Flax notcher moth

Last updated: 24 September 2026
Flax notcher moth Christopher Stephens some rights reserved CC BY SA
Photo taken by Christopher Stephens, some rights reserved (CC-BY-SA). Cropped for website

Description

Flax notcher moths are brown in colour with a wingspan of about 40 millimetres. Caterpillars are brown-yellow and feed at night on young flax leaves.

Common native plant hosts

Scientific names Māori/common names
Phormium tenax, Phormium cookianum Flax, harakeke, wharariki, kōrari, swamp flax, mountain flax
Scientific names
Phormium tenax, Phormium cookianum
Māori/common names
Flax, harakeke, wharariki, kōrari, swamp flax, mountain flax

Symptoms and damage

Feeding damage appears in the form of notches along the leaf edge. Damage is more aesthetic and doesn’t cause the death of plants.

Prevention and control tips

  • Bacillus thuringiensis.
  • Insecticides for caterpillars with additional sticking agent.

Image details

Photo by Christopher Stephens - some rights reserved (CC-BY-SA)