Fig rust causes yellow-brown leaves that drop in late summer or early fall. Black knot is a widespread fungal disease that attacks plum and cherry trees, both fruiting and ornamental. Other Details: Little is known about this fungus. The Verticillium, verticilosis or wilt olive tree is a disease caused by a soil fungus, its treatment being very difficult. Olive Knot. Tree Fungal Diseases. Root rot is easier to control because it does not spread naturally. Beech Bark Disease affects beech trees and is caused by the combination of a beech scale insect’s feeding habits and an opportunistic fungal pathogen. Selecting a healthy tree and ideal planting site, as well as, watering during periods of drought and fertilizing all contribute to maintaining healthy trees. Pine Needle Diseases in ArkansasMost pine needle diseases are fungal and cause only temporary problems. Powdery mildew is a fungal disease of apple trees. Fungal Diseases. This is a much more serious disease that affects all kinds of maples, but Sugar Maple and Silver Maple are the ones most commonly affected. Elsinoë Leaf spot (Dogwood) Fire Blight. In essence, the trees show signs of infection only after the infection has begun to deteriorate the tree. Untreated fungal diseases in peach trees are a common cause of tree loss, but preventing many of these diseases is possible with timely spraying of fungicides. Verticillium wilt is uncontrollable once the tree is infected. The fungus can overwinter on the ground on infected leaves and infected twigs, where you can see light brown swellings. The infecting spores arise from the black knots and spread by wind and rain. Cankers-Trees and Shrubs. Powdery mildew presents itself as a white powder-like substance on the lower leaves of the tree and can be treated by spraying trees with a fungicide. Powdery mildew. They can spread to other trees in the area, and they can quickly take over and kill the tree. Brittle cinder. Mildew-based fungi commonly affect mulberry trees. Sudden Oak Death (Phytophthora ramorum Blight) This non-native fungal disease is often lethal to oaks. Although symptoms vary by disease, common tree symptoms include growth stunt, twig and branch dieback, foliage discoloration and wilt. Shot hole- cherry. You can see powdery mildew during times of high humidity, and it also grows well during hot, dry weather. The best defense against tree pathogens is maintaining a healthy tree. Threat Level: Severe (the fungus damages the tree's innards, and generally containing the disease means removing the tree) Sapstreak is a ground-living fungus that generally enters the tree's system via an injury near the roots or bottom portion of the tree. Infections caused by canker pathogens often results in bark and wood cankers, leading to profuse gumming near the affected area and eventual girdling and loss of an entire scaffold branch or tree. Other factors affecting tree disease include climate and where the tree or trees are planted. Good general care also keeps peach trees strong, protecting them from fungal diseases and other pest problems. Inonotus radiatus. Plant diseases rarely kill the tree or shrub quickly. They weaken the overall vigor of the plant. Infection can occur on both healthy and mechanically injured woody tissue of the current season's growth. Black Knot is a fungal disease of cherries, plums and other stone fruit trees. This fungal disease is also known as Phymatotrichum root rot, Texas root rot, and Ozonium root rot. Beech bark disease is a newer threat affecting beech trees (Fagus grandifolia), and it’s brought about by native nectria fungus pairing up with the invasive European beech scale insect. Seiridium and Botryosphaeria canker of Leylands. The most common tree diseases are caused by fungi, though some diseases are caused by bacteria or viruses. Not all parts of a tree … Olive knot, is a olive tree disease of bacterial origin. When this happens, water and nutrients are unable to reach branches and leaves. Cotton root rot is most prominent in the Southwestern United States. Stereum rugosum . Lichens Needle cast diseases. Fungal tree diseases are not treatable in a curative fashion; therefore, management efforts must focus on prevention. See photo - credit U.S. Forest Service. Artists conk. Its early symptoms start showing in July and August. Verticillium wilt is a fungus that enters the plant through roots. Plant diseases caused by fungi can be divided into four categories: Butt and root rot diseases: It is one of the most common fungal diseases. (Yuck!) Cytospora canker, caused by the fungus Cytospora kunzei (also known as Valsa kunzei var. Birch polypore. Occasionally, Cytospora canker is found on Douglas-fir, hemlock, and larch. It causes twig and branch swelling and discoloration, resulting in girdling and dieback of branches and sometimes the main stem. Apples trees and eastern red cedars found east of the Rocky Mountains are susceptible to cedar apple rust, a fungal diseases caused by Gymnosporangium juniperi-virginianae. Kretzschmaria deusta. Fungal citrus diseases (35 P) F Fungal conifer pathogens and diseases (16 P) G Grapevine trunk diseases (18 P) Pages in category "Fungal tree pathogens and diseases" The following 200 pages are in this category, out of approximately 285 total. The insects feed on the beech sap by burrowing into the bark, and once inside, the nectria fungus on the beech scale colonize the bark and interior of the tree. Diseases in trees are derived from fungi, viral or bacterial sources. Another fungal disease that is spread on the wind, hull rot most often afflicts tree that are over watered and/or over-fertilized. 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