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Oak wilt is a devastating exotic disease, killing some trees rapidly in a single season. [7] Oak wilt is an important disease in urban areas where trees are highly valued. The disease reduces property values because of the loss of trees and is economically costly to the property owner since they or the local government must pay for tree removal.
Cystotheca lanestris, the live oak witch's broom fungus, is a species of mildew that infects buds and induces stem galls called witch's brooms on oak trees in California, Arizona, and Mexico in North America. [2] [3] Witch's brooms are "abnormal clusters of shoots that are thickened, elongated, and highly branched." [4]
Phytophthora ramorum. Phytophthora ramorum is the oomycete known to cause the disease sudden oak death (SOD). The disease kills oak and other species of trees and has had devastating effects on the oak populations in California and Oregon, as well as being present in Europe. Symptoms include bleeding cankers on the tree's trunk and dieback of ...
Inonotus dryadeus (syn. Pseudoinonotus dryadeus), commonly known as oak bracket, warted oak polypore, weeping polypore or weeping conk, is an inedible species of fungus belonging to the genus Inonotus, which consists of bracket fungi with fibrous flesh. Most often found growing at the base of oak trees, it causes white rot and decay of the trunks.
Taphrina caerulescens is a species of fungus in the family Taphrinaceae. It is a pathogenic Ascomycete fungus that causes oak leaf blister disease on various species of oak trees (Quercus spp.). The associated anamorph species is Lalaria coccinea, described in 1990. [2] This disease causes lesions and blisters on Oak leaves.
Ganoderma applanatum is parasitic and saprophytic, [2] and grows as a mycelium within the wood of living and dead trees. It grows in single, scattered, or compound formations. [2] It forms fruiting bodies that are 3–30 centimetres (1–12 inches) wide, 5–50 cm (2– 19⁄2 in) long and 1–10 cm (⁄2 –4 in) thick, [1] hard as leather ...
Botryosphaeria corticola. Bot canker of oak is a disease on stems, branches and twigs of oak trees in Europe and North America. The casual agent of Bot canker of oak is the fungus Botryosphaeria corticola. Bot canker of oak causes lesions and cankers on a wide range of oaks in Europe and most recently live oaks in North America.
In mature trees the disease is generally less damaging, but in combination with other factors such as defoliation by insects can contribute to tree decline. A study of the effects of E. alphitoides on Quercus robur found it decreased stomatal conductance by 15–30%, did not affect the leaf mass to area ratio, decreased the nitrogen content of ...
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