Hostname: page-component-78c5997874-lj6df Total loading time: 0 Render date: 2024-11-19T13:18:08.821Z Has data issue: false hasContentIssue false
  • English
  • Français

Observations on Males and Females of Sitophilus granarius (L.), the Granary Weevil, GG Strain, Exposed for Six Generations to Allethrin and Piperonyl Butoxide

Published online by Cambridge University Press:  31 May 2012

C. Sevintuna  and
A. J. Musgrave
C. Sevintuna
Affiliation:
Department of Entomology and Zoology, Ontario Agricultural College
A. J. Musgrave
Affiliation:
Department of Entomology and Zoology, Ontario Agricultural College
Get access Rights & Permissions [Opens in a new window]

Extract

In a recent discussion of the subject of insect resistance to insecticides, Brown (1958) has claimed that true resistance is characterized by a five-fold to ten-fold decrease in susceptibility. It is a genetic phenomenon arising as a result of selection. There is no evidence that insecticides are mutagenic, nor can resistance be induced by exposing insects to sublethal doses. A decrease in susceptibility that cannot be regarded as resistance is regarded as a condition of tolerance. In addition, the term “vigour tolerance”, intioduced by Hoskins and Gordon (see Brown, 1958) defines instances of enhanced tolerance due to extra vigour: true specific resistance is marked by a change of slope in the dosage-mortality regression line, while “vigour tolerance” is suggested if the regression line shifts but does not change in slope.

Type
Articles
Information
The Canadian Entomologist , Volume 93 , Issue 7 , July 1961 , pp. 545 - 552
Copyright
Copyright © Entomological Society of Canada 1961

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

Back, E. A., and Cotton, R. I. 1926. The granary weevil. U.S. Dept. of Agr., Dept. Bull. No. 1393: 1–36.Google Scholar
Brown, A. W. A. 1958. Insecticide resistance in arthropods. Wld. Hlth. Org. Monograph Series No. 38: 13–30.Google Scholar
Bruce, W. N. 1950. Current report on house-fly resistance to insecticides. Pest Control 18, No. 4, pp. 9–10, 19.Google Scholar
Busvine, J. R., and Khan, N. H. 1955. Inheritance of BHC-resistance in the housefly. Trans. Roy. Soc. Trop. Med. Hyg. 49: 455–459.CrossRefGoogle ScholarPubMed
Busvine, J. R. 1957. A critical review of the techniques for testing insecticides. Commonwlth. Inst. of Ent., 56, Queen's Gate, London.Google Scholar
Cochran, W. G., and Cox, G. M. 1957. Experimental designs. John Wiley and Sons, Inc. New York.Google Scholar
Harrison, C. M. 1952. DDT resistance in an Italian strain of Musca domestica. Bull. Ent. Res. 42: 761–768.CrossRefGoogle Scholar
Harrison, C. M. 1954. Genetical aspects of DDT-resistance in the house-fly. R.C. 1st Sup. Sanita, Suppl: 235–252.Google Scholar
Litchfield, J. T., and Wilcoxon, F. 1949. A simplified method of evaluating dose effect experiments. J. Pharmacol. 96: 99–113.Google ScholarPubMed
Musgrave, A. J., and Miller, J. J. 1958. Studies of the Association between strains and species of Sitophilus weevils and their mycetomal micro-organisms. Proc. X Int. Cong. Ent. 2: 315–318.Google Scholar
Orr, C. W. M. 1958. Observations on successive generations of the granary weevil Sitophilus granarius (L), treated with gamma benzene hexachloride. Unpublished thesis. University of Toronto.Google Scholar
Pimentel, D., Schwardt, H. H., and Dewey, J. E. 1953. Development and loss of insecticide resistance in the house-fly. J. Econ. Ent. 46: 295–298.CrossRefGoogle Scholar
Pimentel, D., Schwardt, H. H., and Dewey, J. E. 1954. The inheritance of DDT-resistance in the house-fly, Ann. Ent. Soc. Amer. 47: 208–213.CrossRefGoogle Scholar
Richards, O. W. 1948. The interaction of environmental and genetic factors in determining the weight of grain weevils Calandra granaria (L) (Col. curculionidae). Proc. Zool. Soc. 118: 49–81.CrossRefGoogle Scholar
Sevintuna, C., and Musgrave, A. J. 1960. A note on sexual dimorphism in Sitophilus weevils. Can. Ent. 92: 467–469.CrossRefGoogle Scholar
Snedecor, G. W. 1956. Statistical methods. Applied to experiments in agriculture and biology. The Iowa State U.S.A. Coll. Press, Ames, Iowa.Google Scholar