Dasychira plagiata

The species can be distinguished from similar Dasychira species by its geographic distribution and host plant associations. Definitive identification requires examination of genitalia or reference to regional keys. The common name 'northern pine tussock' distinguishes it from the more southerly distributed Dasychira meridionalis (southern tussock moth).

Coniferous forests, particularly those dominated by spruce, fir, hemlock, pine, and larch species. Associated with boreal and northern temperate forest ecosystems.

North America: Newfoundland and Labrador west to Alberta, south to Massachusetts, New York, and North Carolina. Records from Manitoba and Vermont confirm presence in central and northeastern regions.

Adults on wing from June to August, with timing varying by location. Single generation per year inferred from flight period.

Larvae feed on coniferous trees: Picea glauca (white spruce), Picea mariana (black spruce), Picea rubens (red spruce), Abies balsamea (balsam fir), Abies fraseri (Fraser fir), Tsuga canadensis (eastern hemlock), and species of Pinus and Larix.

• Picea glauca - larval food plantwhite spruce
• Picea mariana - larval food plantblack spruce
• Picea rubens - larval food plantred spruce
• Abies balsamea - larval food plantbalsam fir
• Abies fraseri - larval food plantFraser fir
• Tsuga canadensis - larval food planteastern hemlock
• Pinus - larval food plantpine species
• Larix - larval food plantlarch species

Complete metamorphosis with egg, larval, pupal, and adult stages. Larvae are tussock moth caterpillars, presumably with characteristic hair tufts typical of the group. Pupation likely occurs in cocoons; adults emerge in summer.

Larval herbivore on coniferous trees. Population dynamics and ecological impacts have not been extensively documented; not known as a major outbreak species.

Minor forest pest potential given coniferous host range, though not documented as causing significant economic damage. May be encountered by foresters and naturalists in northern coniferous forests.

• Dasychira meridionalisSimilar common name (southern tussock moth) but occurs in more southern range; separation requires morphological examination
• Orgyia speciesOther tussock moths in same tribe Orgyiini; distinguished by wing pattern and male antennae structure

• BugGuide
• Wikipedia
• GBIF taxonomy match
• iNaturalist taxon
• NCBI Taxonomy
• Catalogue of Life
• Meloidae Holdings | Entomology Research Museum