Zeiraphera improbana

(Walker, 1863)

larch needleworm moth, Larch Needleworm

Zeiraphera improbana is a small tortricid native to North America, commonly known as the larch needleworm moth. The has a wingspan of approximately 19 mm. Its larvae are specialized feeders on Larix species, particularly tamarack (Larix laricina). The species is subject to by multiple hymenopteran including braconid, ichneumonid, and chalcid wasps.

Zeiraphera improbana by Jeremy deWaard, University of British Columbia. Used under a CC BY 3.0 license.Zeiraphera improbana damage by Scott Tunnock, USDA Forest Service, United States. Used under a CC BY-SA 3.0 license.

Pronunciation

How to pronounce Zeiraphera improbana: /ˌzaɪrəˈfɪərə ɪmˈproʊbænə/

These audio files are automatically generated. While they are not always 100% accurate, they are a good starting point.

Identification

Distinguished from similar Zeiraphera by association with Larix plants and geographic distribution in North America. Specific diagnostic morphological features not documented in available sources.

Images

Habitat

Associated with larch forests; larvae found on tamarack (Larix laricina). Specific requirements for not documented.

Distribution

North America; documented in Ontario, Canada. Full range extent not comprehensively documented.

Seasonality

Activity periods not explicitly documented in available sources.

Diet

Larvae feed on Larix , specifically tamarack (Larix laricina). feeding habits not documented.

Host Associations

  • Larix laricina - larval foodplanttamarack; primary documented in Ontario study
  • Larix - larval foodplant-level association per Wikipedia source

Life Cycle

stages described in published study. Specific developmental timing and number of per year not documented in available sources.

Behavior

Larval feeding on larch needles documented. behavior patterns not described in available sources.

Ecological Role

Herbivore on Larix . Serves as for including one braconid, one ichneumonid, and three chalcid species.

Human Relevance

Potential forest pest due to larval feeding on larch needles; specific economic or ecological impact not quantified in available sources.

Similar Taxa

  • Zeiraphera griseanaLarch budmoth with similar association (Larix); distinguished by Eurasian distribution and documented mass not observed in Z. improbana
  • Other Zeiraphera species contains multiple larch-feeding ; specific diagnostic features for Z. improbana not documented in available sources

More Details

Taxonomic note

Originally described as Sciaphila improbana by Walker in 1863; later transferred to Zeiraphera.

Parasitoid complex

Five documented from Ontario : one Braconidae, one Ichneumonidae, and three Chalcidae.

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Sources and further reading