Search PubMed for references concerning: Triazamate
Title: Field-simulator studies of insecticide resistance to dimethylcarbamates and pyrethroids conferred by metabolic- and target site-based mechanisms in peach-potato aphids, Myzus persicae (Hemiptera: Aphididae) Foster SP, Denholm I, Devonshire AL Ref: Pest Manag Sci, 58:811, 2002 : PubMed
A range of insecticides was applied at recommended application rates against populations of Myzus persicae (Sulzer) carrying various combinations of three insecticide resistance mechanisms (carboxylesterase-based metabolic resistance and two target-site mechanisms, known as MACE and kdr), supported on either Chinese cabbage or potatoes in field simulator cages. Patterns of response were similar on both host species. MACE conferred extreme resistance to pirimicarb and triazamate (dimethylcarbamate insecticides). The kdr mechanism was associated with resistance to lambda-cyhalothrin, cypermethrin and deltamethrin (pyrethroid insecticides). A mixture of pirimicarb plus lambda-cyhalothrin was only effective against M persicae not carrying kdr or carrying kdr and low carboxylesterase-based resistance. None of the insecticides tested was effective against M persicae carrying both MACE and kdr resistance. The implications of these findings for the formulation of control strategies, based on regular monitoring of resistance genotype frequencies, are discussed.
Title: Aphicide persistence on spinach and mustard greens Sweeden MB, McLeod PJ Ref: J Econ Entomol, 90:195, 1997 : PubMed
Laboratory bioassays with green peach aphids, Myzus persicae (Sulzer), were conducted on samples from field grown spinach and mustard greens to determine the persistence of triazamate, dimethoate, and mevinphos. Treatment with each insecticide resulted in similar mortality initially on both crops. Mortality on samples from mevinphos treated plants declined considerably by 1 d after treatment. Dimethoate persisted for > 4 d at a level that would kill at least some aphids during the allotted time. Persistence of triazamate and dimethoate activities were similar on spinach. Triazamate, however, resulted in greater aphid mortality through time on mustard greens than did dimethoate.
Title: Insecticide-Insensitive Acetylcholinesterase Can Enhance Esterase-Based Resistance in Myzus persicae and Myzus nicotianae Moores GD, Devine GJ, Devonshire AL Ref: Pesticide Biochemistry and Physiology, 49:114, 1994 : PubMed
The acetylcholinesterase in some resistant strains of Myzus persicae and its extremely close relative Myzus nicotianae showed marked insensitivity to inhibition by the established carbamate pirimicarb (>100-fold) and by triazamate, a novel triazole aphicide (>10-fold), that acts on the same target. There was no insensitivity to a range of other carbamate and organophosphorus insecticides. This resistance mechanism appears to be rare at present and was only found in a heterozygous form associated with the commonly occurring elevated E4/FE4 esterases that confer broad cross-resistance to many aphicides. This insensitive target site mechanism, even when heterozygous, enhances the esterase-based resistance to pirimicarb and triazamate by 15- to 30-fold.
