A theoretical study of discriminating parameters in metabolic resistance to insecticides

• Published in: Pesticide Science 1998-04, Vol.52 (4), p.354-360
• Main Authors: Chalvet-Monfray, Karine, Belzunces, Luc P., Auger, Pierre
• Format: Article
• Language: English
• Subjects: Biological and medical sciences; Chemical control; Control; Fundamental and applied biological sciences. Psychology; insecticide; mathematical modelling; metabolism; pharmacokinetics; Phytopathology. Animal pests. Plant and forest protection; Protozoa. Invertebrates; resistance
• ISSN: 0031-613X; 1526-498X; 1096-9063
• DOI: 10.1002/(SICI)1096-9063(199804)52:4<354::AID-PS728>3.0.CO;2-6

In the case where resistance to an insecticide is associated with increased metabolism of the insecticide, it should not be concluded that the resistance is due only to the increased metabolism (i.e. metabolic hypothesis). Here, we study theoretically the pharmacokinetic consequences of a resistance mechanism due to increased metabolism. We consider two cases: treatment with the initial dose D0 applied to the susceptible strain and the treatment with the initial dose αD0, with α>1, applied to the resistant strain. We show the conditions for which the metabolism hypothesis is conceivable. The time τ, from which the mortality of the susceptible strain is significantly higher than that of the resistant strain, is an important parameter in determining the validity of the metabolic hypothesis. The more τ increases, the more the conditions are favourable to this hypothesis. Our work suggests an approach to test the metabolic hypothesis from experimental results. © 1998 SCI