Bioefficacy of abamectin, chlorantraniprole and emamectin benzoate against tobacco caterpillar, Spodoptera litura (Fab.)

摘要

Bioefficacy of abamectin (0.1, 0.09, 0.08, 0.07 and 0.06%) and emamectin benzoate (0.04, 0.009, 0.006 and 0.002%) was examined against 10d old larvae of S. litura by leaf dip bioassay method. Emamectin benzoate proved to be more toxic than abamectin with the LC_(30), LC_(50) and LC_(90) values of 0.001, 0.007 and 0.45% respectively at 12 hours after exposure (HAE). At 24 HAE the LC_(50) value of emamectin benzoate and abamectin were 0.002 and 0.02% respectively. Emamectin benzoate showed 10 times more toxicity than abamectin at LC_(50) and was quick in causing mortality than abamectin.