Mamestra

Mamestra

Classification

Pronunciation

How to pronounce Mamestra: /mæˈmɛstrə/

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Images

Summary

Mamestra brassicae, commonly known as the cabbage moth, is a widespread pest within the family Noctuidae. Its larvae are known for causing substantial damage to a variety of crops, especially brassicas, making it a significant agricultural pest across its distribution range.

Physical Characteristics

Forewing grey-brown varied with fuscous; lines pale, dark-edged; orbicular stigma rounded, reniform large, white-spotted or filled in with white; hindwing brownish, with a paler mark near end of vein 2. Variants include blackish forms and pale grey-brown forms with markings either pronounced or obscured.

Identification Tips

Adults have a wingspan ranging between 34–50 mm with characteristic kidney shaped spot enclosed in a white border on forewing. Dorsal spurs located on the tibia of the forelegs help distinguish this species.

Habitat

Widely distributed in the Palearctic region, including parts of Europe, Asia, and North Africa, often found in agricultural settings due to its host plants.

Distribution

The cabbage moth is found across parts of Europe and Asia, spanning latitudes from about 30°N to 70°N within the Palearctic region.

Diet

Caterpillars are polyphagous, feeding on many plants, particularly crops in the genus Brassica including cabbage, broccoli, and Brussels sprouts, as well as tobacco, sunflower, and tomato.

Life Cycle

Life history varies by population; may produce two to three generations in a year in some areas, while others have one generation. Development from egg to adult can depend on environmental factors.

Reproduction

Females lay around 2500 eggs in clusters; prefer oviposition on cabbage plants, laying eggs from May to June with an incubation period of 6 to 12 days depending on temperature.

Ecosystem Role

As a pest species, it plays a role in agriculture-related ecosystems significantly affecting crop production.

Economic Impact

Significantly damaging to crops, particularly cabbage and related vegetables, leading to economic losses in agriculture due to damage and infection spread.

Collecting Methods

  • Light traps
  • Visual inspections on host plants

Preservation Methods

  • Pinning
  • Freezing
  • Ethanol preservation

Similar Taxa

Misconceptions

Common name 'cabbage moth' suggests a focus on cabbage, but it feeds on a wide variety of other plants.

Tags

  • moth
  • pest
  • agriculture
  • Lepidoptera
  • Noctuidae