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Goldenrod aphidOn this page: Identification & Distribution Biology & Ecology Other aphids on the same host
Identification & Distribution:
Uroleucon solidaginis apterae are shining reddish brown, with rows of dark hair-bearing scleroites. Their antennae are longer than the body and the third antennal segment is as dark as the rest of the antennae. Uroleucon solidaginis antennae and legs are mainly yellowish brown with the apical parts of the femora, knees and tips of tibiae dark. There are no antesiphuncular sclerites. Both the siphunculi and cauda are black, and their siphunculi are 1.6-2.1 times as long as the cauda. The distal 25% of the siphunculi is reticulated. Uroleucon solidaginis body length ranges from 2.3 to 4.1 mm.
The goldenrod aphid is found on the upper parts of goldenrod (Solidago virgaurea). It does not host alternate. Oviparae and alate males can be found from mid-July to October. Uroleucon solidaginis is found in Europe, Asia, north Africa and North America.
Biology & Ecology:
We have only found the aphid Uroleucon solidaginis on one occasion - on a small group of plants of Solidago virgaurea at Dundreggan in Scotland.
There was only one live aphid in the colony (a fourth instar nymph) and this was reared through to the adult for identification purposes (see picture above). Most of the colony had been parasitized, so the plant was covered with large numbers of golden brown mummies.
All primary parasitoids had already emerged, so we cannot make a positive identification of the parasitoids. The most commonly recorded species attacking Uroleucon solidaginis are Aphidius funebris (Tomanovic et al, 2003) and Ephedrus persicae (Tomanovic et al, 2009).
Two species of hyperparasitoid (parasitoid of the primary parasite) were reared from two Uroleucon solidaginis mummies. They were identified as Alloxysta arcuata and Phaenoglyphis villosa.
The hyperparasitoid Phaenoglyphis villosa is pictured above.
Other aphids on same host:
Uroleucon solidaginis has been recorded on 3 Solidago species (Solidago canadensis, Solidago decurrens, Solidago virgaurea).