Resistance monitoring in codling moth: a need for standardization

Pest Management Science
Maritza Reyes, B Sauphanor

Abstract

A wide range of methods has been used for monitoring resistance in Cydia pomonella L. However, the results from specific tests are not always concordant and they generate doubts over the extent to which the data represent the field situation. Therefore, the variability in the expression of resistance mechanisms and in resistance ratios between developmental stages and their reliability in a field situation were studied. Neonate larvae showed the highest insecticide resistance, except to spinosad. Resistance ratios were from 2 to 9.5, depending on the insecticide and the strain tested, when compared with the susceptible strain. Spinosad exhibited the highest resistance ratio for diapausing larvae (4.4, 12.2 and 4.4 for Raz, Rdfb and RDelta strains, respectively). Enzymatic ratios were higher in adults than in neonates or diapausing larvae, and the highest enzymatic ratios were observed for mixed-function oxidases (7.3-36.7 for adults of resistant strains). The sensitivity of different instars depends on the insecticides used, and there is a differential expression of resistance mechanisms between stages. For the population considered in this study, tests on neonates provided the most consistent results to the field situation, bu...Continue Reading

References

Jul 1, 1972·Hoppe-Seyler's Zeitschrift für physiologische Chemie·V Ullrich, P Weber
Sep 17, 2002·Archives of Insect Biochemistry and Physiology·Jean-Charles BouvierBenoît Sauphanor
Mar 18, 2004·Pest Management Science·Denis Pasquier, Pierre-Joseph Charmillot
Apr 3, 2004·Evolution; International Journal of Organic Evolution·Denis BourguetMichel Raymond
Sep 21, 2004·Archives of Insect Biochemistry and Physiology·Haim Reuveny, Ephraim Cohen
Mar 22, 2006·Pest Management Science·Thomas Van LeeuwenLuc Tirry

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Citations

Jul 8, 2015·Frontiers in Plant Science·Myriam SiegwartMiguel Lopez-Ferber
Mar 18, 2015·Bulletin of Entomological Research·X-Q Yang, Y-L Zhang
Oct 16, 2015·Journal of Economic Entomology·Maritza ReyesEduardo Fuentes-Contreras
Feb 28, 2020·Journal of Economic Entomology·Lino Bittencourt MonteiroHelena C Silva de Assis

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