Old World Webworm
探検昆虫
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.
生息地: Found in agricultural fields, vegetable gardens, and cultivated croplands where cruciferous plants are grown.
外見
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.
界Animalia門Arthropoda綱Insecta目Lepidoptera科Crambidae属Hellula
カテゴリ
昆虫レア度
Common
危険度
1/5 · 非常に低い
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おもしろい事実
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.
特殊能力
能力
Silken Fortress
Larvae spin dense silk webs over their feeding sites, protecting themselves from predators, rain, and desiccation.
能力
Apical Boring
Caterpillars can bore deep into the growth buds and stems of host plants, effectively hiding from external chemical treatments.
能力
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.
サイズと詳細
- 長さ
- 1-2 cm
- 翼開長
- 1-2 cm
- Top Speed
- 5 km/h
- 一度の産卵数
- 40-150
- 抱卵期間
- 3-7 日
食性と食事
The larvae feed primarily on the leaves, buds, and stems of cruciferous plants, while adults feed on flower nectar.
年齢による違い: Caterpillars feed strictly on plant tissues, while the adult moths feed on flower nectar.
主な食物
- Cabbage (Brassica oleracea)
- Radish (Raphanus sativus)
- Mustard greens (Brassica juncea)
- Canola (Brassica napus)
採餌方法
- Grazing
生態系とのつながり
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.
特徴
このオブジェクトにはまだ特徴バッジが割り当てられていません。
別名
まだ別名はありません。
コレクション
テーマが追加されると、このオブジェクトのコレクションがここに表示されます。
安全性
危険度
1/5 · 非常に低い
まだ特別な安全上の注意はありません。
よくある質問
Old World Webwormを見分けるには？
Old World Webwormを識別する最も簡単な方法は、Snappit自然識別アプリを使用することです。
Old World Webwormの長さは何ですか？
1-2 cm
Old World Webwormの翼開長は何ですか？
1-2 cm
Old World Webwormのtop Speedは何ですか？
5 km/h
Old World Webwormは何を食べますか？
The larvae feed primarily on the leaves, buds, and stems of cruciferous plants, while adults feed on flower nectar.
Old World Webwormは通常どこに生息していますか？
Found in agricultural fields, vegetable gardens, and cultivated croplands where cruciferous plants are grown.
Old World Webwormはどのように狩りをしますか？
Grazing
Old World Webwormの一度の産卵数は何ですか？
40-150
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