Populus-tremuloides
Guides
Agrilus horni
aspen root girdler
Agrilus horni, commonly known as the aspen root girdler, is a metallic wood-boring beetle in the family Buprestidae. The species is a specialist pest of aspen (Populus tremuloides), causing damage by girdling the roots and lower stems of suckers. It is morphologically similar to Agrilus anxius (bronze birch borer) and Agrilus liragus (bronze poplar borer) but can be distinguished by its distinctive root-girdling behavior. The species has been documented in North America from Arizona, South Dakota, Wisconsin, and Michigan.
Ectoedemia argyropeza
Virgin Pigmy
A Holarctic microlepidopteran in the family Nepticulidae, characterized by parthenogenetic reproduction with extremely rare males. Adults are active in late spring. Larvae are leaf miners on aspen species, producing distinctive mines that persist on host leaves. The species exhibits clonal population structure with limited dispersal capacity.
Enargia decolor
Pale Enargia, Aspen Twoleaf Tier Moth
A noctuid moth with boreal-transcontinental distribution across North America, primarily associated with trembling aspen and related poplar species. Adults are active in late summer, with larvae capable of reaching outbreak densities that cause extensive defoliation of host stands. The species shows a disjunct western distribution pattern that may represent cryptic diversity.
Oberea schaumii
Oberea schaumii is a cerambycid beetle that develops as larvae in trembling aspen (Populus tremuloides). The species has a variable life cycle duration: most individuals require three years to develop, though some complete development in two years and others require four. Adults emerge from late June through July. The beetle occurs in the crowns of large aspen trees and shows competitive interactions with Saperda inornata.
Saperda inornata
Poplar-gall Saperda
Saperda inornata is a longhorned beetle (Cerambycidae) native to North America, closely associated with trembling aspen (Populus tremuloides) throughout its life cycle. Larvae develop within living aspen trees, tunneling through wood and inner bark, while adults feed on bark and other tree tissues. The species was described by Thomas Say in 1824 and occurs across Canada and the United States. It has been observed in Manitoba, New Brunswick, Nova Scotia, and Ontario in Canada, as well as the northern United States.