EFFICACY OF NEW-CHEMISTRY INSECTICIDES AGAINST WHITEFLY AND APHIDS IN POTATO

Abstract

The efficacy of new-chemistry insecticides viz., dinotefuran, diafenthiuron, flupyradifurone and pymetrozine
was evaluated against whitefly, Bemisia tabaci and the peach-potato aphid, Myzus persicae in separate trials. Against
whitefly adults, diafenthiuron 50 WP @ 0.08% and @ 0.1%, and pymetrozine 50 WG @ 0.06% and 0.08% performed best
till 14 DAT with over 80% reduction in whitefly incidence. Against the peach-potato aphids, Flupyradifurone 200 SL @
0.1%, diafenthiuron 50 WP @ 0.06% and 0.08% and pymetrozine 50 WG @ 0.04%, 0.06% and 0.08% performed on a par and
reduced the aphid incidence by more than 80% throughout the period. Consequent incidence of viruses was also found
lowest for the respective treatments. Therefore, diafenthiuron 50 WP @ 0.08% and pymetrozine 50 WG @ 0.06% can be used
for the management of whiteflies, and flupyradifurone 200 SL @ 0.1%, diafenthiuron 50 WP @ 0.06% and pymetrozine 50
WG @ 0.04% can be used for the management of peach-potato aphids in potato crops.