Old World Webworm
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Old World Webworm
hellula undalis
The Old World Webworm (Hellula undalis), also widely known as the cabbage webworm, is a small moth belonging to the family Crambidae. Though the adults are modest and easily overlooked, their larvae are notorious in agricultural circles as highly specialized herbivores with a strong preference for plants in the brassica family, such as cabbage, broccoli, and radishes. This species is highly adaptable and thrives in warm, temperate, and tropical climates across Europe, Asia, Africa, and Australia. What makes the Old World Webworm fascinating is the larval survival strategy. They construct intricate silk webs over their feeding zones, which act as a protective fortress shielding them from environmental hazards, predators, and even chemical controls, making them remarkably resilient in their habitats.
Hábitat: Found in agricultural fields, vegetable gardens, and cultivated croplands where cruciferous plants are grown.
Aspecto
The adult Old World Webworm is a small moth with a wingspan of 1 to 2 centimeters. Its forewings are mottled grayish-brown, decorated with distinctive wavy, undulating pale-brown and dark-brown bands, while the hindwings are a uniform pale grayish-white. In its larval stage, the caterpillar is easily recognized by its creamy-yellow body adorned with five prominent, dark-brown longitudinal stripes and a shiny blackish-brown head capsule.
ReinoAnimaliaFiloArthropodaClaseInsectaOrdenLepidopteraFamiliaCrambidaeGéneroHellula
Categoría
InsectosRareza
Common
Peligro
1/5 · Muy bajo
Snaps
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Datos interesantes
Adult moths are strictly nocturnal and are highly attracted to artificial light sources, making them easy to spot around outdoor lamps at night.
The Old World Webworm caterpillars can ruin an entire cabbage harvest by eating the central growing tip, which prevents the cabbage head from forming.
Their silk webbing acts like a raincoat, shedding water droplets to keep the larvae dry during heavy downpours.
Habilidades especiales
Habilidad
Silken Fortress
Larvae spin dense silk webs over their feeding sites, protecting themselves from predators, rain, and desiccation.
Habilidad
Apical Boring
Caterpillars can bore deep into the growth buds and stems of host plants, effectively hiding from external chemical treatments.
Habilidad
Rapid Development
In warm climates, this species can complete its entire lifecycle in under a month, allowing it to produce multiple generations in a single season.
Medidas y detalles
- Longitud
- 1-2 cm
- Envergadura
- 1-2 cm
- Top Speed
- 5 km/h
- Tamaño de la puesta
- 40-150
- Incubación
- 3-7 días
Dieta y alimentación
The larvae feed primarily on the leaves, buds, and stems of cruciferous plants, while adults feed on flower nectar.
Diferencias por edad: Caterpillars feed strictly on plant tissues, while the adult moths feed on flower nectar.
Alimentos principales
- Cabbage (Brassica oleracea)
- Radish (Raphanus sativus)
- Mustard greens (Brassica juncea)
- Canola (Brassica napus)
Método de búsqueda
- Grazing
Conexiones ecológicas
host plant
Cabbage
Brassica oleracea
The caterpillar feeds heavily on cabbage leaves, often destroying the apical bud of the plant.
parasite
Braconid Wasp
Bracon hebetor
This parasitoid wasp attacks the larvae of the webworm, laying eggs inside them to develop.
eaten by
Paper Wasp
Polistes humilis
A common predatory wasp that feeds on cabbage webworm caterpillars in garden ecosystems.
Rasgos
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También conocido como
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Seguridad
Peligro
1/5 · Muy bajo
Todavía no hay notas especiales de seguridad.
Preguntas frecuentes
¿Cómo identificar a Old World Webworm?
La forma más fácil de identificar a Old World Webworm es usar la aplicación de identificación de naturaleza Snappit.
¿Cuál es el longitud de Old World Webworm?
1-2 cm
¿Cuál es el envergadura de Old World Webworm?
1-2 cm
¿Cuál es el top Speed de Old World Webworm?
5 km/h
¿Qué come Old World Webworm?
The larvae feed primarily on the leaves, buds, and stems of cruciferous plants, while adults feed on flower nectar.
¿Dónde se encuentra normalmente Old World Webworm?
Found in agricultural fields, vegetable gardens, and cultivated croplands where cruciferous plants are grown.
¿Cómo caza Old World Webworm?
Grazing
¿Cuál es el tamaño de la puesta de Old World Webworm?
40-150
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