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1 April 2001 Genotypic Variability and Mode of Action of Colorado Potato Beetle (Coleoptera: Chrysomelidae) Resistance in Seven Solanum Species
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Abstract

Accessions from seven wild Solanum species were evaluated in the field for resistance to the Colorado potato beetle, Leptinotarsa decemlineata (Say). The multivariate insect population density data were analyzed using factor analysis. The factors extracted corresponded to relevant phases of the insect’s life cycle and provided information on the mode of resistance (antixenosis and antibiosis) of the plant species. S. berthaultii, S. capsicibaccatum, S. jamesii, S. pinnatisectum, and S. trifidum demonstrated both antixenosis and antibiosis but expressed different levels of resistance. The mode of resistance of S. polyadenium seemed to be antibiosis and that of S. tarijense antixenosis. Genetic variability and heritability of insect resistance traits within accessions was trivial or inconsistent for all Solanum species studied.

Y. Pelletier and G. C C. Tai "Genotypic Variability and Mode of Action of Colorado Potato Beetle (Coleoptera: Chrysomelidae) Resistance in Seven Solanum Species," Journal of Economic Entomology 94(2), (1 April 2001). https://doi.org/10.1603/0022-0493-94.2.572
Received: 17 May 2000; Accepted: 1 December 2000; Published: 1 April 2001
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