Potato mildew, also known as late blight, is a devastating disease that affects potato crops worldwide. Synonyms for potato mildew include Phytophthora infestans, potato blight, and tomato blight. The disease is caused by a fungus-like organism that spreads rapidly and destroys the leaves, stems, and tubers of the potato plant. Symptoms of potato mildew include dark blotches on leaves, rings on tubers, and a foul odor. Infected potatoes are often unsuitable for consumption, causing economic losses for farmers. Prevention measures include crop rotation, fungicide application, and maintaining good soil health. Early detection and management of potato mildew are essential to protect crops and ensure a sustainable potato industry.