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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 ...
The Torrey pine (Pinus torreyana) is a rare pine species in California, United States. It is a critically endangered species growing only in coastal San Diego County, and on Santa Rosa Island, offshore from Santa Barbara in Santa Barbara County. [3] The Torrey pine is endemic to the California coastal sage and chaparral ecoregion. [4] [5]
The pine needles are in fascicles (bundles) of three, distinctively pale gray-green, sparse and drooping, and grow to 20–30 centimetres (8–12 in) in length. The seed cones are large and heavy, 12–35 cm ( 4 + 3 ⁄ 4 – 13 + 3 ⁄ 4 inches) in length and almost as wide as they are long.
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
Giving clean syringes to people who inject drugs has been found to curb the spread of disease. But syringe programs are being banned in many California communities. The state is fighting back.
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Dothistroma septosporum or Mycosphaerella pini is a fungus that causes the disease commonly known as red band needle blight. This fungal disease affects the needles of conifers , but is mainly found on pine .