Zahra Gholami - Department of Plant Protection, Faculty of Agriculture, University of Kurdistan, Sanandaj, Iran.
Amin Sadeghi - Department of Plant Protection, Faculty of Agriculture, University of Kurdistan, Sanandaj, Iran.
Aziz Sheikhi Garjan - Department of Agricultural Entomology Research, Iranian Research Institute of Plant Protection, Tehran, Iran.
Javad Nazemi Rafi - Department of Plant Protection, Faculty of Agriculture, University of Kurdistan, Sanandaj, Iran.
Fatemeh Gholami - Department of Plant Protection, Faculty of Agriculture, University of Mohaghegh Ardabili, Ardabil, Iran.

This study was conducted to investigate commercial formulations of insecticides against western flower thrips, Frankliniella occidentalis (Pergande).The insects were collected from commercial greenhouses of cucumber in Varamin, Iran. The tested insecticides were diazinon (EC ۶۰%), cypermethrin (EC ۴۰%), fipronil (EC ۲.۵%), imidacloprid (SC ۳۵%) and a botanical insecticide oxymatrine (Kingbo, AS ۰.۶%). Fipronil had the highest efficacy among all tested insecticides (LC۵۰ = ۱۷.۹۷ ppm). However, imidacloprid had the lowest efficacy (LC۵۰ = ۲۳۰۳ ppm). The oxymatrine was effective (LC۵۰ = ۶۹.۹۴ ppm) after fipronil.

bioassay, Insecticides, Frankliniella occidentalis, fipronil, oxymatrine