Leaf-curl
Guides
Ceruraphis eriophori
Wayfaring Tree-sedge Aphid
Ceruraphis eriophori is an aphid species with a heteroecous life cycle involving host alternation between Viburnum species (primary hosts) and sedges or related plants (secondary hosts). In North America, it has been collected from curled leaves of Viburnum lantana and V. opulus in New Brunswick, and from V. opulus var. roseum in Colorado. The species also occurs in Europe, where secondary hosts include Carex, Eriophorum, Luzula, and Typha; in North America, Cyperus virens is the only reported secondary host. Activity peaks in spring and autumn on primary hosts.
Ceruraphis viburnicola
Snowball Aphid
An aphid species found in spring and autumn on Viburnum hosts in North America. It induces curled leaf galls on primary hosts. The secondary hosts remained unrecorded as of 1960. The apterous viviparous female was first described in a 1960 Canadian Entomologist paper.
Eriosoma americanum
Woolly Elm Aphid
Eriosoma americanum, commonly known as the woolly elm aphid, is a North American aphid species that alternates between two host plants: American elm (Ulmus americana) and Saskatoon (Amelanchier alnifolia). The species produces distinctive woolly or cottony wax secretions that give it its common name. Heavy infestations on American elm cause leaf curling and produce visible dark patches and cottony masses. Like other aphids, it excretes honeydew while feeding on plant sap.
Prociphilus fraxinifolii
leafcurl ash aphid
Prociphilus fraxinifolii, commonly known as the leafcurl ash aphid, is a species of woolly aphid in the family Aphididae. It is a specialist feeder on ash (Fraxinus) species, causing characteristic leaf curl damage to host plants. Like other members of the genus Prociphilus, it produces dense white waxy secretions that give colonies a distinctive woolly appearance. The species has been documented in parts of Europe including Serbia, Bulgaria, Hungary, and Poland, with observations also recorded in North America.