Behavioral and physiological responses of susceptible and resistant diamondback moth larvae to Bacillus thuringiensis

J. M. Schwartz, B. E. Tabashnik, M. W. Johnson

Research output: Contribution to journalArticle

27 Scopus citations

Abstract

To determine whether field‐selected resistance of diamondback moth (Plutella xylostella L.) (Lepidoptera: Plutellidae) to Bacillus thuringiensis is based on behavioral or physiological adaptation, we measured mortality, consumption, and movement of larvae from a susceptible and a resistant colony when placed on untreated and B. thuringiensis treated cabbage. Colonies did not differ in mortality, consumption, or movement on untreated cabbage. However, for a given amount of consumption of treated cabbage, resistant larvae had lower mortality than susceptible larvae, demonstrating that resistance had a physiological basis. The movement patterns could not account for the differences between colonies in survival. Resistant larvae did not avoid B. thuringiensis more than did susceptible larvae. Thus, we found no evidence for behavioral resistance. 1991 The Netherlands Entomological Society

Original languageEnglish (US)
Pages (from-to)179-187
Number of pages9
JournalEntomologia Experimentalis et Applicata
Volume61
Issue number2
DOIs
StatePublished - Nov 1991

Keywords

  • Bacillus thuringiensis
  • Mechanism of resistance
  • Plutellidae
  • diamondback moth

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Insect Science

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