Hostname: page-component-586b7cd67f-dlnhk Total loading time: 0 Render date: 2024-11-24T10:37:55.540Z Has data issue: false hasContentIssue false
  • English
  • Français

THE EFFECT OF SOLAR RADIATION ON CONE INSECTS OF EASTERN WHITE PINE (PINUS STROBUS) IN THE FREDERICTON AREA, NEW BRUNSWICK1

Published online by Cambridge University Press:  31 May 2012

J. A. Odera
J. A. Odera
Affiliation:
Forest Department, Kikuyu, Kenya
Get access Rights & Permissions [Opens in a new window]

Abstract

Internal cone temperatures recorded in the mornings and in the afternoons demonstrated marked differences between sunny and shaded sites. Analysis of variance confirmed differences between treatment as highly significant. High and low cone temperatures coincided with high and low ground temperatures. The average correlation coefficient relating cone and ground temperatures was highly significant, while that for cone temperatures and cone size was non-significant.

Heavy insect mortality occurred in cones exposed to direct solar radiation but mortality remained relatively low in the cones left in the shade. The greatest high-temperature mortality occurred during summer between late June and early August.

Type
Articles
Information
The Canadian Entomologist , Volume 103 , Issue 4 , April 1971 , pp. 605 - 609
Copyright
Copyright © Entomological Society of Canada 1971

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Bedard, W. D. 1966. High temperature mortality of the sugar-pine cone beetle, Conophthorus lambertianae Hopkins (Coleoptera: Scolytidae). Can. Ent. 98: 152–157.CrossRefGoogle Scholar
Curtis, O. F. 1936. Leaf temperatures and cooling of leaves by radiation. Pl. Physiol. 11: 343–364.CrossRefGoogle ScholarPubMed
Henson, W. R. 1964. Laboratory studies on the adult behavior of Conophthorus coniperdus (Coleoptera: Scolytidae). IV: Response to temperature and humidity. Ann. ent. Soc. Am. 57: 77–85.CrossRefGoogle Scholar
Henson, W. R. and Shepherd, R. F.. 1952. The effects of radiation on the habitat temperatures of the lodgepole needle miner, Recurvaria milleri Busck (Lepidoptera: Gelechiidae). Can. J. Zool. 30: 144–153.CrossRefGoogle Scholar
Schaefer, C. H. 1963. Factors affecting the distribution of the Monterey pine cone beetle (Conophthorus radiatae Hopkins) in Central California. Hilgardia 34: 79–103.CrossRefGoogle Scholar
Wellington, W. G. 1950. Effects of radiation on the temperatures of insectan habitats. Scient. Agric. 30: 209–234.Google Scholar