About Diamondback Moth
The diamondback moth (Plutella xylostella) is a 6 mm moth with a 15 mm wingspan that is arguably the most economically damaging pest of cruciferous vegetables globally, costing over $5 billion annually in control and losses. Larvae feed on cabbage, broccoli, cauliflower, and canola, creating shot-hole damage in leaves and reducing marketability. It was the first insect documented to evolve resistance to DDT (in the 1950s) and has since developed resistance to virtually all insecticide classes including Bt toxins. Crop rotation, pheromone trap monitoring, and biological control with parasitic wasps are the most sustainable management tools.
Geographic Distribution
This insect is found across Oceania, with notable populations in Fiji and surrounding regions.
Management
If you suspect a Diamondback Moth problem, consult our recommended exterminator services or browse our full pest species database for related species and control guidance.