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Green spruce aphid (Elatobium abietinum) is an important defoliating pest of spruce trees (trees in the Picea genus), especially Sitka spruce (Picea sitchensis), which is widely grown in the...
greater black spruce bark aphid (Cinara piceae) Identification, biology, distribution, host plants, natural enemies, damage caused. Creative commons images.
Damage: Cinara aphids, while not as destructive as some other pest species, can still cause notable damage to coniferous trees. They feed on the sap of these trees, piercing the tree’s tissues with their sharp mouthparts to access the nutrients.
20 sty 2009 · We studied whether the mutualism between wood ants and Cinara aphids affects the growth of boreal Norway spruces (Picea abies L. Karst.) in stands of different ages. In boreal forests, conifers, unlike deciduous trees, have only few defoliating insects, and therefore we expected the growth loss of conifers due to sap sucking by aphids not to be ...
20 sty 2009 · We studied whether the mutualism between wood ants and Cinara aphids affects the growth of boreal Norway spruces (Picea abies L. Karst.) in stands of different ages.
Cinara pilicornis, the spruce shoot aphid or brown spruce shoot aphid, is an aphid species in the genus Cinara found on Norway spruce (Picea abies) and Sitka spruce (Picea sitchensis). It is a quite large aphid species with a plump, dull brown body. It seems to have little effect on the tree.
20 sty 2009 · In boreal forests the effect of ant–aphid mutualism on tree growth can vary with stand age, because forest clear-cutting harms the ecologically most dominant ant partner in such mutualisms, wood ants (Formica rufa group).
