Toxicity of Seven Acaricides to Teranychid and Phytoseiid Mites in Apple Orchards and Under Laboratory Conditions

Document Type : Original research articles

Authors

1 Lattakia Center for Natural Enemies Rearing, Syria

2 Department of Plant Protection, Faculty of Agriculture, Tishreen University, Lattakia, Syria.

Abstract

The toxicity of seven acaricides (abamectin,  amitraz, azocyclotin, fenbutatin  oxide, propargite, pyrimidifin and spirodiclofen)  to  Tetranychus urticae Koch, Panonychus ulmi Koch (Acari:  Tetranychidae) and the  predatory phytoseiid mites (Neoseiulus  fallacis  German and  Typhlodromus cotoneastri  Wainstein) was evaluated in  both laboratory and apple orchards in two different sites on the Syrian Coast (Shakrieh- Lattakia and Premmant El-Masheik-Tartous). All tested acaricides were highly toxic to  T.urticae and P.ulmi, except spirodiclofen, which was slightly to moderately toxic after lday, and moderately to highly toxic after 7 days in field. For the phytoseiid mites; amitraz, azocyclotin and pyrimidifin were highly toxic  in  laboratory  and field,  abamectin was moderately toxic  in  both laboratory  and field,  fenbutatin  oxide was moderately toxic  in  laboratory  and non-toxic in  field,  propargite was moderately toxic in laboratory and slightly toxic in field, and spirodiclofen was slightly toxic in laboratory and non toxic in field.

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