Glypta fumiferanae

(Viereck, 1912)

Glypta fumiferanae is an ichneumonid that parasitizes spruce budworm larvae (Choristoneura fumiferana and C. occidentalis). As an endoparasitoid, females deposit inside larvae, and developing wasp offspring consume the host from within. This is a significant natural enemy of spruce budworm, a major defoliator of coniferous forests in North America. females are synovigenic and require feeding (honey) for extended longevity and high ; unfed adults survive only 2–5 days and produce far fewer eggs.

1956. Hymenoptera. Ichneumonidae. Glypta fumiferanae (Vier.) Adult of this important western spruce budworm parasite ovipositing in body of hibernating spruce budworm larva concealed within twig scar. Baker, OR. (34009644274) by R6, State & Private Forestry, Forest Health Protection. Used under a Public domain license.

Pronunciation

How to pronounce Glypta fumiferanae: /ɡlɪp.ta fjuː.mɪ.fɛˈɹeɪni/

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Habitat

Coniferous forests, particularly spruce-fir stands where spruce budworm larvae occur. are found on foliage during periods.

Distribution

North America: documented from British Columbia, northern New Brunswick, and other regions with spruce budworm . GBIF records include Cypress Hills, Elkwater, Beausejour, Glenlea, and Spruce Woods Forest Reserve in Canada.

Seasonality

and activity coincide with spruce budworm larval development; temporal activity patterns influence rates.

Diet

feed on honeydew or other sources; larvae consume tissues from within spruce budworm larvae.

Host Associations

Life Cycle

Females oviposit directly into spruce budworm larvae. Development occurs internally; cocoons are found on foliage during . Detection of possible in 4th and 5th instar larvae using electrophoretic techniques (diagnostic bands: aconitase, esterase, leucine aminopeptidase, 6-phosphoglucose dehydrogenase).

Behavior

Females are synovigenic and exhibit resorption when starved at high densities. At low host densities, fed oviposit live eggs daily; unfed adults oviposit approximately every 10 days. Adult spatial and temporal activity patterns directly influence success.

Ecological Role

agent of spruce budworm, a destructive forest pest. of this can be modeled using -dependent parasitoid- interaction models.

Human Relevance

Studied for potential against spruce budworm . Electrophoretic detection methods developed for this enable routine assessment of rates in forest pest management.

Similar Taxa

  • Apanteles fumiferanaeAlso parasitizes spruce budworm larvae; distinguished by cocoon location and activity patterns. Glypta fumiferanae cocoons are found on foliage during , whereas Apanteles fumiferanae estimates rely on potential emergence from previous .
  • Other Glypta speciesGlypta fumiferanae is specifically associated with spruce budworm; other Glypta attack different tortricid .

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