Host associations and taxonomy of Nearctic conifer cone moths in the genus Eucosma (Lepidoptera: Tortricidae)

Powell, J

Host associations and taxonomy of Nearctic conifer cone moths in the genus Eucosma (Lepidoptera: Tortricidae)

Author

Jerry A. Powell

Author Affiliations

Jerry A. Powell was Lecturer in Entomology and Associate Entomologist in the Experiment Station, Berkeley.

Publication Information

Hilgardia 39(1):1-36. DOI:10.3733/hilg.v39n01p001. January 1968.

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Abstract

The genus Eucosma includes more than 150 described species in North America. Whereas larvae of most evidently are root and stem borers in plants such as woody Compositae, a small group of closely related species feeds in cones of coniferous trees. Diagnostic features, descriptions, host ranges, and geographical distributions for the ten members of this complex are given in the present paper. Four species are previously undescribed.

One species, Eucosma tocullionana Heinrich, in eastern North America, has been reared from various conifers—pine (Pinus), fir (Abies), spruce (Picea), and hemlock (Tsuga). Two other species, E. monitorana Heinrich and E. cocana Kearfott, of the eastern United States and Canada, are associated with pines. Of seven species that occur in western North America, three feed in pines and one in fir. Hosts are unknown for the remaining three.

Records in California indicate that specificity in host selection has resulted in isolation among populations on different conifer species. Thus, E. bobana Kearfott, which feeds on pinyon pines, is sympatric with E. ponderosa Powell in areas where Jeffrey pine occurs with the pinyons, while the latter moth is in turn broadly sympatric with the lodgepole pine-feeding E. rescissiorana Heinrich; yet each retains its identity in zones of overlap.

Eucosma siskiyouana (Kearfott) has formerly been confused with another tortricid, Barbara colfaxiana (Kearfott), Although both feed in fir cones as larvae, they are generically distinct moths.

Literature Cited

Barras S. J., Norris D. M. Eucosma species in red pine cones. Proc. Ent. Soc. Amer. No. Centr. Br. 1963. 18:61-62.

Barras S. J., Norris D. M. In vitro establishment and development of Eucosma sp. larvae from cones of Pinus resinosa on an artificial nutrient medium. Jour. Econ. Ent. 1965. 58:1033-34.

Butcher J. W., Hodson A. C. Biological and ecological studies on some Lepidopterous bud and shoot insects of jackpine (Lep., Olethreutidae). Canad. Ent. 1949. 81:161-73.

Critchfield W. B., Little E. L. Jr. Geographic distribution of the pines of the world. U. S. Dept. Agr. Forest Serv. Misc. Pub. 1966. 991:97 pp. DOI: 10.5962/bhl.title.66393 [CrossRef]

Drooz A. T. White pine shoot borer (Eucosma gloriola Heinrich). Jour. Econ. Ent. 1960. 53:248-51.

Grant J. Observations on a pine shoot moth, Eucosma sonomana Kft. (Lepidoptera: Olethreutidae). Proc. Ent. Soc. Brit. Columbia. 1958. 55:26-27.

Heinrich C. On some forest Lepidoptera, with descriptions of new species, larvae, and pupae. Proc. U. S. Natl. Mus. 1920. 57:53-96. DOI: 10.5479/si.00963801.57-2305.53 [CrossRef]

Heinrich C. Revision of the American moths of the subfamily Eucosminae of the Olethreutidae. U. S. Natl. Mus. Bul. 1923. 123:298 pp.

Kearfott W. D. New North American Tortricidae. Trans. Amer. Ent. Soc. 1907. 33:1-98.

Keen F. P. Insect enemies of western forests. U. S. Dept. Agr. Misc. Pub. 1952. 273:271 pp. DOI: 10.5962/bhl.title.65575 [CrossRef]

Keen F. P. Cone and seed insects of western forest trees. U. S. Dept. Agr. Tech. Bul. 1958. 1169:168 pp.

Kimball C. P. Arthropods of Florida and neighboring land areas Vol. 1. Lepidoptera of Florida. 1965. Gainesville: Florida Dept. Agr. Div. Plant Indus. 329p. pp. + 26 pl.

Little E. L. Jr. Common insects on pinyon pine (Pinus edulis). Jour. N. Y. Ent. Soc. 1943. 51:239-52.

Little E. L. Jr. Check list of native and naturalized trees of the United States. U. S. Dept. Agr. Forest Serv. Agr. Handbk. 1953. 41:472 pp.

Lyons L. A. Insects affecting seed production in red pine. III. Eucosma monitorana Heinrich, Laspreyresia toreuta Grote (Lepidoptera: Olethreutidae), Rubsaamenia sp. (Diptera: Cecidomyiidae), and other insects. Canad. Ent. 1957a. 89:150-64.

Lyons L. A. Insects affecting seed production in red pine. IV. Recognition and extent of damage to cones. Canad. Ent. 1957b. 89:264-71. DOI: 10.4039/Ent89264-6 [CrossRef]

MacKay M. R. Larvae of the North American Olethreutidae (Lepidoptera). Canad. Ent. Suppl. 1959. 10:338 pp. DOI: 10.4039/entm9110fv [CrossRef]

Ollieu M. M., Schenk J. A. The biology of Eucosma rescissiorana Heinrich in western white pine of Idaho (Lepidoptera: Olethreutidae). Canad. Ent. 1966. 98:268-74.

Powell J. A. Records and descriptions of some interesting species of Eucosma in California (Lepidoptera: Tortricidae). Proc. Biol. Soc. Wash. 1963. 76:235-46.

Powell J. A. Biological and taxonomic studies on Tortricine moths, with reference to the species in California. Univ. Calif. Pub. Ent. 1964. 32:318 pp.

Raizenne H. Forest Lepidoptera of southern Ontario and their parasites. 1952. Ottawa: Canad. Dept. Agr. Sci. Serv., Div. For. Biol. 277p. pp.

Ross D. A. A list of cone and seed insects of interior British Columbia. Proc. Ent. Soc. Brit. Columbia. 1958. 55:30-31.

Rydberg P. A. Flora of Colorado. Colo. Agr. College Exp. Sta. Bul. 1906. 100:xxii + 447 pp. DOI: 10.5962/bhl.title.57252 [CrossRef]

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