gall disease in coriander is caused by the fungus Protomyces macrosporus. This fungus induces the formation of galls or tumor-like growths on the stems and branches of the coriander plant. These galls disrupt the plant's vascular system, hindering the flow of nutrients and water, ultimately leading to reduced yield and quality.

📌 Other Options Explanations:
-Option A: Fusarium Oxysporum: This fungus is a common soilborne pathogen that causes wilt diseases in various crops.
-Option B: Erysiphae polygoni: This fungus causes powdery mildew disease in several plants, characterized by a white powdery growth on leaves and stems.
-Option D: Pernospora spp.: Species of Pernospora are known to cause downy mildew diseases in many crops.