Turkish Journal of Agriculture and Forestry (2005) 29, 165-171

Recep Ay, Elvan Sökeli, Ismail Karaca and M. Oktay Gürkan (2005)
Response to some acaricides of the two-spotted spider mite (Tetranychus urticae Koch) from protected vegetables in Isparta
Turkish Journal of Agriculture and Forestry 29 (3), 165-171
Abstract: he two-spotted spider mite, Tetranychus urticae Koch, was tested for susceptibility to various acaricides, propargite (Omite) 570 g l^-1, amitraz (Kortraz) 200 g l^-1 and abamectin (Agrimec) 18 g l^-1. Propargite, a selective acaricide, has been used to control T. urticae in many crops in Turkey. Amitraz and abamectin have acaricidal and insecticidal properties, and are thus used to control spider mites and some vegetable pests (e.g., whiteflies and Liriomyza spp.). Five different T. urticae populations collected from vegetable greenhouses in Isparta and their responses to those acaricides were investigated by leaf dip assay and compared with those of a susceptible reference strain. Resistance ratios for the chemicals ranged from <1.00 to 2.5 for propargite, 1.2 to 2.1 for amitraz and <1.0 to 2.9 for abamectin (based on LC₅₀). Since the greenhouses around Isparta province where the two-spotted spider mite populations were collected have recently been constructed, the populations used in this study were not exposed to excessive acaricides and had had no important loss of susceptibility to the acaricides applied in the study. However, it was observed that the growers used pesticides haphazardly.
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Database assignments for author(s): Recep Ay

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

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Tetranychus urticae	Tomato (Solanum lycopersicum)	Turkey
	Tetranychus urticae	Beans (Phaseolus)	Turkey