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THE BIOLOGY OF NEODIPRION NIGROSCUTUM (HYMENOPTERA: DIPRIONIDAE) IN WISCONSIN1

Published online by Cambridge University Press:  31 May 2012

G. C. Becker  and
D. M. Benjamin
D. M. Benjamin
Affiliation:
Assistant Professor of Biology, Metropolitan State College, Denver, Colorado; Professor, Department of Entomology, University of Wisconsin, Madison.
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Abstract

The specific status of Neodiprion nigroscutum Middleton is firmly established by new data. The adult female is mostly black and brown. The second annulus of the lancet is generally weakly developed ventrally. The larvae have black head capsules in the first instar, but this coloration usually changes to reddish brown in the later instars. The third, fourth, and fifth feeding-instar larvae have unbroken subdorsal and supraspiracular lines, and broken postepipleural lines, but lack an epiproctal spot. The nonfeeding-instar larvae often have a pink body color. The egg mass of most females is green. Jack pine is the preferred host. The fecundity is approximately 100 eggs, but they are typically distributed over many branches, usually in one needle on each branch. Larval colonies composed of first- through fourth-instar larvae usually contain 3–10 larvae, while colonies of fifth-instar larvae usually contain 1–6 larvae. There are two generations per year in southern Wisconsin. Feeding-instar larvae are present in late May and June, and again (second generation) in August and September. The species is distributed throughout the jack pine stands of Wisconsin. Phenological data and notes on parasites are presented.

Type
Articles
Information
The Canadian Entomologist , Volume 99 , Issue 2 , February 1967 , pp. 146 - 159
Copyright
Copyright © Entomological Society of Canada 1967

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References

Atwood, C. E. 1961. Present status of the sawfly family Diprionidae (Hymenoptera) in Ontario. Proc. ent. Soc. Ont. 91: 205–215.Google Scholar
Atwood, C. E., and Peck, O.. 1943. Some native sawflies of the genus Neodiprion attacking pines in eastern Canada. Can. J. Res., Sect. D, Zool. Sci. 21: 109–144.CrossRefGoogle Scholar
Becker, G. C. 1965a. A biological-taxonomic study of the Neodiprion virginianus complex in Wisconsin. Ph.D. Thesis. University of Wisconsin.Google Scholar
Becker, G. C. 1965a. The seasonal succession of sawflies in pine plantations. Proc. North Central Br. ent. Soc. Amer. 20: 150–151.Google Scholar
Benjamin, D. M., and Renlund, D. W.. 1961. A phenological survey of red pine in Wisconsin. Wis. Acad. Rev. 8: 26–28.Google Scholar
Brygider, W. 1952. In what embryonic stage do the eggs of Neodiprion enter the winter diapause? Can. J. Zool. 30: 90–108.CrossRefGoogle Scholar
Burks, B. D. 1958. Suborder Symphyta. pp. 8–18in Krombein, K. V. et al. , Hymenoptera of America North of Mexico—Synoptic Catalog (First Suppl.). U.S.D.A. Agr. Monogr. 2.Google Scholar
Middleton, W. 1933. Five new sawflies of the genus Neodiprion Rohwer. Can. Ent. 65: 77–84.CrossRefGoogle Scholar
Ross, H. H. 1951. Superfamily Tenthredinoidea. pp. 12–82in Muesebeck, C. F. W. et al. , Hymenoptera of America North of Mexico—Synoptic Catalog. U.S.D.A. Agr. Monogr. 2.Google Scholar
Ross, H. H. 1955. Taxonomy and evolution of the sawfly genus Neodiprion. For. Sci. 1: 196–209.Google Scholar
Wallace, D. R., and Sippell, W. L.. 1958. First records of two pine sawflies in Michigan. J. econ. Ent. 51: 125.CrossRefGoogle Scholar