Larval survival and development of susceptible and resistant Ostrinia nubilalis (Lepidoptera: Pyralidae) on diet containing Bacillus thuringiensis

Document Type

Article

Publication Date

2-1-2005

Abstract

1 Larval survival and development of Dipel-susceptible and -resistant strains of European corn borer, Ostrinia nubilalis (Hübner), were assayed using diets incorporating low doses of a commercial formulation of Bacillus thuringiensis var. kurstaki Berliner (Dipel ES). 2 Larval mortality, growth and development, pupation rate and pupal weight were not significantly different between Dipel-susceptible and -resistant strains when larvae were reared on a nontoxic control diet. 3 Larval mortality of Dipel-resistant larvae did not significantly change as Dipel concentration increased at the tested concentrations, whereas mortality of Dipel-susceptible larvae increased dramatically as Dipel concentration increased. 4 Larval development was significantly delayed when larvae were fed diets containing low doses of Dipel. 5 Pupation rate and pupal body weight declined as Dipel concentration increased but it decreased faster for the susceptible strain than for the resistant strain.

Publication Source (Journal or Book title)

Agricultural and Forest Entomology

First Page

45

Last Page

52

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