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Determination of the baseline susceptibility of European populations of Cydia pomonella (Lepidoptera: Tortricidae) to chlorantraniliprole and the role of cytochrome P450 monooxygenases

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Issue date
2018-02-01
Author
Bosch Serra, Dolors
Rodríguez García, Marcela
Depalo, Laura
Avilla Hernández, Jesús
Suggested citation
Bosch Serra, Dolors; Rodríguez García, Marcela; Depalo, Laura; Avilla Hernández, Jesús; . (2018) . Determination of the baseline susceptibility of European populations of Cydia pomonella (Lepidoptera: Tortricidae) to chlorantraniliprole and the role of cytochrome P450 monooxygenases. Journal of Economic Entomology, 2018, vol. 111, núm. 2, p. 844-852. https://doi.org/10.1093/jee/toy020.
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Abstract
The codling moth, Cydia pomonella (L.) (Lepidoptera: Tortricidae), is the key pest on pome fruit and walnut orchards worldwide. Its resistance to available insecticides has been widely reported. Chlorantraniliprole is an anthranilic diamide that was introduced in European countries in 2008-2009 and acts by activating the insect's ryanodine receptors. The aims of this study were to determine the baseline susceptibility of European populations of C. pomonella to chlorantraniliprole, to establish the discriminant concentrations (DC) to check the possible development of resistance, and to know the role of cytochrome P450 monooxygenases (P450) in the possible susceptibility decrease of field populations to the insecticide. Ten field populations from Spain along with others were used to calculate the baseline response of larvae to chlorantraniliprole incorporated into the diet. A pooled probit line was calculated, and three DC were established: 0.3 mg a.i./kg (close to the LC50), 1.0 mg a.i./kg (close to the LC90), and 10 mg a.i./kg diets (threefold the LC99). The DC were used to test the susceptibility of 27 field populations from France, Germany, Hungary, Italy, and Spain. The corrected mortality observed in all cases ranged within the expected interval, even with Spanish populations that showed between 12.1 and 100.0% of individuals with high P450 activity. However, the mortality caused by the DC0.3 decreased as the mean P450 activity increased. Field populations resistant to other insecticides were susceptible to chlorantraniliprole. The determined baseline codling moth susceptibility is a valuable reference for tracking possible future alterations in the efficacy of the insecticide.
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http://hdl.handle.net/10459.1/62657
DOI
https://doi.org/10.1093/jee/toy020
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Journal of Economic Entomology, 2018, vol. 111, núm. 2, p. 844-852
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