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Blue spruce usually grows in cool and humid climatic zones where the annual precipitation mainly occurs in the summer. [29] Blue spruce is most common in Colorado and the Southwest. The annual average temperature ranges from 3.9 to 6.1 degrees C (39 to 43 degrees F). And ranges from - 3.9 to - 2.8 degrees C (25 to 27 degrees F) in January.
The plant pathogenic fungus Leucostoma kunzei (formerly Valsa kunzei) is the causal agent of Leucostoma canker (also known as Cytospora canker or spruce canker), a disease of spruce trees found in the Northern Hemisphere, predominantly on Norway spruce (Picea abies) and Colorado blue spruce (Picea pungens).
Picea engelmannii is a medium-sized to large evergreen tree growing to 25–40 metres (82–131 feet) tall, exceptionally to 65 m (213 ft) tall, and with a trunk diameter of up to 1.5 m (4 ft 11 in). The reddish bark is thin and scaly, [ 6 ] flaking off in small circular plates 5–10 centimetres (2–4 in) across.
The sand desert shrub (SDS) is a plant community, or vegetation type, found in the Colorado Plateau and Canyonlands region in areas of shifting sands or very sandy soils. [1]: 3 Dominant plant species include old man sage (Artemisia filifolia), yucca, Indian ricegrass (Stipa hymenoides), and wavy leaf oak (Quercus welshii).
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Dendroctonus rufipennis, the spruce beetle, is a species of bark beetle native to British Columbia, Newfoundland and Labrador, Nova Scotia, Ontario, Quebec, Northern Manitoba, the Yukon, Alaska, Colorado, Wyoming, Montana, and Maine. They are known to destroy forests of spruce trees [1] including Engelmann, White, [2] Sitka, and Colorado blue ...
Blue Grama (Bouteloua gracilis) State insect: Colorado Hairstreak Butterfly (Hypaurotis cysaluswas) State mammal: Rocky Mountain Bighorn Sheep (Ovis canadensis) State pets: Colorado shelter pets (Canis lupus familiaris & Felis catus) State reptile: Western Painted Turtle (Chrysemys picta bellii) State tree: Colorado Blue Spruce (Picea pungens)
The gall adelgid (Adelges cooleyi) is an adelgid species that produces galls in spruce trees. They infect the new buds of native spruce trees in the foothills of the Rocky Mountains in the spring. They also attack blue spruce to a lesser degree. The insects complete two generations within the year.