Leek moth

Acrolepiopsis assectella

Larval mining and feeding within foliage and bulbs occurs, which is often followed by extensive rotting. Hidden damage leading to loss during storage is a serious problem.
Leek moth larvae and pupae are often hidden within Allium tops, near new growth at the crown. They can be shaken from the plant by beating the tops on an edge of a box or table, while holding the plants at the bases near the roots. Visual inspection for larval damage is most effective for plants with very small tops.
Caterpillars and pupae are typically light to bright green in color. The half inch long pupal cocoon has a distinctive pattern of woven fibers that resembles cargo netting, with the green pupa visible through the white cocoon fibers.

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