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Some Forest Entomological Methods and Conceptions

Published online by Cambridge University Press:  10 July 2009

Ivar Trägårdh and
Viktor Butovitsch
Ivar Trägårdh
Affiliation:
Entomological Department, Royal Swedish Institute of Experimental Forestry, Experimentalfältet, Sweden.
Viktor Butovitsch
Affiliation:
Entomological Department, Royal Swedish Institute of Experimental Forestry, Experimentalfältet, Sweden.
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Extract

During recent years in Sweden much time and work has been devoted to the devising of accurate and withal time-saving methods of estimating the number of bark-beetles breeding in a trunk as well as the total number of bark-beetles per hectare in a given instance. The results achieved by the methods finally adopted seem to us so satisfactory that we venture to think that the methods in question may be used to advantage even in other countries, when similar problems arise.

Information

Type
Original Articles
Information
Bulletin of Entomological Research , Volume 29 , Issue 2 , July 1938, pp. 191 - 210
Copyright
Copyright © Cambridge University Press 1938

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References

Golovjanko, Z. S. (1926). Zur Methodik der Bestimmung des Borkenkäferbefalls an Kiefer.—Mitt. forstl. Versuchsw. Ukr. 4 (Russisch mit deutscher Zusammenfassung).Google Scholar
Miller, J. M. & Patterson, J. E. (1927). Preliminary studies on the relation of fire injury to bark-beetle attack in western yellow pine.—J. Agric. Res. 34, no. 7.Google Scholar
Saalas, U. (1928). Über die Anwendung der Linienabschätzung bei der Frequenzbestimmung von Forstinsekten.—Int. Congr. Ent., 4 (2) Trans.Google Scholar
Schedl, K. E. (1936). Populationsregulatoren und ihre Wechselbeziehungen bei Borkenkäfern.—Z. angew. Ent. 23.Google Scholar
Seitner, M. (1922). Kurze Anleitung zur Bekämpfung des 8-zähnigen Fichtenborkenkäfers, Ips typographus L. Wien.Google Scholar
Seitner, M. (1923). Beobachtungen und Erfahrungen aus dem Auftreten des achtzähnigen Fichtenborkenkäfers Ips typographus L. in Ober-Österreich und Steiermark in den Jahren 1921 und 1922.—Cbl. ges. Forstw., 49.Google Scholar
Trägårdh, I. (1927). Entomologiska analyser av torkande träd.—Medd. Skogsförsoksanst. 23 (3).Google Scholar
Trägårdh, I. (1929). Methods of investigating the fauna of dying trees.—Proc. Int. Congr. For. Exp. Sta., Stockholm, 1929.Google Scholar
Trägårdh, I. (1934). A new method of obtaining an accurate estimate of the number of insects infesting storm-ravaged forests.—Proc. 5. Pac. Sci. Congr. Canada, 1933, 5.Google Scholar
Trägårdh, I. & Butovitsch, V. (1934). Redogörelse för barkborrekampanjen efter stormhärjningarna 1931–1932. (Bericht über die Bekämpfungsaktion gegen Borkenkäfer nach den Sturmverheerungen 1931–1932.)—Medd. Skogsförsoksanst. 28.Google Scholar
Trägårdh, I. & Butovitsch, V. (1937). Einige Bemerkungen über quantitative Untersuchungsmethoden zur Berechnung des Borkenkäferbefalls.—Z. angew. Ent. 24 (2).Google Scholar