Ceratocystis fungi are a group of plant pathogens known for causing diseases in various trees and crops. They thrive in woody plants and can lead to significant economic losses in agriculture and forestry. These fungi often enter plants through wounds and can spread rapidly, affecting the vascular system. Some species of Ceratocystis are also studied for their potential in biocontrol and biotechnology. They can produce enzymes that break down plant materials, making them of interest for applications in biofuel production and waste management. Understanding these fungi is crucial for managing plant health and developing sustainable agricultural practices.