Elatobium abietinum

Spruce aphid

Description

Elatobium abietinum, also known as the spruce aphid or green spruce aphid, is an aphid species belonging to the Aphidinae subfamily. It primarily feeds on spruce (Picea spp., common on Picea pungens) and, occasionally, fir (Abies spp.). This aphid species is indigenous to Northern, Central, and Eastern Europe but has extended its habitat to Western Europe, North America, and beyond. The wingless adults of Elatobium abietinum typically exhibit varying shades of green, sometimes featuring a slight waxy coating, and measure approximately 2 mm in length. During spring, winged aphids appear, later on dispersing to other trees. Young nymphs enter a diapause during the summer months, resuming development come autumn. While in Europe both, males and females occurs, in other global regions, only females have been documented. The presence of Elatobium abietinum poses a threat to tree health by reducing growth rates and makes trees more vulnerable to attacks by other pests. Severe defoliation, a consequence of aphid infestation, has the potential to fatally harm the tree.

Symptom

Infested spruce trees may exhibit discoloration of needles, often turning yellow or brown due to aphid feeding damage. Aphid feeding can hinder the growth and development of affected trees. Aphids produce a sticky substance called honeydew as they feed, which can coat needles and branches, promoting the growth of sooty mold and attracting other pests. Presence of green aphids on needles and branches.

Tree Species: Fir, Spruce

Part of a plant- attacked: Leaf / Needle

Pest significance: Very harmful

Pest Category: Insects

Invasive Species: No

Present in EU: Yes