Urban-forestry-pest
Guides
Aceria parulmi
Elm Finger Gall Mite
Aceria parulmi is an eriophyid mite species commonly known as the Elm Finger Gall Mite. It is a plant-parasitic mite that induces distinctive gall-like structures on elm leaves. Like other members of the genus Aceria, it has a worm-like, elongated body with four legs and is extremely small, typically less than 0.2 mm in length. The mite is specialized to feed on elm species (Ulmus), causing characteristic finger-shaped galls on leaf surfaces.
Agrilus anxius
bronze birch borer
Agrilus anxius, the bronze birch borer, is a wood-boring beetle in the family Buprestidae native to North America. It is a significant pest of birch trees (Betula spp.), with larvae tunneling through the cambial layer and frequently killing host trees. River birch (Betula nigra) shows the greatest resistance among native North American birches, while European and Asian birch species lack resistance entirely. The species is closely related to the emerald ash borer (Agrilus planipennis) and has been the subject of taxonomic confusion, with historical reports conflating birch-feeding and poplar-feeding populations that were later recognized as distinct species.
Callidiellum
Callidiellum is a genus of longhorn beetles (Cerambycidae) in the tribe Callidiini. The genus contains at least three described species, including the well-studied Callidiellum rufipenne, an invasive Asian cedar borer established in North America. Members of this genus are wood-borers specializing on living conifers in the family Cupressaceae.