ABSTRACT
Tomato leaf curl begomovirus and its vector whitaefly (Bemisia tabaci) are the major limiting factors, which cause substantial yield loss in tomato. Present investigations on Invitro efficacy of new insecticide molecules on whitefly mortality and leaf curl virus transmission revealed that adult mortality varies with the length of incubation period of different insecticides, as increase in the concentration of insecticides, adult mortality was more in the initial hrs of incubation. Among the test chemicals, cyantraniliprole 10 OD at 60 and 75 g.a.i/ha have knockdown effect and caused 100 per cent mortality at 48 hrs after treatments and also recorded least virus transmission (10 and 5 % respectively). Whiteflies remained active and caused 100 per cent transmission of leaf curl virus in the untreated check. The incidence of B. tabaci and tomato leaf curl virus disease (disease inoculums) was stastically varied with respect to different dose of insecticides evaluated at two different levels of observation. Among the different concentrations of new molecule cyantraniliprole (Cyazypyr 10 OD) (45, 60 and 75 g.a.i/ha) tested, cyantraniliprole 10 OD at 60 and 75 g.a.i/ha. were found more effect in reducing both whitefly and disease incidence at first and final observation with the least whitefly population and leaf curl disease incidence. Correspondingly the yields were high in plot received cyantraniliprole 10 OD 75 g.a.i/ha (32.5tons/ha) and significantly superior over the standard check triazophos (23.5tons/ha.) followed by cyantraniliprole 10 OD at 60 g.a.i/ha (29.2 tons/ha) and cyantraniliprole 10 OD at 45 g.a.i/ha (27.4 tons/ha).