What are the symptoms of rose black spot?

• A. Purple or black spots develop on leaves, which turn yellow and drop early.
• B. Leaves turn blue and the plant grows taller.
• C. Leaves curl upward but remain green.
• D. The plant wilts without any spots.

Answer: (A)

Rose black spot shows up as purple or black spots on the leaves, with the surrounding tissue turning yellow and the leaves often dropping earlier than usual. This combination—dark lesions on the foliage that lead to yellowing and premature leaf fall—is the hallmark of the disease, and it reflects how the spots disrupt photosynthesis and weaken the plant.

Other options describe symptoms that aren’t typical for this disease. Blue leaves aren’t a sign of rose black spot, curling leaves can point to other issues like pests or nutrient problems, and wilting without spots suggests different stresses or diseases.