Tomato blight is a common plant disease that affects tomato plants, caused primarily by fungal pathogens like Phytophthora infestans. It leads to dark spots on leaves, stems, and fruits, which can eventually cause the plant to wilt and die. This disease thrives in warm, moist conditions, making it particularly problematic during humid weather. To manage tomato blight, gardeners can practice crop rotation, use resistant varieties, and ensure proper spacing for air circulation. Regularly removing infected plant material and applying fungicides can also help control the spread of the disease, protecting healthy plants and improving yields.