Woodwasps (Siricidae) in Conifers and the Associated Fungus, Stereum chailletii, in Eastern Canada

Sirex juvencus L., Urocerus albicornis F., U. gigas flavicornis F., and Xeris spectrum I., woodwasps were found in coniferous forests in New Brunswick and Nova Scotia. The dominant species, S. juvencus, chiefly attacked weakened and newly dead balsam fir. Its life cycle, normally 2 years, was completed in 7 months when the woodwasps were reared indoors (22° C) in balsam fir logs. Only males were produced from eggs laid by unmated S. juvencus. Stereum chailletii (Pers.) Fr. was the only fungus isolated from the intersegmental sacs of the Sirex and Urocerus species. It was associated with each developmental stage of female S. juvencus. Larvae hatched from eggs laid by mated and unmated S. juvencus did not develop beyond the first instar when S. chailletii was not introduced into the wood during oviposition. Oidia of S. chailletii were not found in the vestigial intersegmental sacs of X. spectrum.

• Publication year

  1966

• Venue

  Forestry sciences

• Publication date

  1966-03-01

• Fields of study

  Biology, Environmental Science

• Identifiers
  DOI 10.1093/forestscience/12.1.121
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar

• No oidia of Stereum chailletii were found in the vestigial intersegmental sacs of Xeris spectrum.

  Confidence 0.94

  박진우 (dztg5apj7m) extractionB (s683577b42) reviewAnonymous (12632b8b5f) reviewAK (4715169a40) review
• Larvae failed to develop beyond first instar when Stereum chailletii was not introduced into the wood during oviposition.

  Confidence 0.97

  박진우 (dztg5apj7m) extractionB (s683577b42) reviewAnonymous (12632b8b5f) reviewAK (4715169a40) review
• Stereum chailletii was associated with each developmental stage of female Sirex juvencus.

  Confidence 0.95

  박진우 (dztg5apj7m) extractionB (s683577b42) reviewAnonymous (12632b8b5f) reviewAK (4715169a40) review
• Stereum chailletii was the only fungus isolated from the intersegmental sacs of the Sirex and Urocerus species sampled.

  Confidence 0.96

  박진우 (dztg5apj7m) extractionB (s683577b42) reviewAnonymous (12632b8b5f) reviewAK (4715169a40) review
• Unmated Sirex juvencus produced only male offspring.

  Confidence 0.99

  박진우 (dztg5apj7m) extractionB (s683577b42) reviewAnonymous (12632b8b5f) reviewAK (4715169a40) review
• The normally two-year life cycle of Sirex juvencus was completed in about seven months when it was reared indoors at 22°C in balsam fir logs.

  Confidence 0.97

  박진우 (dztg5apj7m) extractionB (s683577b42) reviewAnonymous (12632b8b5f) reviewAK (4715169a40) review
• Sirex juvencus was the dominant species and chiefly attacked weakened and newly dead balsam fir.

  Confidence 0.98

  박진우 (dztg5apj7m) extractionB (s683577b42) reviewAnonymous (12632b8b5f) reviewAK (4715169a40) review

• balsam fir

  conifer species

  A conifer species that served as the main host and log substrate in the observations.

  박진우 (dztg5apj7m) extractionB (s683577b42) reviewAnonymous (12632b8b5f) reviewAK (4715169a40) review
• intersegmental sacs

  anatomical structures

  Vestigial sac-like structures associated with female siricid woodwasps and examined for fungal contents.

  박진우 (dztg5apj7m) extractionB (s683577b42) reviewAnonymous (12632b8b5f) reviewAK (4715169a40) review
• sirex juvencus

  insect taxa

  A siricid woodwasp species included among the conifer-associated insects examined in eastern Canada.

  Aliases: S. juvencus

  박진우 (dztg5apj7m) extractionB (s683577b42) reviewAnonymous (12632b8b5f) reviewAK (4715169a40) review
• stereum chailletii

  fungal species

  A fungal species recovered from siricid intersegmental sacs and associated with the woodwasps in the study.

  Aliases: S. chailletii

  박진우 (dztg5apj7m) extractionB (s683577b42) reviewAnonymous (12632b8b5f) reviewAK (4715169a40) review
• urocerus albicornis

  insect taxa

  A siricid woodwasp taxon recorded from the conifer forests sampled in New Brunswick and Nova Scotia.

  Aliases: U. albicornis

  박진우 (dztg5apj7m) extractionB (s683577b42) reviewAnonymous (12632b8b5f) reviewAK (4715169a40) review
• urocerus gigas flavicornis

  insect taxa

  A siricid woodwasp taxon recorded from the conifer forests sampled in New Brunswick and Nova Scotia.

  Aliases: U. gigas flavicornis

  박진우 (dztg5apj7m) extractionB (s683577b42) reviewAnonymous (12632b8b5f) reviewAK (4715169a40) review
• xeris spectrum

  insect taxa

  A siricid woodwasp species included in the survey and examined for intersegmental sacs.

  Aliases: X. spectrum

  박진우 (dztg5apj7m) extractionB (s683577b42) reviewAnonymous (12632b8b5f) reviewAK (4715169a40) review

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