Diamondback moth

Definition

A small, grayish-brown moth species (Plutella xylostella) in the family Plutellidae, named for the cream-colored, diamond-shaped band often visible along the folded forewings when at rest. A cosmopolitan agricultural pest whose larvae feed on cruciferous plants, causing significant damage to cabbage, broccoli, canola, and other Brassica crops worldwide.

Etymology

From the characteristic pale, diamond-shaped pattern formed by bands on the dorsal surface of the wings.

Example

Diamondback moth larvae mine into leaf tissue and feed on the mesophyll of cabbage leaves, creating window-pane damage; the species has evolved resistance to numerous insecticide classes, making integrated pest management essential in Brassica production.

Synonyms

• Cabbage moth
• Plutella xylostella

Related Terms

• Plutellidae
• Lepidoptera
• Agricultural pest
• Cruciferous crops
• Insecticide resistance
• Integrated Pest Management
• leaf miner

Usage Notes

Despite the common name "cabbage moth," this species is distinct from Mamestra brassicae, which is also called cabbage moth in some regions. The diamondback moth is considered the most economically important pest of Brassica crops globally. In taxonomic usage, Plutella xylostella (Linnaeus, 1758) is the accepted binomial; the genus Plutella contains approximately 40 species, but P. xylostella is by far the most widespread and damaging.