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Behavioral and physiological responses of susceptible and resistant diamondback moth larvae to Bacillus thuringiensis
Author(s) -
Schwartz J. M.,
Tabashnik B. E.,
Johnson M. W.
Publication year - 1991
Publication title -
entomologia experimentalis et applicata
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.765
H-Index - 83
eISSN - 1570-7458
pISSN - 0013-8703
DOI - 10.1111/j.1570-7458.1991.tb02410.x
Subject(s) - diamondback moth , plutellidae , bacillus thuringiensis , plutella , biology , lepidoptera genitalia , larva , pest analysis , zoology , toxicology , botany , bacteria , genetics
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.