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The Biology of the Mountain-ash Sawfly, Pristiphora geniculata (Htg.) (Hymenoptera: Tenthredinidae), in Eastern Canada1

Published online by Cambridge University Press:  31 May 2012

R. S. Forbes  and
L. Daviault
R. S. Forbes
Affiliation:
Forest Entomology and Pathology Laboratory, Fredericton, New Brunswick
L. Daviault
Affiliation:
Forest Entomology and Pathology, Forest Research Laboratory, Sillery, (Quebec), P.Q.
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Abstract

The mountain-ash sawfly, Pristiphora geniculata (Htg.), a pest on Sorbus spp., is known to occur in Europe, Asia, and North America. It has two generations a year in eastern Canada but only one in northern Quebec. The first generation predominates. The sawfly overwinters as a larva in a cocoon in litter or soil. Adults emerge from late May to early July, and lay eggs in pockets between the epidermal lavers around the edges of leaflets. The eggs hatch in about a week and the larvae feed from two to three weeks. The second generation, which starts in late July, is usually small. Adults producing the first generation may come from both generations of the preceding year whereas adults producing the second generation stem only from the first. Parthenogenesis is facultative and arrhenotokous; about 61% of adults reared were females. The male larvae have four instars and the female five. Some larvae remain in diapause up to five years. Foliage consumption of female larvae was about 1.4 times that of male larvae.

P. geniculata lacks adequate density-dependent control factors and an important limiting factor may be its scattered food supply. The introduction of parasites, predators, or disease organisms might be beneficial.

Type
Articles
Information
The Canadian Entomologist , Volume 96 , Issue 8 , August 1964 , pp. 1117 - 1133
Copyright
Copyright © Entomological Society of Canada 1964

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References

Baer, W. 1921. Die Tachinen als Schmarotzer der schädlichen Insekten. Ihre Lebensweise, wirtschaftliche Bedeutung und systematische Kennzeichnung. Paul Parey, Berlin.Google Scholar
Beaulne, J. I. 1939. Parasites and predators reared at Quebec. Canad. Ent. 71: 120.Google Scholar
Benson, R. B. 1950. An introduction to the natural history of British sawflies (Hymenoptera Symphyta). Trans. Soc. Brit. Ent. 10: 45–142.Google Scholar
Benson, R. B. 1958. Hymenoptera (Symphyta). Handbooks for the identification of British insects. Royal Ent. Soc. Lond. 6(2C): 139–252.Google Scholar
Brischke, C. G. A., and Zaddach, G.. 1882. Beobachtungen über die Arten der Blatt- und Holzwespen. Schriften physikal.-ökonom. Ges. Königsberg 23: 127–200, plate 4.Google Scholar
Brischke, C. G. A., and Zaddach, G.. 1883. Beobachtungen über die Arten der Blatt- und Holzwespen. Schriften physikal.-ökonom. Ges. Königsberg 24, 409 pp.Google Scholar
Buckner, C. H. (1958). Mammalian predators of the larch sawfly in eastern Manitoba. Proc. 10th int. Congr. Ent., Montreal (1956) 4: 353–361.Google Scholar
Canada Dept. Forestry. 1961. Native trees of Canada. 6th ed. Queen's Printer, Ottawa.Google Scholar
Daviault, L. 1938. La mouche à scie du sorbier. Bibliothèque des Jeunes Naturalistes 49, 4 pp.Google Scholar
Daviault, L. 1947a. Note sur la diapause de la tenthrède du sorbier (Pristiphora geniculata Htg.). Annales de l'Acfas 13: 94.Google Scholar
Daviault, L. 1947b. Action de la température et de l'humidité sur la biologie de Pristiphora geniculata Htg. (Hyménoptère, Tenthredinidé). Rev. Canad. Biol. 6: 366–368.Google Scholar
Daviault, L. 1948. La tenthrède du sorbier. Ministère des Terres et Forêts, Bureau d'Entomologie, Québec Circ. 16, 4 pp.Google Scholar
Delmas, R. 1926. Notes sur la biologie de Pristiphora conjugata Dahlbom. Bull. biol. Fr. 60: 447–472.Google Scholar
Enslin, E. 1912–1917. Die Tenthredinoidea Mitteleuropas. Beih. Deut. ent. Z. 790 pp.Google Scholar
Hartig, T. 1840. Hymenopterologische Mittheilungen. Stettin ent. Ztg. 1: 19–28.Google Scholar
(Reprinted in Ent. Nachr. 10: 317–326. 1884.)Google Scholar
Hawboldt, L. S. 1947. Bessa selecta (Meigen) (Diptera: Tachinidae) as a parasite of Gilpinia hercyniae (Hartig) (Hymenoptera: Diprionidae). Canad. Ent. 79: 84–104.Google Scholar
Herting, B. 1960. Biologie der westpaläarktischen Raupenfliegen, Dipt., Tachinidae. Monogr. angew. Ent. 16, 188 pp.Google Scholar
Konow, F. W. 1890. Tenthredinidae Europae. Deut. ent. Z. 34: 225–255.Google Scholar
Konow, F. W. 1902. Die Nematiden-Gattung Pristiphora Latr. (Hymenoptera, Tenthredinidae) soweit dieselbe bisher aus der palaearctischen Zone bekannt ist. St. Petersburg. (Extrait de l'Annuaire Mus. Zool. St. Petersbourg. 7: 161–187.Google Scholar
Lorenz, H., and Kraus, M.. 1957. Die Larvalsystematik der Blattwespen. Abhandlungen zur Larvalsystematik der Insekten 1. Akademie-Verlag, Berlin.Google Scholar
McGugan, B. M., and Coppel, H. C.. 1962. Part II—Biological control of forest insects, 1910–1958, pp. 35–216. In A review of the biological control attempts against insects and weeds in Canada. Tech. Commun. Commonw. Inst. Biol. Contr. 2, 216 pp. Commonw. Agric. Bureau, Farnham Royal, Bucks, England.Google Scholar
Miles, H. W. 1932. Biological studies of sawflies infesting Ribes. Bull. ent. Res. 23: 1–15.CrossRefGoogle Scholar
Morice, F. D. 1922. Two sawflies new to Britain Scolioneura tenella Klug and Pristiphora geniculata Hartig. Ent. mon. Mag. 58: 197–200.Google Scholar
Morris, R. F. 1949. Differentiation by small mammal predators between sound and empty cocoons of the European spruce sawfly. Canad. Ent. 81: 114–120.CrossRefGoogle Scholar
Morris, R. F. 1951. The larval Elateridae of eastern spruce forests and their role in the natural control of Gilpinia hercyniae (Htg.) (Hymenoptera: Diprionidae). Canad. Ent. 83: 133–147.Google Scholar
Peck, O. 1951. Superfamily Chalcidoidea, pp. 410–594. In Muesebeck, C. F. W., Krombein, K. V. and Townes, H. K.. Hymenoptera of America north of Mexico, Synoptic catalog. U.S. Dep. Agric., Monogr. 2, 1420 pp.Google Scholar
Petch, C. E. 1935. Forest and shade tree insects. Canad. Ins. Pest Rev. 13: 147.Google Scholar
Raizenne, H. 1957. Forest sawflies of southern Ontario and their parasites. Can. Dep. Agric., For. Biol. Div., Publ. 1009, 45 pp.Google Scholar
Rossum, A. J. van. 1904. Pristiphora geniculata Htg. In Verslag 59th Zomerverg. Nederlandsche ent. Vereeniging. Tijdschr. Ent. 47: 61–62.Google Scholar
Schaffner, J. V. Jr. 1936. European sawfly Pristiphora geniculata attacks mountain ash in the United States. J. econ. Ent. 29: 469.Google Scholar
Schaffner, J. V. Jr. 1940. The mountain ash sawfly (Pristiphora geniculata (Hartig)) Mass. For. and Park Assoc. Tree Pest Leafl. No. 50, 4 pp.Google Scholar
Severin, H. H. P., and Severin, H. C. M.. 1908. Habits of the American sawfly, Cimbex americana Leach, with observations on its egg parasite, Trichogramma pretiosa Riley. Trans. Wisc. Acad. Sci., Arts Letters 16: 61–76.Google Scholar
Sippell, W. L., MacDonald, J. E., and Rose, A. H.. 1961. Province of Ontario. Annu. Rep. For. Ins. and Dis. Surv. 1960: 45–63. Can. Dep. For., For. Ent. and Pathol. Br., Ottawa.Google Scholar
Twinn, C. R. 1938. A summary of the insect pest situation in Canada in 1938. Annu. Rep. ent. Soc. Ont. 69: 121–139.Google Scholar
Wolff, M. 1924. Ueber Blattwespenfrass auf Sorbus aucuparia. Z. Forst- und Jagdwesen 56: 38–46.Google Scholar