Thiamethoxam seed coating on rape seed for the control of cabbage aphid Brevicoryne brassicae (L)

Abstract

A glasshouse and a field experiment were conducted to determine the efficacy of thiamethoxam as a seed treatment on forage brassica for the control of aphids Cabbage aphid (Brevicoryne brassicae L) survival and reproductive rates were measured from rape plants (Brassica napus spp biennis cv Emerald) grown in both experiments The seed was treated with four different thiamethoxam rates (1 2 4 and 8 g ai/kg) and compared to the registered rate of imidacloprid (144 g ai/kg) and untreated seed over time Six weeks after sowing only thiamethoxam at 8 g ai/kg and imidacloprid at 144 g ai/kg had significantly lower (P