Hedya dimidioalba Retzius Marbled orchard tortrix moth

This polyphagous species attacks various trees and shrubs, especially Crataegus and other

Fig. 293 Male bramble shoot moth, Epiblema uddmanniana (x6).

Fig. 294 Bramble shoot webber, Epiblema uddmanniana (x5).

Fig. 294 Bramble shoot webber, Epiblema uddmanniana (x5).

Rosaceae. The larvae sometimes cause damage to the leaves and blossoms of orchard trees such as apple, cherry, pear and plum; they may also bore into the young shoots, causing the tips to wilt and die.

BIOLOGY

Adults occur in June and July. Eggs are deposited mainly on the underside of leaves of host plants and hatch in about 2 weeks. The larvae feed for a short time during the summer but then spin cocoons (e.g. in bark crevices) within which to overwinter. Activity is resumed in the spring. The larvae then attack the buds, blossom trusses and young leaves, often spinning leaves together with silk. Pupation takes place in late May or June, either within the larval habitation or between freshly spun leaves.

DESCRIPTION

Adult 15-21 mm wingspan; forewings ochre-ous-white, suffused with black, blue and grey markings (Fig. 295a). Larva up to 20 mm long; body olive-green to dark green; pinacula black; head, prothoracic plate, thoracic legs, anal plate and anal comb black or brownish-black.

Fig. 295 Forewings of Hedya: (a) marbled orchard tortrix moth, H. dimidioalba; (b) plum tortrix moth, H. pruniana (x6).
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