Phorocera

Robineau-Desvoidy, 1830

Species Guides

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Phorocera is a of tachinid flies comprising approximately 13 described . Species in this genus are of various insect , particularly and lepidopteran larvae. Several species have been investigated for of forest pests, including conifer-feeding sawflies and the spruce budworm. 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 insects occur. are associated with forest supporting or spruce budworm .

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 cocoons
  • Choristoneura fumiferana (spruce budworm) - primary Phorocera incrassata is a of this tortricid

Life Cycle

Phorocera incrassata is , with emerging in late June to early July. Females deposit on larvae; 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 cocoons after host cocoon formation, forming puparial cases within host cocoons; adults emerge from both and host cocoons.

Behavior

of Phorocera hamata escape from cocoons 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 insect pests, contributing to natural of and spruce budworm .

Human Relevance

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

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