Leaf blight is a plant disease characterized by the appearance of dark, water-soaked spots on leaves, which can eventually lead to leaf death. It is often caused by various fungi or bacteria that thrive in warm, moist conditions. This disease can affect a wide range of plants, including crops and ornamental species, leading to reduced growth and yield. Management of leaf blight typically involves improving air circulation around plants, practicing crop rotation, and applying fungicides or bactericides when necessary. Regular monitoring for early signs of the disease can help prevent its spread and minimize damage to affected plants, ensuring healthier growth for species like tomatoes and roses.