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Cronartium ribicola is a species of rust fungus in the family Cronartiaceae that causes the disease white pine blister rust. Other names include: Rouille vésiculeuse du pin blanc (French), white pine Blasenrost (German), moho ampolla del pino blanco (Spanish). [2]
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 ...
Pinus mugo is native to the subalpine zones of the Pyrenees, Alps, Ore Mountains, Carpathians, northern and central Apennines, and higher Balkan Peninsula mountains – Rila, Pirin, Korab, Accursed Mountains, etc. It is usually found from 1,000–2,200 m (3,281–7,218 ft), occasionally as low as 200 m (656 ft) in the north of the range in ...
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 ]
Since 1970, millions of Western white pine seedlings have been planted to make up for the losses. [5] The white pine blister rust (Cronartium ribicola) is a fungus that was accidentally introduced from Europe in 1909. The United States Forest Service estimates that 90% of the Western white pines have been killed by the blister rust west of the ...
The cones are borne on a short stem, and have two to four scales, usually only one (sometimes two) fertile, each fertile scale bearing a single apical seed 10–15 mm. When mature, the scales swell up and become reddish purple, fleshy, and berry -like, 10–20 mm long; they are then eaten by birds , which disperse the seeds in their droppings.
Download QR code; Print/export Download as PDF; ... Mountain pine (Pinus mugo) is a species of pine tree. Mountain pine can also refer to: Botany. Mountain pine ...
Chionaspis pinifoliae, the pine needle scale insect, is a common species of scale insect found on pine, spruce and other conifers across Canada and throughout the United States. [1] The species is particularly persistent on planted spruce in the Prairie Provinces in both rural and urban settings. In heavy populations, the needles may appear to ...