Acleris comariana Lienig Zeller Strawberry tortrix moth

Fig. 282 Strawberry tortrix moth, Acleris comariana (x6).

This species is a locally common pest of strawberry, especially in fenland areas. The larvae, when numerous, cause considerable defoliation. They sometimes also attack the developing fruit, causing malformation.

BIOLOGY

Unlike other strawberry-infesting tortricids, this species overwinters in the egg stage. The eggs hatch in spring and the larvae feed in folded leaves from April onwards, sometimes webbing the foliage to adjacent blossoms. Fully fed larvae pupate in June, and adults occur from mid-June to July. Their eggs hatch in approximately 2 weeks, and the larvae feed rapidly to pupate by the autumn. A second flight of adults occurs from September to late October or early November; these moths deposit the winter eggs on the leaves of strawberry plants.

DESCRIPTION

Adult 13-18 mm wingspan; forewings extremely variable, but often brown with a prominent red or blackish costal blotch; hindwings grey (Fig. 282). Egg 0.8 x 0.6mm, flat, pale yellow to reddish. Larva up to 15 mm long; body green, darker dorsally; pinacula brown; head yellowish-brown; prothoracic plate yellowish-brown with a dark hind margin; anal plate green. Young larva whitish to brownish; head brown or black. Pupa 6.0-7.5 mm long, light brown;

cremaster broad and short, with short lateral horns (Fig. 283a).

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