Search results
Results from the WOW.Com Content Network
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 .
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 ...
Pines in this subgenus have one to five needles per fascicle and one fibrovascular bundle per needle, and the fascicle sheaths are deciduous, except in P. nelsonii, where they are persistent. Cone scales are thinner and more flexible than those of subgenus Pinus , except in some species like P. maximartinezii , and cones usually open soon after ...
Young spring growth ("candles") on a loblolly pine: Monterey pine bark: Monterey pine cone on forest floor: Whitebark pine in the Sierra Nevada: Hartweg's pine forest in Mexico: The bark of a pine in Tecpan, Guatemala: A pine, probably P. pseudostrobus, in Guatemala
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
Pinus remota is a small tree or large shrub, reaching 3–10 m tall and with a trunk diameter of up to 40 cm. The bark is thick, rough, and scaly. The leaves ('needles') are in mixed pairs and threes (mostly pairs), slender, 3–5 cm long, and dull gray-green, with stomata on both inner and outer surfaces.
Once the needles are infected, the fungus quickly destroys the tissues within the needle which is the cause for the shoot and needles to become stunted and die after only a small amount of growth. The growth of the fungus is quick and deadly to the needles, traveling “through the needle, then to the stem, and finally into adjacent needles”.