FWL: 7.5-12.0 mm
This is possibly the most polymorphic tortricid, with over 100 named forms representing different phenotypes. Forewing patterns can be divided into those with longitudinal markings and those with transverse markings, although many forms show a combination of these two classes. According to Powell (1964), California individuals usually have uniform brown, black, or dull-red forewings with a gray basal band. Males lack a forewing costal fold.
Acleris hastiana can be confused with other species of Acleris due to its highly variable forewing pattern. Although it may be possible to diagnose A. hastiana using only wing pattern, a genitalic dissection should be used to confirm identity. Razowski (2002) illustrates differences in genitalia that can be used to separate A. hastiana from other similar European Acleris, such as A. abietana, A. aspersana, A. cristana, A. shepherdana and A. umbrana.
Late instar larvae are pale green or yellow with a brownish-yellow head and pale thoracic legs. The prothoracic shield is concolorous with the abdomen. In earlier instars, the head and prothoracic shield are black.
Acleris hastiana completes one or two generations. Adults are present in June and July and again in August through October. Overwintering occurs as a second generation adult.
Females deposit individual eggs on bark or branches in the spring (first generation) and on terminal shoots in the summer (second generation). First instar larvae bore into buds. Later intars feed within shelters constructed by webbing together terminal leaves. Pupation occurs in a flimy silken cocoon that is constructed in folded or webbed leaves or on the ground.
In North America, this species has been recorded feeding on blueberry (Vaccinium), bog rosemary (Andromeda), Ceanothus, huckleberry (Gaylussacia), oak (Quercus), Rhododendron, and willow (Salix).
|Family ||Genus/species ||Common name|
|Betulaceae ||Betula papyrifera Marsh. ||paper birch|
|Ericaceae ||Andromeda polifolia L. ||bog rosemary|
|Ericaceae ||Rhododendron L. ||rhododendron|
|Ericaceae ||Vaccinium L. ||blueberry|
|Fagaceae ||Quercus dumosa Nutt. ||coastal sage scrub oak|
|Myricaceae ||Myrica gale L. ||sweetgale|
|Rhamnaceae ||Ceanothus thyrsiflorus Eschsch. ||blueblossom|
|Rosaceae ||Prunus L. |
|Salicaceae ||Populus alba L. ||white poplar|
|Salicaceae ||Populus balsamifera L. ||balsam poplar|
|Salicaceae ||Populus tremuloides Michx. ||quaking aspen|
|Salicaceae ||Populus L. ||cottonwood|
|Salicaceae ||Salix aurita L. ||eared willow|
|Salicaceae ||Salix caprea L. ||goat willow|
|Salicaceae ||Salix cinerea L. ||large gray willow|
|Salicaceae ||Salix fragilis L. ||crack willow|
|Salicaceae ||Salix hookeriana Barratt ex Hook. ||dune willow|
|Salicaceae ||Salix laevigata Bebb ||red willow|
|Salicaceae ||Salix lasiolepis Benth. ||arroyo willow|
|Salicaceae ||Salix repens L. ||creeping willow|
|Salicaceae ||Salix scouleriana Barratt ex Hook. ||Scouler's willow|
|Salicaceae ||Salix sessilifolia Nutt. ||northwest sandbar willow|
|Salicaceae ||Salix sitchensis Sanson ex Bong. ||Sitka willow|
|Salicaceae ||Salix X sepulcralis Simonkai [alba X ?pendulina] ||weeping willow|
|Salicaceae ||Salix L. ||willow|
Acleris hastiana is Holarctic and is widely distributed across Europe and Asia to Japan and North Africa. In North America this species is distributed from the northeastern United States across southern Canada to British Columbia and south along the Pacific Coast to California.
Bradley, J. D., W. G. Tremewan and A. Smith. 1973. British Tortricoid Moths - Cochylidae and Tortricidae: Tortricinae. The Ray Society, London, England.
Obraztsov, N. S. 1963. Some North American moths of the genus Acleris. Proceedings of the United States National Museum. 114: 213-270.
Powell, J. A. 1964. Biological and taxonomic studies on tortricine moths, with reference to the species in California. University of California Publications in Entomology. Vol. 32. 317 pp.
Razowski, J. 2002. Tortricidae of Europe, Vol. 1, Tortricinae and Chlidanotinae. Frantisek Slamka, Slovakia. 247 pp.