Ring rot fungus, also known as Rhizoctonia solani, is a plant pathogen that causes significant damage to many crops. This fungus can infect potatoes, lettuce, tobacco, sugar beets, and more, leading to serious yield losses for farmers. In addition to "ring rot fungus," this pathogen can also be referred to as "black scurf" or "stem canker fungus." Other synonyms include "turfgrass brown patch" or "web blight" when it affects grasses. Understanding the different terms for this fungal pathogen can help farmers and gardeners identify and treat infections more effectively. Some effective treatment methods include crop rotation, fungicides, and soil sterilization.