Black Sigatoka is a fungal disease that affects banana plants, primarily caused by the fungus Mycosphaerella fijiensis. It leads to dark streaks on the leaves, which can reduce photosynthesis and ultimately decrease fruit yield. The disease is particularly problematic in tropical regions where bananas are a major crop. Control measures for Black Sigatoka include the use of resistant banana varieties, proper sanitation, and fungicide applications. Farmers are encouraged to monitor their crops regularly to detect early signs of the disease, which can help in managing its spread and minimizing economic losses.