Anthracnose is the term associated with various fungal infections, including one specific to willow trees and a disease of the marrow family.
Anthracnose affects plants either as a whole or as several parts. It creates dark and sunken lesions on developing shoots, entire plant, expanding leaves, flowers, fruits and vegetables.
However, the term is often associated with beans as bean anthracnose being a disease of dwarf and less frequently, runner beans. Dark-brown spots develop, which are sunken into the surface of the leaves, stems and pods of the beans.
Anthracnose possesses the ability to spread rapidly during rainy seasons. Transmission occurs through seeds. In several cases, anthracnose might not create enduring damage to established trees.
Moreover, successive years of defoliation can decrease the vigor of the tree, increase the weakness and thus predisposing the plant to opportunistic pests that may further damage the plant. Treatment is by destroying the plants and avoiding to plant beans in its habitat for several years.