Phorocera

Robineau-Desvoidy, 1830

Phorocera is a of comprising approximately 13 described . Species in this genus are of various , particularly and lepidopteran . Several species have been investigated for of forest pests, including conifer-feeding sawflies and the . The genus is characterized by specific and morphological features used in identification.

Phorocera by (c) Michael Knapp, some rights reserved (CC BY), uploaded by Michael Knapp. Used under a CC-BY license.Phorocera by (c) Karim Haddad, some rights reserved (CC BY), uploaded by Karim Haddad. Used under a CC-BY license.

Pronunciation

How to pronounce Phorocera: /fəˈrɑsərə/

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Habitat

Conifer forests and other wooded where occur. are associated with forest supporting or .

Distribution

Recorded from Denmark, Norway, and Sweden (GBIF). Distribution likely broader across the Holarctic region given associations with widespread forest pests.

Host Associations

  • sawflies (Hymenoptera: Symphyta) - primary Phorocera hamata develops within
  • Choristoneura fumiferana (spruce budworm) - primary Phorocera incrassata is a of this

Life Cycle

Phorocera incrassata is , with emerging in late June to early July. Females on ; eggs hatch and larvae penetrate host tissue. The overwinters as a larva within the host larva, with host death occurring in spring. occurs within host remains. For Phorocera hamata, larvae develop within after host cocoon formation, forming puparial cases within host cocoons; adults emerge from both and host cocoons.

Behavior

of Phorocera hamata escape from by leaving a characteristic round cap that appears cut from the cocoon wall. The escape mechanism involves alternate expansion and contraction of the against the surrounding cocoon wall.

Ecological Role

of forest pests, contributing to natural of and .

Human Relevance

Investigated and transferred between regions for of forest pests. Phorocera incrassata was moved from Western to Eastern Canada for release against .

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Sources and further reading