Spoladea

Genus-level identification requires examination of wing pattern and genitalia; S. recurvalis can be distinguished by forewing pattern with a distinct whitish band curving from costa to dorsum, creating a characteristic 'recurved' appearance referenced in the specific epithet. Larvae produce webbing on host foliage. S. mimetica is restricted to the Neotropics and differs in genital morphology.

Associated with cultivated and wild Amaranthus species in agricultural and disturbed habitats; occurs in tropical and subtropical lowlands where host plants are available.

Pantropical and subtropical distribution with extension into temperate regions; S. recurvalis documented across Africa, Asia, Australasia, Pacific Islands, North America (southeastern USA), Central America, Caribbean, and South America. Recently expanding in Europe with records from Italy and other Mediterranean countries.

Larvae feed on foliage of Amaranthus species (primary host), with additional records from spinach (Spinacia oleracea) and sugar beet (Beta vulgaris). Adults require nectar feeding for survival and sustained flight activity.

• Amaranthus - primary host plantMain host for larval development; multiple accessions show varying resistance levels
• Spinacia oleracea - host plantSpinach; significant agricultural pest
• Beta vulgaris - host plantSugar beet; 'beet webworm' common name origin

Complete metamorphosis with egg, larval, pupal, and adult stages. Female S. recurvalis have a 3-day pre-oviposition period and continue egg-laying for up to 20 days post-emergence. Larval development occurs within webbed foliage on host plants.

Adult females exhibit highest flight activity during the pre-oviposition period. Flight performance is temperature-dependent with optimal range of 17–23°C; approximately 10% of females capable of sustained long-duration flight at 12°C. Adult feeding on nectar is essential for survival—deprivation of honey solution for even one day significantly depresses subsequent flight activity.

Herbivore and agricultural pest; serves as host for larval endoparasitoid Apanteles hemara, which is the dominant natural enemy in African and Asian populations and has been studied for augmentative biological control.

Major pest of leafy vegetables and root crops in tropics and subtropics; causes complete foliage loss under severe outbreaks. Subject of transcriptome sequencing for development of novel pest management strategies including pheromone-based control. Expanding distribution in Europe monitored through citizen science platforms.

• HymeniaFormerly included S. recurvalis as Hymenia recurvalis; distinguished by genitalic and wing venation characters placing Spoladea in Spilomelinae
• Other Crambidae webwormsLarval webbing behavior shared with many Spilomelinae; identification requires adult genital dissection and wing pattern analysis

• agricultural pest
• amaranth pest
• biological control
• transcriptome
• pheromone
• flight behavior
• expanding range
• citizen science

• BugGuide
• Wikipedia
• GBIF taxonomy match
• iNaturalist taxon
• NCBI Taxonomy
• Catalogue of Life
• Spoladea recurvalis . [Distribution map].
• Transcriptome analysis in the beet webworm, Spoladea recurvalis (Lepidoptera: Crambidae)
• Flight activity, reproduction, and adult nutrition of the beet webworm, Spoladea recurvalis (Lepidoptera: Pyralidae)
• THE BEETROOT MOTH SPOLADEA RECURVALIS (FABRICIUS, 1775) (LEPIDOPTERA CRAMBIDAE) EXPANDS ITS SPREAD IN ITALY: NEW RECORDS WITH FIRST OCCURRENCE IN SOME REGIONS
• Effects of Host Age and Density on the Performance of Apanteles hemara (Hymenoptera: Braconidae), a Larval Endoparasitoid of Spoladea recurvalis (Lepidoptera: Crambidae)
• Beet webworm, Spoladea recurvalis Fabricius (Lepidoptera: Crambidae) new to the Adrar region (south-west of Algeria) with comments on host plants and morphometry
• Temperature-dependent development, survival and reproduction ofApanteles hemara(Nixon) (Hymenoptera: Braconidae) onSpoladea recurvalis(F.) (Lepidoptera: Crambidae)
• Sex-specific spatial and temporal gene expressions of Pheromone biosynthesis activating neuropeptide (PBAN) and binding proteins (PBP/OBP) in Spoladea recurvalis
• Expression of Resistance in Amaranthus spp. (Caryophyllales: Amaranthaceae): Effects of Selected Accessions on the Behaviour and Biology of the Amaranth Leaf-Webber, Spoladea recurvalis (Lepidoptera: Crambidae)
• The Effects of Pest-Resistant Amaranth Accessions on the Performance of the Solitary EndoparasitoidApanteles hemara(Hymenoptera: Braconidae) Against the Amaranth Leaf-WebberSpoladea recurvalis(Lepidoptera: Crambidae)
• Temperature dependent immunological responses of Spoladea recurvalis exposed to entomopathogenic fungi.