Ash
Guides
Agrilus subcinctus
Native Ash Borer
Agrilus subcinctus, commonly known as the native ash borer, is a North American jewel beetle (Buprestidae) that develops in ash (Fraxinus) trees. Unlike the invasive emerald ash borer (A. planipennis), this species is restricted to dead ash twigs for larval development. Adults are active from late May through mid-August, with peak flight in June. The species serves as host for multiple hymenopteran parasitoids and has been studied for its distinct mating behavior, which involves visual aerial orientation followed by contact chemical signal evaluation.
Dasineura pellex
ash bullet gall midge
Dasineura pellex, commonly known as the ash bullet gall midge, is a species of gall midge in the family Cecidomyiidae. The species induces distinctive bullet-shaped galls on ash trees (Fraxinus spp.). Like other members of the genus Dasineura, it is a specialist herbivore with a close association to its host plant. The species has been documented across parts of North America, with records from the northeastern United States including Vermont.
Dasineura tumidosae
Ash Petiole Gall Midge
Dasineura tumidosae is a gall midge in the family Cecidomyiidae that induces galls on ash trees (Fraxinus spp.). The species is known primarily from its association with ash petioles, where larvae develop within characteristic swellings. Like other Dasineura species, it has a narrow host range tied to specific plant tissues. The midge has been recorded from the northeastern United States, particularly Vermont.
Eupareophora
spiny ash sawflies
Eupareophora is a genus of sawflies in the family Tenthredinidae, subfamily Blennocampinae. The genus contains at least two species: the West Palaearctic E. exarmata and the Nearctic E. parca. Both species are associated with ash trees (Fraxinus spp.) as hosts. Larvae are characterized by prominent spines and can cause significant defoliation. E. parca has shown rapid population increases in urban settings, suggesting potential as an urban pest.
Hylesinus
crenulate bark beetles
Hylesinus is a genus of bark beetles in the family Curculionidae comprising more than 180 described species. Members are commonly known as crenulate bark beetles and are primarily associated with woody plants, particularly ash (Fraxinus) and pistachio (Pistacia). Several species have been studied as pests of economic or ornamental importance.
Hylesinus aculeatus
eastern ash bark beetle
Hylesinus aculeatus, commonly known as the eastern ash bark beetle, is a species of bark beetle in the family Curculionidae. It is one of approximately 20 species in the genus Hylesinus, which are primarily associated with ash trees (Fraxinus spp.). The species is native to North America and has been documented across a broad geographic range from Canada through the United States. Like other bark beetles in this genus, it is likely a phloem feeder that develops under the bark of host trees, though specific biological details remain poorly documented in published literature.
Lambdina fervidaria
curve-lined looper, spring hemlock looper, curved-lined looper moth
Lambdina fervidaria is a geometrid moth found in eastern North America. Adults have a wingspan of approximately 27 mm and are active from May to August. The species has two recognized subspecies with slightly different host plant preferences. Larvae feed on hardwood trees including oaks and ashes, while the subspecies L. f. athasaria specializes on conifers such as balsam fir, spruce, and eastern hemlock.
Leptoypha minor
Arizona ash lace bug, ash lace bug
Leptoypha minor, commonly known as the Arizona ash lace bug, is a species of lace bug in the family Tingidae. It is a documented pest of ash trees (Fraxinus spp.), causing damage to twigs and foliage. The species is particularly abundant in California and has been economically significant as an ornamental pest since its formal description in 1942.
Lignyodes
Ash Seed Weevils
Lignyodes is a genus of weevils in the family Curculionidae, commonly known as ash seed weevils. The genus contains more than 30 described species. Members of this genus are associated with ash trees (Fraxinus spp., Oleaceae) as host plants. The genus was established by Dejean in 1835.
Papaipema furcata
Ash Shoot Borer Moth, ash tip borer
Papaipema furcata is a noctuid moth whose larvae bore into the twigs of ash trees (Fraxinus spp.) and box elder (Acer negundo). Adults are active from late summer through autumn, with a wingspan of 33–49 mm. The species ranges across eastern and central North America from Quebec to Georgia and west to Louisiana and Manitoba.
Prays fraxinella
Ash Bud Moth
Prays fraxinella, the ash bud moth, is a European moth in the family Praydidae. Larvae are leaf miners that feed on ash tree foliage and buds. The species exhibits two color forms: a typical white and black pattern, and a melanic form formerly called f.rustica, which has been reclassified as a separate species, Prays ruficeps. Adults are active in two generations per year, with flight periods in late spring and again in mid-summer.
Tethida barda
Black-headed Ash Sawfly
Tethida barda is a sawfly species in the family Tenthredinidae, commonly known as the Black-headed Ash Sawfly. The species is associated with ash trees (Fraxinus species) as a host plant. It is found across eastern and central Canada and the northeastern United States. The larvae feed on ash foliage and can occasionally cause noticeable defoliation.
Tropidosteptes
ash plant bugs
Tropidosteptes is a genus of plant bugs (Miridae) containing at least 30 described species. The genus is best known from T. chapingoensis, the ash plant bug, which has been studied in detail for its life cycle and impact on urban ash trees. Species in this genus are associated with Fraxinus (ash) trees and can cause significant defoliation damage. The genus occurs in North America, with at least one species introduced to South America.