Journal of Applied Entomology (2013) 137, 641-649

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A. Schmitt, I.L. Bisutti, E. Ladurner, M. Benuzzi, B. Sauphanor, J. Kienzle, D. Zingg, K. Undorf-Spahn, E. Fritsch, J. Huber and J.A. Jehle (2013)
The occurrence and distribution of resistance of codling moth to Cydia pomonella granulovirus in Europe
Journal of Applied Entomology 137 (9), 641-649
Abstract: Thirty-five codling moth (CM, Cydia pomonella L., Lepidoptera, Tortricidae) populations collected in different commercial orchards in six European countries were tested for their susceptibility to Cydia pomonella granulovirus (CpGV-M). Including previously published data on CpGV-M resistance, a total of 38 CM colonies showed considerably elevated LC50 values, independent of the country origin. When only few test individuals are available, determination of mortality of neonate larvae at a discriminating concentration range of 104 to 106 OB/ml (>log4) as a direct measure of percentage susceptible individuals in a CM population is more advisable than calculation of LC50 values. The >log4 mortality alone or in combination with the LC50 value can be used for identification of resistance in a population. Results indicated a locally separated but widely spread occurrence of CM populations with low susceptibility to CpGV-M. The most plausible hypothesis for the emergence of CpGV-M resistance is its selection by repeated use of CpGV products.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Annegret Schmitt, Jürg Huber, Johannes A. Jehle

Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
resistance/tolerance/defence of host


Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.


Cydia pomonella
Cydia pomonella granulovirus (entomopathogen) Cydia pomonella