Field Efficacy of some Combination Insecticide Formulations against Paddy Planthoppers

Comparative field efficacy of certain insecticide combination formulations with their sole insecticidal treatments is reported against rice planthoppers [brown (BPH) and white backed (WBPH)] during kharif 2016. The plots treated with fipronil 5 per cent + buprofezin 20 per cent SC @ 62.5+250 g a.i. ha⁻¹ recorded the lowest number of BPH population (3.83 and 2.61 per 5 hills) in the first and second insecticidal sprays, respectively, followed by indoxacarb 10 per cent + thiamethoxam 10 per cent WG @ 50 + 50 g a.i. ha⁻¹ (4.81 and 3.45 per 5 hills, respectively). The sole treatments of thiamethoxam 25WG @ 25 g a.i. ha⁻¹ and buprofezin 25WG @ 50 g a.i. ha⁻¹ performed as the third and fourth best treatments, respectively. The WBPH population was low in plots treated with fipronil + buprofezin EC (2.95 and 2.60 per 5 hills) after the first and second insecticidal sprays, respectively, followed by indoxacarb + thiamethoxam WG (3.83 and 3.36 per 5 hills, respectively). The highest population was recorded in untreated control. The highest per cent yield over control was recorded in fipronil + buprofezin EC treated plot (47.84), followed by indoxacarb + thiamethoxam 10 WG (44.88).