Hellula rogatalis
Hulst, 1886
Cabbage Webworm, Cabbage Webworm Moth
, commonly known as the , is a small crambid to North America. The is a significant agricultural pest whose feed on Brassicaceae and related plants. are active from spring through fall, with multiple occurring annually in southern regions. The species was first described by George Duryea Hulst in 1886.
Pronunciation
How to pronounce Hellula rogatalis: //hɛˈluːlə roʊˈɡætəlɪs//
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Identification
Distinguished from similar crambid by the combination of yellowish with three wavy transverse and the characteristic subterminal line of equally spaced black dots. The small size (15–21 mm wingspan) and geographic range help separate it from related Hellula . are identified by their silken webbing on Brassicaceae plants and feeding damage concentrated on leaf and young leaves.
Images
Appearance
have a wingspan of 15–21 mm. are brownish to grayish yellow with wavy antemedial, , and postmedial . The subterminal line is marked by several equally spaced black dots. are light gray to grayish yellow with a dark line and pale fringe. are not described in available sources.
Habitat
Associated with agricultural and disturbed where Brassicaceae plants grow. require host plants for development; are found in fields, gardens, and areas with abundant cruciferous vegetation.
Distribution
to North America. In the United States, occurs from the southern states northward along the eastern seaboard to Maryland, New York, and Ontario, Canada. Also recorded from the Distrito Federal in Mexico.
Seasonality
are active from late March to October in southern regions and from June to October in northern portions of the range. Multiple occur per year in the south; generation number decreases northward.
Diet
feed on leaf and young leaves of Brassicaceae and related , including cabbage, turnip, beet, collard, cauliflower, kale, rutabaga, radish, kohlrabi, mustard, rape, horseradish, shepherd's purse (Capsella bursa-pastoris), and purslane (Portulaca oleracea). feeding habits are not documented.
Host Associations
- Brassica oleracea - larval cabbage, cauliflower, kale, collard
- Brassica rapa - larval turnip
- Brassica napus - larval rape, rutabaga
- Raphanus sativus - larval radish
- Armoracia rusticana - larval horseradish
- Capsella bursa-pastoris - larval shepherd's purse
- Portulaca oleracea - larval purslane
- Beta vulgaris - larval beet
Life Cycle
Multiple per year in southern range; fewer in north. stage not explicitly documented in sources. with , larval, pupal, and stages.
Behavior
construct silken webs on plants for shelter while feeding. Feeding is concentrated on leaf and young leaves, causing damage to growing points of plants.
Ecological Role
; acts as a primary consumer in agricultural . are tied to availability of Brassicaceae plants.
Human Relevance
Significant agricultural pest of Brassicaceae vegetable . Larval feeding damages leaf and young leaves, reducing crop yield and quality. Management is required in commercial vegetable production.
Similar Taxa
- Hellula hydralisRelated congeneric with overlapping use; distinguished by distribution and subtle pattern differences
- Hellula undalisRelated congeneric ; distinguished by distribution and pattern characteristics
More Details
Original Description
First described as Botys rogatalis by George Duryea Hulst in 1886, later transferred to Hellula