Strain of Leptinotarsa decemlineata resistant to Bacillus thuringiensis
In the USA, a first report has been published which records the occurrence of a strain of Leptinotarsa decemlineata (EPPO A2 quarantine pest) resistant to the endotoxin of Bacillus thuringiensis var. san diego or tenebrionis. Colorado beetles were selected in the laboratory after exposure to potato fields in Michigan (US). After 12 generations of selection, the selected strain was 59 times more resistant than the unselected strain. Based on these results the authors suggest that resistance management strategies should be developed and deployed for both conventionally applied B. thuringiensis products and B. thuringiensis transgenic plants.
This item has been available in INFOEPPO since 1993-05-24!
Sources
Whalon, M.E.; Miller, D.L.; Hollingworth; R.M.; Grafius, E.J.; Miller, J.R. (1993) Selection of a Colorado potato beetle (Coleoptera: Chrysomelidae) strain resistant to Bacillus thuringiensis.
Journal of Economic Entomology 86, 226-266..D.