Tree tops killed by stem-girdling cankers do not resprout. Symptoms on the pine include gall formation, stem swelling, cankers, bushiness, and dieback. Diseased trees show vertical orange cankers on the trunk and galls on the lower branches. In these tissues, the pathogen forms diffuse cankers in which the mycelium overwinters. Spider mites, cankers, and galls are a problem with some trees. "W. carpophilus" overwinters in infected buds and in twig cankers. Other fungi can cause leaf scorching, powdery mildew, rust, and cankers. These cankers are necrotic regions where the epidermis is gone. Its fruiting bodies appear as charcoal-black cankers. Because cankers restrict the flow of nutrients, twigs and branches afflicted by cankers eventually die. On these trees the fungus caused more superficial cankers, that appeared to be healing. Affected plants may also look stunted due to poor growth, develop cankers or ooze sap. The trees infected with virus-treated fungus responded immediately and began to heal over their cankers. Disease can affect all parts of the plant, causing spotting, rotting, cankers, pitting, and discoloration. Once infected, these trees will also exhibit orange bark with cankers.