Anthracnose is best described as which of the following?

• A. Disease caused by a fungus that produces asexual spores in an acervulus, usually characterized by ulcer-like areas on the host.
• B. Insect feeding damage causes holes in leaves.
• C. A type of soil amendment used to improve drainage.
• D. A method of pruning shrubs in winter.

Answer: (A)

Anthracnose is a fungal disease of plants. It is typically caused by Colletotrichum and related fungi, and a defining feature is the production of asexual spores inside structures called acervuli on the infected tissue. These acervuli release conidia that spread during wet conditions, producing the characteristic ulcer-like, sunken lesions on leaves, stems, flowers, or fruit. So the best description is a fungal disease that forms acervuli with asexual spores and causes ulcer-like areas on the host. The other options describe insect feeding, a soil amendment, or a pruning method, which do not reflect this fungal, symptom- and structure-specific description.