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Cydalima perspectalis

Boxwood pyralid

Description

This moth was first reported in Europe in 2007 and now is spreading in several directions. It was probably introduced from East Asia. It overwinters as young larvae in webs between leaves or in crevices nearby. The adults are shiny white. The characteristic larvae, up to 5 cm long, feed on boxwood leaves and even on the green bark of shoots. They cover the plant with silk webs, and cause significant defoliation. The pupa is hidden in a case consisting of several leaves spun together. The first flight is in spring is in April/ May. 2–3 generations may follow. Attacked plants turn beige because the pitted leaves shrivel. If the attack is light, the plant recovers by sprouting new leaves. With high infestations, the larvae can defoliate almost entire plants and thus usually kill them in parks and gardens.

Symptom

Green caterpillars on leaves. Brown, eaten leaves.

Tree Species: Boxwood

Part of a plant- attacked: Leaf / Needle

Pest significance: Very harmful

Pest Category: Insects

Invasive Species: Yes

Present in EU: Yes

Seasonal frequency of occurrence

Seasonal frequency of occurrence