Fitness costs of resistance to Bacillus thuringiensis in Colorado potato beetle (Coleoptera: Chrysomelidae)

We compared fitness components of a Bacillus thuringiensis CryIIIA delta-endotoxin resistant and susceptible strains of Colorado potato beetle, Leptinotarsa decemlineata (Say). The resistant strain had been selected for 35 generations, and the resistance ratio was 700-fold compared with the suscepti...

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Bibliographic Details
Published in:Journal of economic entomology 1997-04, Vol.90 (2), p.267-271
Main Authors: Trisyono, A. (University of Missouri, Columbia.), Whalon, M.E
Format: Article
Language:English
Subjects:
BACILLUS THURINGIENSIS
Biological and medical sciences
Biological control
BIOLOGICAL DEVELOPMENT
Chrysomelidae
Control
CONTROL DE INSECTOS
CRYIIIA
CRYSTAL PROTEINS
DESARROLLO BIOLOGICO
DEVELOPPEMENT BIOLOGIQUE
ENDOTOXINAS
ENDOTOXINE
ENDOTOXINS
FECUNDITY
FERTILIDAD
FERTILITE
FERTILITY
Fundamental and applied biological sciences. Psychology
INSECT CONTROL
INSECTICIDAS
INSECTICIDE
INSECTICIDES
LARVAE
LARVAS
LARVE
LEPTINOTARSA DECEMLINEATA
LUTTE ANTIINSECTE
OVA
OVIPOSICION
OVIPOSITION
OVULE
OVULO
Phytopathology. Animal pests. Plant and forest protection
PONTE
PROTEINAS
PROTEINE
PROTEINS
Protozoa. Invertebrates
RESISTANCE AUX PRODUITS CHIMIQUES
RESISTANCE COST
RESISTANCE TO CHEMICALS
RESISTENCIA A PRODUCTOS QUIMICOS
SELECCION
SELECTION
SELECTION PRESSURE
VIABILIDAD
VIABILITE
VIABILITY
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Summary:We compared fitness components of a Bacillus thuringiensis CryIIIA delta-endotoxin resistant and susceptible strains of Colorado potato beetle, Leptinotarsa decemlineata (Say). The resistant strain had been selected for 35 generations, and the resistance ratio was 700-fold compared with the susceptible strain. The F36 of both strains was used in this study. We found that the viability of eggs produced by resistant and susceptible females were high (97.8 +/- 3.7 and 98.3 +/- 2.9%, respectively), but eggs of the resistant strain tended to have longer viability than that of the susceptible strain (5.7 +/- 0.3 and 5.2 +/- 0.2 d, respectively). Slower larval development was associated with resistance to CryIIIA delta-endotoxin in Colorado potato beetle. In addition, resistant females produced 60% fewer eggs than susceptible females. The resistant females also exhibited a shorter oviposition period and fewer eggs per egg mass (16.3 +/- 2.4 versus 27.8 +/- 11.3). These results are discussed together with various resistance management strategies for Colorado potato beetle controlled by conventional B. thuringiensis sprays and transgenic plants
ISSN:0022-0493
1938-291X
DOI:10.1093/jee/90.2.267