Olethreutes lacunana Denis Schiffermiiller Dark strawberry tortrix moth

This generally common, polyphagous species occurs mainly on herbaceous plants and is sometimes very damaging to strawberry crops grown under cloches. Other hosts include apple, field bean and raspberry.

BIOLOGY

The winter is passed as young hibernating larvae. These become active in early spring, sheltering in spun leaves and feeding avidly on foliage and flowers. They eventually pupate, and adults appear from May or June onwards. These adults lay eggs in pairs or in small groups on the leaves of host plants. These eggs hatch 2-3 weeks later. Larvae of the summer brood feed up to produce adults in August or September. In some situations this species completes just one generation in a year, overwintering in the pupal stage.

DESCRIPTION

Adult 15-18 mm wingspan; forewings whitish-ochreous to greyish-ochreous, marked with olive-green and brownish-black; hindwings brownish-grey (Fig. 296). Larva up to 14 mm long; body narrow and mainly dark: purplish-brown; pinacula blackish; head, prothoracic plate and anal plate blackish-brown; anal comb blackish, with five long teeth. Pupa 8-10 mm long, dark brown; cremaster bluntly tapered and with relatively long, hooked spines (Fig. 283d).

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