Cabbage semi looper

Thysanoplusia orichalcea

Cabbage semi looper

Thysanoplusia orichalcea

Cabbage semi looper

Thysanoplusia orichalcea

Thysanoplusia orichalcea (Slender Burnished Brass Moth) – Overview

Temperature & Humidity Preferences

• Thrives in warm temperatures (20-30°C).
• Prefers high humidity, especially in the evening.
• Most active in summer, with populations declining in colder months.

Nature of Damage

• Larvae cause damage by biting round holes in leaves.
• Feeding varies in size depending on larval development stage.

Identification

• Larvae: Plump, pale green, with three pairs of prolegs, often mixed with P. brassicae caterpillars.
• Adults: Light brown moths with a golden patch on each forewing, wingspan of 42 mm.
• Eggs: Laid on leaves; larvae pupate in plant debris.
• Moths are very active at dusk.

Life Cycle

• Egg incubation: ~4.2 days.
• Larval period: ~23.1 days.
• Pre-pupal period: ~1.4 days.
• Pupal period: ~9.5 days.
• Adult lifespan: ~7.45 days on S. tuberosum.
• Total life cycle: 41-51 days (average 45.65 days).