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Fitness costs of resistance to Bacillus thuringiensis in the Indianmeal moth, Plodia interpunctella
Author(s) -
Oppert Brenda,
Hammel Richard,
Throne James E.,
Kramer Karl J.
Publication year - 2000
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 - 10.1046/j.1570-7458.2000.00707.x
Subject(s) - plodia interpunctella , biology , bacillus thuringiensis , pyralidae , pesticide resistance , lepidoptera genitalia , insecticide resistance , toxicology , resistance (ecology) , botany , pesticide , agronomy , bacteria , genetics
Genetic changes in insects that result in insecticide resistance can also affect their fitness. Here, we report measurements of development time and survival of the Indianmeal moth, Plodia interpunctella (Hübner), to compare the relative fitness of Bacillus thuringiensis (Bt)‐susceptible and ‐resistant colonies. Measurements of larval development time and survival indicated that a fitness cost was associated with resistance to Bt in some Bt‐resistant colonies but not others. Comparisons of geographically different populations revealed inherent differences in development time and survival. In most cases, Bt‐resistant moths suffered no disadvantage when feeding on a Bt‐treated diet. In many cases, the development of Bt‐resistant moths on Bt‐treated diet was slower than the unselected moths on untreated diet, but it is unclear whether these differences would affect the successful mating of susceptible and resistant moths.