Trichordestra lilacina
(Harvey, 1874)
Aster Cutworm
Trichordestra lilacina, commonly known as the aster , is a noctuid native to North America. The refers to its larval stage, which functions as a cutworm—feeding on plants at or below soil level. are and belong to the diverse dart moth group within Noctuidae. The species has been documented across Canada and the northern United States.
Pronunciation
How to pronounce Trichordestra lilacina: /trɪˌkɔːrˈdɛstrə laɪˈlæsɪnə/
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Identification
As a member of the Trichordestra, this can be distinguished from similar cutworm moths by specific wing pattern and coloration characteristics, though precise diagnostic features require examination. The specific epithet 'lilacina' suggests a lilac or pale purple coloration in some life stage. Differentiation from such as Trichordestra legitima (the striped garden caterpillar moth) relies on subtle morphological differences in forewing markings and genitalia.
Images
Distribution
Recorded from North America, with confirmed presence in the Canadian provinces of Alberta, Manitoba, and Saskatchewan, and the U.S. state of Vermont. The distribution likely extends more broadly across northern North America based on the range, though specific records are sparse.
Diet
The 'aster ' indicates larval feeding on Asteraceae, though specific plant associations have not been comprehensively documented. Larvae exhibit typical cutworm , consuming plant stems at or near ground level.
Host Associations
- Asteraceae - larval food plantimplied by , specific unknown
Behavior
Larvae are feeders that hide in soil or debris during daylight hours, emerging at night to feed—consistent with . are presumably nocturnal and attracted to light.
Ecological Role
Larvae function as herbivores, potentially impacting native and ornamental Asteraceae . As a prey , they contribute to supporting birds, , and other .
Human Relevance
May occasionally damage garden asters and related ornamental plants; otherwise has minimal documented economic impact.
Similar Taxa
- Trichordestra legitimaOverlapping distribution and similar larval habits; distinguished by forewing pattern and genitalia
- Other Noctua/Hadena group cutwormsShared larval ; requires dissection or detailed wing examination for reliable identification
More Details
Taxonomic history
Described by Harvey in 1874. The Trichordestra was historically placed within Hadenini, though tribal classifications within Noctuinae remain under revision.
Observation data
iNaturalist records indicate at least 147 observations, suggesting the is encountered with moderate frequency by naturalists, though it is not among the most commonly reported noctuids.