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[48] [49] [50] Individual western red cedar trees vary in susceptibility to the disease and although all age classes are affected, seedlings and young trees suffer the most. [ 7 ] [ 9 ] [ 51 ] [ 52 ] [ 53 ] A physiological change in western red cedar appears to account for an increase in blight resistance for certain individual trees when they ...
Gymnosporangium juniperi-virginianae is a plant pathogen that causes cedar-apple rust. [1] In virtually any location where apples or crabapples and eastern red cedar (Juniperus virginiana) coexist, cedar apple rust can be a destructive or disfiguring disease on both the apples and cedars.
This pathogen was first noted to cause disease in around 1920 on nursery stock near Seattle. [1] [2] Pacific yew (Taxus brevifolia) is also vulnerable to P. lateralis [3] [4] but less susceptible than Lawson cypress trees, and tree mortality has only been observed in areas where C. lawsoniana trees were also infected.
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Gymnosporangium globosum is a heteroecious rust fungus that requires two hosts to complete its life cycle. Its telial stage occurs on eastern red cedar, Rocky Mountain juniper, southern red cedar, and other common junipers while its aecial stage will be found on apple, crabapple, hawthorne, and occasionally on pear, quince, and serviceberry.
Chamaecyparis lawsoniana, known as Port Orford cedar [2] or Lawson's cypress, [3] is a species of conifer in the genus Chamaecyparis, family Cupressaceae. It is native to Oregon and northwestern California , and grows from sea level up to 1,500 metres (4,900 ft) in the valleys of the Klamath Mountains , often along streams.
] Several Hindu legends refer to this tree. For example, Valmiki Ramayan reads: [27] In the stands of Lodhra trees, [28] Padmaka trees [29] and in the woods of Devadaru, or Deodar trees, Ravana is to be searched there and there, together with Sita. [4-43-13] The deodar is the national tree of Pakistan, [30] and the state tree of Himachal ...
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