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[48] [49] The natural durability varies between tree species, geographic regions, environmental conditions, growth stage, and increases with the age. Thereby, some trees are more resistant to fungal diseases and insects and their timber lasts longer than other trees. Notably, the timber of these trees remain durable for a long-time period, even ...
The fungus infects new growth of juniper trees or shrubs, i.e. the seedlings or young shoots of mature trees. Infection begins with the germination of asexual conidia, borne from pycnidia, on susceptible tissue, the mycelia gradually move inwards down the branch, and into the main stem. Management strategies mainly include removing and ...
This fungus overwinters in swellings or galls on infected twigs and branches of susceptible juniper plants. In the spring after a rain or heavy dew, the galls on the juniper produce tiny dark horn-like growths that become covered with an orange-brown gelatinous mass called telia. The corresponding stage on the pear trees is known as aecia.
Witch's brooms on downy birch, caused by the fungus Taphrina betulina Witch's broom on a white pine. Witch's broom in Yamaska National Park, QC. Witch's broom or witches' broom is a deformity in a woody plant, typically a tree, where the natural structure of the plant is changed.
The fungus often forms a black coating layer on tree bark and leaves. However, this does not seem to harm the plants by blocking the lenticels or significantly reduce their growth rates. Deciduous species also develop new leaves annually, rendering it less important when older leaves are covered by the growths.
Porodaedalea pini, commonly known as the pine conk, [1] is a species of fungus in the family Hymenochaetaceae. It is a plant pathogen that causes tree disease commonly known as "red ring rot" or "white speck". This disease, extremely common in the conifers of North America, decays tree trunks, rendering them useless for lumber. [2]
Photosynthesis was also shown to be increased in Douglas fir seedlings by the transport of carbon, nitrogen and water from an older tree connected by a mycorrhizal network. [54] Furthermore, nutrient transfer from older to younger trees on a network can dramatically increase growth rates of the younger receivers. [55]
Heart rot is a major factor in the economics of logging and the natural growth dynamic of many older forests. Heart rot is prevalent throughout the world affecting all hardwood trees and can be very difficult to prevent. A good indication of heart rot is the presence of mushrooms or fungus conks on the tree.
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