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Appl Environ Microbiol. Aug 1981; 42(2): 385–387.
PMCID: PMC244020

Toxicity of Bacillus thuringiensis Spo Cr+ Mutants for the European Corn Borer Ostrinia nubilalis

Abstract

Inclusion bodies isolated from Spo Cr+ mutants of Bacillus thuringiensis were toxic for larvae of the European corn borer. Probit analysis revealed comparable toxicity between wild-type crystals (isolated from B. thuringiensis subsp. kurstaki) and crystals produced from two spore-free mutants of the same subspecies. Death of the larvae was due to starvation, presumably through δ-endotoxin-induced gut paralysis. Inclusion bodies pretreated with α-chymotrypsinogen were equally as toxic as native crystals for the insect larvae.

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Selected References

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