Diamondback moth, Plutella xylostella

Departments - Under the Microscope

These microscopic worms can cause trouble for ornamental growers.

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February 7, 2019

The diamondback moth’s caterpillar larvae chew small circular holes in leaves from the undersides, giving the leaves a shot-hole appearance. Very high populations can defoliate plants. Affected flowers include perennials like candytuft and wallflower, as well as annuals like sweet alyssum and other plants in the cruciferous family. It is a particularly avid attacker of cruciferous vegetable crops, like cabbage and broccoli.

Source: University of California Agriculture & Natural Resources IPM department, University of Florida Entomology Department