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

AUTOR(ES)

Johnson, Donovan E.

RESUMO

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.

Documentos Relacionados

• Two Different Bacillus thuringiensis Delta-Endotoxin Receptors in the Midgut Brush Border Membrane of the European Corn Borer, Ostrinia nubilalis (Hübner) (Lepidoptera: Pyralidae)
• Genetic Variation in the Strongly Canalized Sex Pheromone Communication System of the European Corn Borer, Ostrinia Nubilalis Hubner (Lepidoptera; Pyralidae)
• Silent genes and rare males: A fresh look at pheromone blend response specificity in the European corn borer moth, Ostrinia nubilalis
• No Linkage between Genes Controlling Female Pheromone Production and Male Pheromone Response in the European Corn Borer, Ostrinia Nubilalis Hubner (Lepidoptera; Pyralidae)
• Binding Analyses of Bacillus thuringiensis Cry δ-Endotoxins Using Brush Border Membrane Vesicles of Ostrinia nubilalis