Sycamore anthracnose is a disfiguring disease of sycamore and plane trees (Platanus sp.) caused by the fungus Apiognomonia veneta. Believed to be native to the United States it is found throughout the range of sycamores. The fungus spreads from infected to healthy trees as spores carried by the wind or rain. Although not a fatal disease by itself, sycamore anthracnose often weakens a tree making it more susceptible to other pests and issues.