Seed cone traits and insect damage in Tsuga canadensis (Pinaceae)

We measured seed cones of Tsuga canadensis (L.) Carrière, assessed seed potential (number of fertile scales x 2) and seed efficiency (number of filled seeds/seed potential), and estimated the impact of Eupithecia mutata Pearsall (Lepidoptera: Geometridae) and Megastigmus hoffmeyeri Walley (Hymenopte...

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Detalles Bibliográficos
Autores principales: Turgeon, J.J., Jones, C., Bellocq, M.I.
Formato: JOUR
Materias:
Biodiversity
Insect control
Seed
Seed efficiency
Seed potential
Forestry
efficiency measurement
forestry
pest damage
seed
Eupithecia
Eupithecia mutata
Geometridae
Hexapoda
Hymenoptera
Insecta
Lepidoptera
Megastigmus
Pinaceae
Torymidae
Tsuga
Tsuga canadensis
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00455067_v34_n1_p261_Turgeon
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_00455067_v34_n1_p261_Turgeon
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spelling todo:paper_00455067_v34_n1_p261_Turgeon2023-10-03T14:51:54Z Seed cone traits and insect damage in Tsuga canadensis (Pinaceae) Turgeon, J.J. Jones, C. Bellocq, M.I. Biodiversity Insect control Seed Seed efficiency Seed potential Forestry efficiency measurement forestry pest damage seed Eupithecia Eupithecia mutata Geometridae Hexapoda Hymenoptera Insecta Lepidoptera Megastigmus Pinaceae Torymidae Tsuga Tsuga canadensis We measured seed cones of Tsuga canadensis (L.) Carrière, assessed seed potential (number of fertile scales x 2) and seed efficiency (number of filled seeds/seed potential), and estimated the impact of Eupithecia mutata Pearsall (Lepidoptera: Geometridae) and Megastigmus hoffmeyeri Walley (Hymenoptera: Torymidae) on seed production. Mean length, width, and volume of healthy cones varied little among sites from Ontario. Cones had about 28 scales; 13 were sterile. Seed potential and seed efficiency differed among sites, ranging from 25 to 31 ovules and 24% to 72%, respectively. The number of scales (both sterile and fertile) increased with cone volume, but the proportion of fertile scales was independent of cone size. The maximum proportion of cones infested by E. mutata was 21%. On average, each larva destroyed >90% of the filled seeds from each cone, thus from a practical perspective, the proportion of T. canadensis seeds destroyed per site was equivalent to the proportion of seed cones infested. The proportion of cones infested by M. hoffmeyeri ranged from 9% to 40%, but the proportion of seeds destroyed per site (range: 1.1%-6.1%) was much lower than that of E. mutata. The maximum number of M. hoffmeyeri-infested seeds per cone was seven. To our knowledge, this is the first report documenting cone traits of T. canadensis and the impact of E. mutata and M. hoffmeyeri. Fil:Bellocq, M.I. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00455067_v34_n1_p261_Turgeon
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Biodiversity
Insect control
Seed
Seed efficiency
Seed potential
Forestry
efficiency measurement
forestry
pest damage
seed
Eupithecia
Eupithecia mutata
Geometridae
Hexapoda
Hymenoptera
Insecta
Lepidoptera
Megastigmus
Pinaceae
Torymidae
Tsuga
Tsuga canadensis
spellingShingle Biodiversity
Insect control
Seed
Seed efficiency
Seed potential
Forestry
efficiency measurement
forestry
pest damage
seed
Eupithecia
Eupithecia mutata
Geometridae
Hexapoda
Hymenoptera
Insecta
Lepidoptera
Megastigmus
Pinaceae
Torymidae
Tsuga
Tsuga canadensis
Turgeon, J.J.
Jones, C.
Bellocq, M.I.
Seed cone traits and insect damage in Tsuga canadensis (Pinaceae)
topic_facet Biodiversity
Insect control
Seed
Seed efficiency
Seed potential
Forestry
efficiency measurement
forestry
pest damage
seed
Eupithecia
Eupithecia mutata
Geometridae
Hexapoda
Hymenoptera
Insecta
Lepidoptera
Megastigmus
Pinaceae
Torymidae
Tsuga
Tsuga canadensis
description We measured seed cones of Tsuga canadensis (L.) Carrière, assessed seed potential (number of fertile scales x 2) and seed efficiency (number of filled seeds/seed potential), and estimated the impact of Eupithecia mutata Pearsall (Lepidoptera: Geometridae) and Megastigmus hoffmeyeri Walley (Hymenoptera: Torymidae) on seed production. Mean length, width, and volume of healthy cones varied little among sites from Ontario. Cones had about 28 scales; 13 were sterile. Seed potential and seed efficiency differed among sites, ranging from 25 to 31 ovules and 24% to 72%, respectively. The number of scales (both sterile and fertile) increased with cone volume, but the proportion of fertile scales was independent of cone size. The maximum proportion of cones infested by E. mutata was 21%. On average, each larva destroyed >90% of the filled seeds from each cone, thus from a practical perspective, the proportion of T. canadensis seeds destroyed per site was equivalent to the proportion of seed cones infested. The proportion of cones infested by M. hoffmeyeri ranged from 9% to 40%, but the proportion of seeds destroyed per site (range: 1.1%-6.1%) was much lower than that of E. mutata. The maximum number of M. hoffmeyeri-infested seeds per cone was seven. To our knowledge, this is the first report documenting cone traits of T. canadensis and the impact of E. mutata and M. hoffmeyeri.
format JOUR
author Turgeon, J.J.
Jones, C.
Bellocq, M.I.
author_facet Turgeon, J.J.
Jones, C.
Bellocq, M.I.
author_sort Turgeon, J.J.
title Seed cone traits and insect damage in Tsuga canadensis (Pinaceae)
title_short Seed cone traits and insect damage in Tsuga canadensis (Pinaceae)
title_full Seed cone traits and insect damage in Tsuga canadensis (Pinaceae)
title_fullStr Seed cone traits and insect damage in Tsuga canadensis (Pinaceae)
title_full_unstemmed Seed cone traits and insect damage in Tsuga canadensis (Pinaceae)
title_sort seed cone traits and insect damage in tsuga canadensis (pinaceae)
url http://hdl.handle.net/20.500.12110/paper_00455067_v34_n1_p261_Turgeon
work_keys_str_mv AT turgeonjj seedconetraitsandinsectdamageintsugacanadensispinaceae
AT jonesc seedconetraitsandinsectdamageintsugacanadensispinaceae
AT bellocqmi seedconetraitsandinsectdamageintsugacanadensispinaceae
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