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An Effect of Bacillus sotto on the Larvae of Bombyx mori1

Published online by Cambridge University Press:  31 May 2012

T. A. Angus  and
A. M. Heimpel
T. A. Angus
Affiliation:
Laboratory of Insect Pathology, Sault Ste. Marie, Ont.
A. M. Heimpel
Affiliation:
Laboratory of Insect Pathology, Sault Ste. Marie, Ont.
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Extract

The paralysis of silkworm larvae (Bombyx mori L.) caused by Bacillus sotto Ishiwata and the extraction of a toxic protein from cultures of this microorganism have been reported elsewhere (1, 2, 3). In preliminary studies of the mode of action, changes have been noted in the pH of the blood of affected larvae.

Fourth- and fifth-instar larvae were fed foliage coated with B. sotto toxin and at intervals the blood pH was determined as described by Heimpel (4). Control larvae, reared from the same egg mass, were fed untreated foliage.

Type
Articles
Information
The Canadian Entomologist , Volume 88 , Issue 3 , March 1956 , pp. 138 - 139
Copyright
Copyright © Entomological Society of Canada 1956

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References

(1)Angus, T. A. General characteristics of certain insect pathogens related to Bacillus cereus. In press. Can. J. Microbiol.Google Scholar
(2)Angus, T. A. Association of toxicity with protein-crystalline inclusions of Bacillus sotto Ishiwata. In press. Can. J. Microbiol.Google Scholar
(3)Angus, T. A. Extraction, purification, and properties of Bacillus sotto toxin. In press. Can. J. Microbiol.Google Scholar
(4)Heimpel, A. M.The pH in the gut and blood of the larch sawfly, Pristiphora eriohsonii (Htg.) and other insects with reference to the pathogenicity of Bacillus cereus Fr. and Fr. Can. J. Zool. 33: 99–106. 1955.CrossRefGoogle Scholar
(5)Gamo, T., Yamaguchi, S., and Nagai, S.. Gut permeability change due to respiratory injury, silkworm. Bull. Sericult. Silk. Ind. (Japan) 5, 1–2, 1933. As cited in Insect Physiology, edited by K. D. Roeder, John Wiley and Sons, New York, 1953.Google Scholar