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A Radiographic Technique to Identify Healthy, Parasitized, and Diseased Sawfly Prepupae Within Cocoons1

Published online by Cambridge University Press:  31 May 2012

C. S. Holling
C. S. Holling
Affiliation:
Forest Insect Laboratory, Sault Ste. Marie, Ontario
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Extract

Many entomological problems require the identification and observation of insects without disturbing their surroundings. Such problems are usually concerned with insects within host or pupal coverings and radiography is a method well suited to their solution. The technique is a special type of radiography in which soft X-rays (wave length longer than about 0.25A), passing through an object of low density, produce a shadow image on fine-grain film in contact with the object.

Type
Articles
Information
The Canadian Entomologist , Volume 90 , Issue 1 , January 1958 , pp. 59 - 61
Copyright
Copyright © Entomological Society of Canada 1958

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References

(1)Fenton, F. A., and Waite, W. W.. 1932. Detecting pink boll-worms in cotton seeds by the X-ray. J. Agric. Res., 14: 347.Google Scholar
(2)Fisher, R. C., and Tasker, H. S.. 1940. The detection of wood-boring insects by means of X-rays. Ann. Appl. Biol., 27: 92–100.CrossRefGoogle Scholar
(3)Milner, M., Lee, M. R., and Katz, R.. 1950. Application of X-ray technique to the detection of insect infestation of grain J. Econ. Ent., 43: 933–935.CrossRefGoogle Scholar
(4)Milner, M., Lee, M. R., and Katz, R.. 1952. Radiography applied to grain and seeds. Food Technol., 6(2): 44–45.Google Scholar