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Phomopsis dieback Phomopsis spp. Phyllosticta leaf spot Phyllosticta spp. Phytophthora blight and dieback Phytophthora nicotianae var. parasitica = Phytophthora parasitica. Phytophthora root rot and wilt Phytophthora cinnamomi Phytophthora nicotianae var. parasitica. Powdery mildew Erysiphe polygoni Microsphaera penicillata. Pucciniastrum leaf rust
Jizera Mountains in Central Europe in 2006 Tree dieback because of persistent drought in the Saxonian Vogtland in 2020. Forest dieback (also "Waldsterben", a German loan word, pronounced [ˈvaltˌʃtɛʁbn̩] ⓘ) is a condition in trees or woody plants in which peripheral parts are killed, either by pathogens, parasites or conditions like acid rain, drought, [1] and more.
Hymenoscyphus fraxineus is an ascomycete fungus that causes ash dieback, a chronic fungal disease of ash trees in Europe characterised by leaf loss and crown dieback in infected trees. The fungus was first scientifically described in 2006 under the name Chalara fraxinea .
Dieback may refer to a number of plant problems and diseases including: Forest dieback caused by acid rain, heavy metal pollution, or imported pathogens; The death of regions of a plant or similar organism caused by physical damage, such as from pruning; Those caused by the genus Eutypa, such as Eutypa dieback
The Azalea Society of America designated Houston, Texas, an "azalea city". [citation needed] The River Oaks Garden Club has conducted the Houston Azalea Trail every spring since 1935. [citation needed] Valdosta, Georgia is called the Azalea City, as the plant grows in profusion there. The city hosts an annual Azalea Festival in March.
In Australia, where it is known as phytophthora dieback, dieback, jarrah dieback or cinnamon fungus, Phytophthora cinnamomi can infect thousands of native plants, causing damage to forests and removing habitats for wildlife. [12] [13] [14] Several native plants are at risk of extinction due to the effects of the disease. [12]
A branch, also called a ramus in botany, is a stem that grows off from another stem, or when structures like veins in leaves are divided into smaller veins. [1]
European ash in flower Narrow-leafed ash (Fraxinus angustifolia) shoot with leaves. Fraxinus (/ ˈ f r æ k s ɪ n ə s /), commonly called ash, is a genus of plants in the olive and lilac family, Oleaceae, [4] and comprises 45–65 species of usually medium-to-large trees, most of which are deciduous trees, although some subtropical species are evergreen trees.