ISSN:
1570-7458
Keywords:
Mechanism of resistance
;
diamondback moth
;
Plutellidae
;
Bacillus thuringiensis
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
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.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00191748
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