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  2. Cyclaneusma needle cast - Wikipedia

    en.wikipedia.org/wiki/Cyclaneusma_needle_cast

    The most infected needles are prematurely shed by December. Because the infected needles are within the interior of the tree, the newer needles on the outer surface of the pines are flushed green and resistant to the disease. However, the premature shedding of needles in the interior can extend outwards leading to a loss in overall growth.

  3. Dothistroma septosporum - Wikipedia

    en.wikipedia.org/wiki/Dothistroma_septosporum

    This fungal disease affects the needles of conifers, but is mainly found on pine. Over 60 species have been reported to be prone to infection and Corsican Pine (Pinus nigra ssp. laricio) is the most susceptible species in Great Britain. [3] It was first recorded in Britain on Corsican pine in 1954 in a nursery in Dorset.

  4. Cronartium ribicola - Wikipedia

    en.wikipedia.org/wiki/Cronartium_ribicola

    In addition, young trees will often die at faster rates following infection because more needles are likely to be located closer to the main stem (trunk) of the tree, where infection results in canker formation that kills vital cambial tissue responsible for water and nutrient transport for large parts of the tree.

  5. Brown needles on pine trees could be sign of diplodia tip blight

    www.aol.com/news/brown-needles-pine-trees-could...

    Do you have a mature pine tree with bunches of brown needles? It may be suffering from a fungal disease called diplodia tip blight. “Diplodia has become more common due to environmental stress ...

  6. Sirex woodwasp - Wikipedia

    en.wikipedia.org/wiki/Sirex_woodwasp

    Typical signs of damage on pines: Brown coloration and shedding needles Borehole of a larva. Infestation damage can be divided into four categories or phases, depending on whether it is caused by the imago, fungus, larvae or secondary parasites. The first reaction of the host tree is due to the adult wasp and occurs after 10 to 14 days.

  7. Diplodia tip blight - Wikipedia

    en.wikipedia.org/wiki/Diplodia_tip_blight

    The disease can infect trees of all ages, though trees that are physiologically stressed through water or nutrient deficiencies or wounded via extreme weather or insect damage have a higher incidence of infection. [1] The hallmark symptom of Diplodia tip blight is stunted, brown needles and stems, particularly of new shoots. [4]

  8. Pine-pine gall rust - Wikipedia

    en.wikipedia.org/wiki/Pine-Pine_Gall_Rust

    Pine-pine gall rust, also known as western gall rust, is a fungal disease of pine trees. It is caused by Endocronartium harknessii (asexual name is Peridermium harknessii ), an autoecious , endocyclic , rust fungus that grows in the vascular cambium of the host. [ 1 ]

  9. Christmas tree pests and weeds - Wikipedia

    en.wikipedia.org/wiki/Christmas_tree_pests_and_weeds

    Red band needle blight is a fungal disease which affects coniferous trees, particularly pine, with a worldwide distribution. The disease is caused by the fungi Dothistroma septosporum . Since the late 1990s its appearance in the United Kingdom has increased, among the most affected species is Corsican pine and the disease has been a significant ...

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