Control of the European peach scale Parthenolecanium persicae (Fabricius, 1776) (Hemiptera: Coccidae) in vineyards.
The efficacy of dimethoate (Tiomet 400 EC at 100 ml/100 litre), fenitrothion (Sumithion 500 EC at 150 ml/100 litre), methidathion (Supracid 400 CE at 100 ml/100 litre), parathion-methyl (Folidol 600 EC at 100 ml/100 litre) and trichlorfon (Dipterex 500 SNAqC at 300 ml/100 litre) in 2001, and imidacloprid (Provado 200 SC at 30, 40 and 50 ml/100 litre), thiacloprid (Calypso 480 SC at 20, 30 and 40 ml/100 litre), thiamethoxam (Actara 250 WG at 20, 30 and 40 g/100 litre) and parathion-methyl (Folidol 600 CE at 100 ml/100 litre) in 2002 to control P. persicae in vineyards was investigated in a field experiment in Monte Belo do Sul, Rio Grande do Sul, Brazil. The insecticides were sprayed using 800 litre of water/ha seeking third instar nymphs. Fenitrothion, methidathion, parathion-methyl, trichlorfon, imidacloprid and thiamethoxam were efficient for P. persicae control. Dimethoate and thiacloprid reduced pest population levels below 50%.