Insecticidal compositions and methods

A - Human Necessities – 01 – N

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A01N 43/90 (2006.01)

Patent

CA 2271747

An insecticidal composition comprising a first insecticidally active ingredient, to which insect pests have developed a degree of resistance, an insecticidally inert carrier or diluent and, optionally, one or more surface active agents, characterised in that the composition further contains a sufficient amount of a compound of formula (I), wherein A represents a bidentate group of formula -CH2CH2- or CH=CH; Ar is phenyl, pyridinyl, pyridazinyl or pyrazinyl, all being optionally substituted with halogen, C1-4 alkyl, C1-4 alkoxy, C2-4 alkenyl, C2-4 alkynyl or cyano; R is hydrogen, C1-4 alkyl (optionally substituted with cyano, CO2(C1-4 alkyl) or phenyl (itself optionally substituted with halogen, C1-4 alkyl, C1-4 alkoxy, C1-4 haloalkyl or C1-4 haloalkoxy)), C2-4 haloalkyl (the .alpha.-carbon being unsubstituted), C3-4 alkenyl or C3-4 alkynyl; provided that when R is alkenyl or alkynyl said group does not have an unsaturated carbon atom bonding directly to the ring nitrogen of formula (I); or an acid addition salt, quaternary ammonium salt or <u>N</u>-oxide derived therefrom; to boost the activity of the composition to overcome the resistance of the insect pests; and a method of using such a composition to combat insect pests.

La présente invention concerne une composition insecticide contenant un premier ingrédient insecticide actif auquel des insectes nuisibles ont développé un certain degré de résistance, un excipient ou diluant insecticide inerte et, éventuellement, un ou plusieurs agents tensioactifs, pour renforcer l'activité de la composition pour vaincre la résistance des insectes nuisibles. Ladite composition se caractérise par le fait qu'elle contient une dose suffisante d'un composé de la formule (I) dans laquelle A représente un groupe bidenté de la formule -CH¿2?-CH¿2?- ou CH=CH; Ar est phényle, pyridinyle, pyridazinyle ou pyrazinyle, lesdits éléments étant tous éventuellement substitués par halogène, alkyle C¿1-4?, alcoxy C¿1-4?, alcényle C¿2-4?, alkynyle C¿2-4? ou cyano; R est hydrogène, alkyle C¿1-4? (éventuellement substitué par cyano, CO¿2?(alkyle C¿1-4?) ou phényle (lui-même éventuellement substitué par halogène, alkyle C¿1-4?, alcoxy C¿1-4?, haloalkyle C¿1-4? ou haloalcoxy C¿1-4?)), haloalkyle C¿2-4? (le carbone-alpha étant insubstitué), alcényle C¿3-4? ou alkynyle C¿3-4?; à condition que, si R est alcényle ou alkynyle, ledit groupe ne contienne pas un atome de carbone insaturé lié directement à l'azote cyclique de la formule (I); ou un sel d'addition d'acide, un sel d'ammonium quaternaire ou un <u>N</u>-oxyde dérivé dudit sel. L'invention concerne également un procédé d'utilisation de ladite composition pour lutter contre les insectes nuisibles.

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