Exotic, but established
FWLFWL:
forewing length; the distance from the base of the forewing to the apex, including fringe
: 5.5-8.0 mm
Adults are yellowish brown to orange or red with a conspicuous, white, semitriangular costal patch. Males lack a forewing costal foldforewing costal fold:
a flap or fold at the base of the forewing that contains specialized sex scales
.
Male genitalia are characterized by a reduced uncusuncus:
a sclerotized process which is fused to the posterodorsal margin of tergum IX
and elongate valvavalva:
an appendage flanking the intromittent organ that is used to clasp the female during copulation
with an apical membranous lobe. Female genitalia are characterized by a small corpus bursaecorpus bursae:
a dilated membranous sac at the anterior end of the bursa copulatrix
with a single scobinatescobinate:
rasplike
signum.
The following account is summarized from Swatschek (1958)Swatschek (1958):
Swatschek, B. 1958. Die larval systematik der wickler (Tortricidae und Carposinidae) aus dem zoologischen Institut der Universitat Erlangen. Akademie-Verlag, Berlin. 269 pp. [Abhandlungen zur larvalsystematik Insekten 3.].
Last instar larvae are yellowish to pale green. The head is light brown to reddish brown with black posteriorposterior:
after, to the rear, toward anal end 
shading. The prothoracic shieldprothoracic shield:
a sclerotized plate on the dorsal surface of the prothorax 
is black or dark brown with black posterolateralposterolateral:
towards the rear and side; posterior and lateral 
margins. An anal combanal comb:
a toothed structure on the last abdominal segment used to eject frass away from the feeding larva; also termed "anal fork" 
is present.
Clepsis persicana (Fitch) and some aberrant individuals of Archips argyrospila (Walker) can appear similar to A. holmiana, but they can be easily distinguished by their larger size and presence of a forewing costal foldforewing costal fold:
a flap or fold at the base of the forewing that contains specialized sex scales in the male. The genitalia of all three species are distinct. Acleris holmiana has been collected in large numbers as a non-target during Epiphyas postvittana pheromone trap surveys conducted in Washington.
In North America, Acleris holmiana completes two, and possibly three, generations per year. Adults are present in May and again in June and July. Larvae create a shelter by webbing together two leaves at their margins. Pupation occurs in the larval shelter. Overwintering occurs in the egg stage.
This species is a minor pest of fruit trees (Rosaceae) in Europe. In addition to Rosaceae, it has been recorded feeding on Solanum rostratum Dunal (Solanaceae) in Washington.
| Host plant | Host plant family | Reference(s) |
| Crataegus sp. | Rosaceae | Meyrick MS 1938Meyrick MS 1938: Meyrick MS 1938. Unpublished manuscript by E. Meyrick at BMNH, data captured by Gaeden Robinson.; Bradley et al. 1973Bradley et al. 1973: Bradley, J. D., Tremewan, W. G., Smith, A. 1973. British Tortricoid Moths, Cochylidae and Tortricidae: Tortricinae. The Ray Society, London. 251 pp. |
| Cydonia sp. | Rosaceae | Bradley et al. 1973 |
| Malus domestica | Rosaceae | Lesne 1915Lesne 1915: Lesne, P. 1915. Les insectes nuisibles aux arbres fruitiers. J. Agric. Prat., Paris. Volume 28.; Sylven 1958Sylven 1958: Sylven, E. 1958. Studies on fruit leaf tortricids (Lepidoptera), with special reference to the periodicity of the adult moths. Statens Vaxtskyddsanstalt, Meddelanden [Swedish State Plant Protection Institute Contributions] 11: 74, pp. 135-296. Stockholm. |
| Malus sp. | Rosaceae | Benander 1965Benander 1965: Benander, P. 1965. Notes on the larvae of Swedish Micro-Lepidoptera. II. Opusc. Ent. 30: 1-23. |
| Malus sylvestris | Rosaceae | Bradley et al. 1973Bradley et al. 1973: Bradley, J. D., Tremewan, W. G., Smith, A. 1973. British Tortricoid Moths, Cochylidae and Tortricidae: Tortricinae. The Ray Society, London. 251 pp. |
| Prunus sp. | Rosaceae | Bradley et al. 1973Bradley et al. 1973: Bradley, J. D., Tremewan, W. G., Smith, A. 1973. British Tortricoid Moths, Cochylidae and Tortricidae: Tortricinae. The Ray Society, London. 251 pp. |
| Pyrus sp. | Rosaceae | Meyrick MS 1938Meyrick MS 1938: Meyrick MS 1938. Unpublished manuscript by E. Meyrick at BMNH, data captured by Gaeden Robinson.; Bradley et al. 1973Bradley et al. 1973: Bradley, J. D., Tremewan, W. G., Smith, A. 1973. British Tortricoid Moths, Cochylidae and Tortricidae: Tortricinae. The Ray Society, London. 251 pp. |
| Rosa sp. | Rosaceae | Disque 1908Disque 1908: Disque, H. 1908. Versuch einer microlepidopterologischen Botanik. Deutsch Entomologische Zeitschrift Iris. 21: 34-147.; Bradley et al. 1973Bradley et al. 1973: Bradley, J. D., Tremewan, W. G., Smith, A. 1973. British Tortricoid Moths, Cochylidae and Tortricidae: Tortricinae. The Ray Society, London. 251 pp. |
| Rubus sp. | Rosaceae | Bradley et al. 1973Bradley et al. 1973: Bradley, J. D., Tremewan, W. G., Smith, A. 1973. British Tortricoid Moths, Cochylidae and Tortricidae: Tortricinae. The Ray Society, London. 251 pp. |
| Sorbus aucuparia | Rosaceae | Benander 1965Benander 1965: Benander, P. 1965. Notes on the larvae of Swedish Micro-Lepidoptera. II. Opusc. Ent. 30: 1-23. |
| Solanum rostratum | Solanaceae | LaGasa database 2004LaGasa database 2004: LaGasa database. 2004. Food plant data base and personal communications with E. LaGasa, Washington State Department of Agriculture. |
View full screen host table here
A native of Europe and Asia Minor, Acleris holmiana was discovered in North America (British Columbia) in 1977. It was first detected in the U.S. (Washington) in 1994. It has apparently not spread outside of the Pacific Northwest.
