Journal of Economic Entomology (1996) 89, 1354-1358

Anastasia Tsagkarakou, Maria Navajas, Jacques Lagnel, Jean Gutierrez and Nicole Pasteur (1996)
Genetic variability in Tetranychus urticae (Acari: Tetranychidae) from Greece: Insecticide resistance and isozymes
Journal of Economic Entomology 89 (6), 1354-1358
Abstract: Resistance to methyl-parathion, methidathion, and methomyl was studied by bioassays in Tetranychus urticae Koch from Greece. At LC₅₀, the resistance ratio was highly variable with methidathion (5- to 63-fold) and with methomyl (6- to 34-fold). The mortality curves with methyl-parathion showed a clear plateau at ~20% mortality, and the resistance ratio was ~50 fold at LC₅₀ in all samples. By using isoelectric focusing on cellulose acetate membranes; electrophoretic studies of 5 loci encoding esterases (Est-1 and Est-2), glucose-phosphate isomerase (Gpi), malic enzyme (Me), and phosphoglucomutase (Pgm) disclosed large genetic differences among the samples.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Database assignments for author(s): Maria Navajas, Anastasia Tsagkarakou

Research topic(s) for pests/diseases/weeds:
pesticide resistance of pest

---

Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Tetranychus urticae		Greece