author(s)
C Vijayaraghavan and Zadda Kavitha

abstract
During kharif 2016 and rabi 2016-17, two field trials were conducted at National Pulses Research Centre, Tamil Nadu Agricultural University, Vamban to evaluate some newer insecticidal molecules against whitefly, Bemisia tabaci in blackgram. The treatments included seed treatment with imidacloprid 600 FS @ 5 g/kg seed, thiamethoxam 25 WG @ 0.2 g/lit, thiamethoxam 25 WG @ 0.3 g/lit, acetamiprid 20 SP @ 0.2 g/lit, acetamiprid 20 SP @ 0.3 g/lit, clothionidin 50 WDG @ 0.05 g/lit, clothionidin 50 WDG @ 0.1 g/lit, triazophos 40 EC @ 1 lit/ha, novaluron 10 EC @ 1 ml/ lit, buprofezin 25 SC @1 ml/ lit and untreated control. In blackgram, whitefly population will be more during the vegetative stage so, a spray was given with the test insecticides at 20 days after sowing and pretreatment and post treatment counts were taken. The results of the two season trials concluded that clothionidin 50 WDG @ 0.1 g/l was effective in reducing the population of whiteflies in blackgram followed by thiamethoxam 25 WG @ 0.2 g/l.