19 January 2015 Piceacecis (Diptera: Cecidomyiidae), a New Genus for a Non-Native Pest of Norway Spruce from Europe and its North American Relative
Raymond J. Gagné, Lorraine Graney
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Abstract

Dasineura abietiperda (Henschel), a European pest of Norway spruce, Picea abies (Pinaceae), is reported as new to northeastern North America where the tree is widely planted and valued as an ornamental. Adult gall midges emerge in early spring, mate and deposit eggs on twigs or new shoots. The larvae burrow into tissue causing swellings to form under bud scales and less frequently along shoots or near the terminal bud. Larvae overwinter in the galls. Field symptoms include bent twigs or shoots, swellings in nodes and needle drop. A new genus, Piceacecis Gagné is described to include D. abietiperda and its North American relative, Phytophaga tsugae (Felt), which occurs on native American white spruce, Picea glauca. Both cecidomyiids are redescribed with illustrations. The names of both are new combinations in Piceacecis, and Phytophaga piceae Felt is a new junior synonym of Piceacecis tsugae. In the past these synonyms have been combined also with Mayetiola.

Raymond J. Gagné and Lorraine Graney "Piceacecis (Diptera: Cecidomyiidae), a New Genus for a Non-Native Pest of Norway Spruce from Europe and its North American Relative," Proceedings of the Entomological Society of Washington 116(4), 378-393, (19 January 2015). https://doi.org/10.4289/0013-8797.116.4.378
Published: 19 January 2015
KEYWORDS
Lasiopteridi
new combinations
Picea, Holarctic
synonymy
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