WebThe objective is to determine the impact of these insects on tree growth and timber production, and to estimate the economic costs of damage. The most detailed research has focussed on the impact of green spruce aphid ( Elatobium abietinum) on Sitka spruce. Long-term experiments on the effect of defoliation by this aphid on young Sitka spruce ... http://www.coford.ie/media/coford/content/publications/projectreports/cofordconnects/Aphid.pdf

Damage caused by the Green Spruce Aphid to Norway and

WebSpruce aphid (Elatobium abietinum) is a particularly destructive pest of ornamental spruce. The aphid is very small (1 ⁄ 25" – ⁄ 16" long) and is green. Discovery is difficult because of the insect’s small size and because populations peak in late winter. Damage normally is noticed before the insects are detected. Green spruce aphids are native to continental European spruce forests, particularly in association with Norway spruce (Picea abies). Having co-evolved with green spruce aphid, Norway spruce reacts less to their presence in comparison to other species of spruce, such as Sitka spruce (Picea sitchensis), … See more Green spruce aphid is native to continental Europe, but it is now also known to be present in the UK, North America, Australia, New … See more Although green spruce aphid-induced defoliation results in a relatively low numbers of tree deaths, the loss of needles affects trees’ growth by reducing leader extension and timber volume increment. This can … See more Green spruce aphids are pests almost exclusively of spruce trees. These include its native host, the Norway spruce (P. abies), although Norway spruce is not greatly affected because of their shared evolutionary history … See more Green spruce aphid adults are tiny, between 1 and 2mm long, and are pale to dark green (above, and top picture). They are therefore unlikely to be seen without very close … See more how to remove my identity from the internet

Agricultural and Forest Entomology - Wiley Online Library

WebThe Pineapple gall adelgid ( Adelges abietis) is a type of conifer -feeding insect that forms pineapple-shaped plant galls on its host species, commonly Norway and Sitka spruce. The adelgids (genus Adelges) are pear-shaped, soft-bodied green insects with long antennae, closely related to the aphid. [1] Adelges lays up to one hundred eggs at a ... Web‘Paul’s Select’: A smaller-scale Norway Spruce with a unique blue-green color. Can be used as a specimen, windbreak, or an alternative to a Colorado Blue Spruce. ... It can also be attacked by Spider Mites, Spruce Gall Aphids, and boring insects. These pests and pathogens are typically present when the tree is already stressed. The best ... WebFeb 17, 2024 · The green spruce aphid, E. abietinum (syn. Aphis abietina ), is a significant pest of some species of spruce ( Picea) in parts of Europe. Its ecology and impacts have … norlake customer service