Acrolepiopsis

Adults of Acrolepiopsis are small moths requiring examination of genitalia for definitive species identification. Male and female genitalia morphology provides primary diagnostic characters, with interspecific differences in these structures clearly illustrated in taxonomic revisions. DNA barcoding using mitochondrial cytochrome c oxidase I sequences shows average interspecific divergence of 8.1% versus intraspecific variation of ≤0.16%, providing molecular confirmation of species boundaries.

The genus occurs across the western Palaearctic region, Asia (including Korea, Japan, and Mongolia), and North America. Acrolepiopsis assectella has been introduced to eastern North America, with established populations in eastern Ontario, southwestern Quebec, Prince Edward Island, New York, and Vermont. A. sapporensis occurs in Hawaii as an introduced species but has not been recorded from continental North America. Bioclimate modeling predicts potential establishment in southeastern Canada, eastern United States, Pacific Northwest coastal regions, and interior southern British Columbia.

In temperate regions, species exhibit multiple generations annually depending on temperature. Acrolepiopsis assectella in eastern Ontario shows three distinct flight periods: spring (overwintered adults), early summer (first generation), and late summer (second generation). Development from egg to adult requires approximately 444.6 day-degrees above a threshold of 7°C, with a field cycle of 3–6 weeks. In warm summers, two generations may complete development; three generations are possible under favorable conditions.

Larvae are specialist feeders on Allium species (Liliaceae/Amaryllidaceae). Documented hosts include leek (Allium ampeloprasum var. porrum), onion (A. cepa), garlic (A. sativum), and chives (A. schoenoprasum). Oviposition preference and larval survival decline with increasing phylogenetic distance from preferred hosts. Females preferentially oviposit on larger biomass plants when host species options are equivalent.

• Allium ampeloprasum var. porrum - larval hostpreferred host, leek
• Allium cepa - larval hostonion
• Allium sativum - larval hostgarlic
• Allium schoenoprasum - larval hostchives

Development includes egg, larval, and pupal stages. At constant temperatures of 12–20°C, developmental times vary predictably with temperature. A linear degree-day model indicates a threshold temperature of 6°C with 630 degree-days required for complete development. Field populations in eastern Ontario complete egg-to-adult development in 3–6 weeks. Larvae feed internally or externally on Allium foliage. Pupation occurs in soil or plant debris. Adults overwinter, emerging in spring to initiate the seasonal cycle.

Females exhibit oviposition behavior influenced by host plant biomass, preferring larger plants when host species are equivalent. Trap cropping studies demonstrate that females distribute eggs differentially between trap crops and primary crops, with more eggs deposited on trap crops when these are available. This oviposition pattern has been validated in small-scale cage studies and medium-scale field trials.

Several species are significant agricultural pests causing up to 40% crop damage in Allium crops. Acrolepiopsis assectella is a recently established invasive species in eastern North America, particularly affecting organic producers in eastern Ontario and southern Quebec. Management strategies include reduced-risk foliar insecticides, row covers, trap cropping, and classical biological control using introduced parasitoids such as Diadromus pulchellus. Integrated pest management programs combine pesticide application, mechanical barriers, and biological control.

• AcrolepiaFormerly treated as congeneric; Acrolepiopsis was separated based on genitalic and other morphological differences
• PlutellaBoth are small moths with some species feeding on Brassicaceae and Allium respectively, but Plutella belongs to Plutellidae and differs in wing venation and genitalia structure

• agricultural pest
• Allium specialist
• invasive species
• integrated pest management
• degree-day model
• DNA barcoding
• classical biological control
• microlepidoptera

• BugGuide
• Wikipedia
• GBIF taxonomy match
• iNaturalist taxon
• NCBI Taxonomy
• Catalogue of Life
• Acrolepiopsis assectella . [Distribution map].
• Acrolepiopsis assectella . [Distribution map].
• Acrolepiopsis assectella . [Distribution map].
• Oviposition and feeding preference of Acrolepiopsis assectella Zell. (Lep., Acrolepiidae)
• Release and post-release monitoring ofDiadromus pulchellus, a pupal parasitoid of leek moth (Acrolepiopsis assectella)
• The parasitoid community associated with the invasive leek moth, Acrolepiopsis assectella (Zeller) (Lepidoptera: Acrolepiidae): can conservation biological control benefit an introduced classical biological control agent in North America?
• Modified Reproduction Strategy of Leek Allium porrum in Response to a Phytophagous Insect, Acrolepiopsis assectella
• Behavioural events and host constituents involved in oviposition in the leek moth Acrolepiopsis assectella
• Taxonomic review of the leek moth genusAcrolepiopsis(Lepidoptera: Acrolepiidae) in North America
• Actual and potential distribution ofAcrolepiopsis assectella(Lepidoptera: Acrolepiidae), an invasive alien pest ofAlliumspp. in Canada
• Behavioural events and host constituents involved in oviposition in the leek moth Acrolepiopsis assectella
• Trap cropping effect on oviposition behaviour of the leek moth Acrolepiopsis assectella and the diamondback moth Plutella xylostella
• Effect of temperature on development and activity periods of the leek moth Acrolepiopsis assectella Zell. (Lep., Acrolepiidae)
• Biology and development ofAcrolepiopsis assectella(Lepidoptera: Acrolepiidae) in eastern Ontario
• Identification of four secretory phospholipase A2s in a lepidopteran insect, Acrolepiopsis sapporensis, and their functional association with cellular immune responses
• Two new species of the genus Acrolepiopsis Gaedike, 1970 (Lepidoptera, Glyphipterigidae) from Korea.