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The Swiss pine is a member of the white pine group, Pinus subgenus Strobus, and like all members of that group, the leaves ('needles') are in fascicles (bundles) of five, with a deciduous sheath. The mature size is typically between 25 metres (82 ft) and 35 metres (115 ft) in height, and the trunk diameter can be up to 1.5 metres (4.9 ft).
Symptoms on Scots pine Symptoms on jack pine. Cyclaneusma (needle cast) is a fungal disease that is a part of the phylum, Ascomycota. It infects plants that are of pine classification. [1] After infection by Cyclaneusma, most pines do not display symptoms until 10 months after the initial infection. Symptoms include needles developing yellow ...
Pinus nigra is a large coniferous evergreen tree, growing to 20–55 metres (66–180 feet) high at maturity and spreading to 6 to 12 m (20 to 39 ft) wide.The bark is gray to yellow-brown, and is widely split by flaking fissures into scaly plates, becoming increasingly fissured with age.
The bristlecone pine's root system is mostly composed of highly branched, shallow roots, while a few large, branching roots provide structural support. The bristlecone pine is extremely drought tolerant due to its branched shallow root system, its waxy needles, and thick needle cuticles that aid in water retention. [8] Gnarled bristlecone pine wood
"Pecherei" is the common expression in southern Lower Austria for the practice of Resin Extraction from black pine trees (). [1] This profession centers around the extraction of tree resin, also known as "Pitch," that will ultimately be used in the production of further chemical products. [1]
Cronartium ribicola has two obligate hosts: Pinus spp and Ribes spp. [5] Five-needle pines (Pinus spp.) are infected in the fall by basidiospores that have spread under cool, moist conditions from the alternate host, currants and gooseberries (Ribes spp.), and germinated on needles to enter with germ tubes through open stomata. [6]
It is a Heldreich's pine estimated at 1,230 years. Much of its core has turned to dust, but there is enough new growth to confirm it is still alive. [2] A notable specimen in the Pirin Mountains of Bulgaria, known as Baikushev's pine, is 24 m (79 ft) tall, 2.2 m (7 ft 3 in) in diameter, and is estimated to be over 1300 years old. [5]
Scots pine, red pine, Mugo pine, Ponderosa pine, and Austrian pine are especially susceptible. Some spruce, fir, and cedar species are also vulnerable to infection. [ 3 ] 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 ...