International Journal of Environment and Climate Change

The investigation was carried out at Samajik Vigyan Kendra, Dr. B.R. Ambedkar University, Bordi, Sehore (M.P.)-INDIA during kharif 2018-19. To assess the impact of  insecticidal spray on leaf curling caused due to sucking pest and phytotoxic effect of higher doses of insecticides in chilli.The bio-efficacy of three different insecticides, namely (i) Chlorfenapyr 240 SC - spray four time with different-different doses, (ii) Fipronil 5% SC and (iii) Imidacloprid 17.8 SL. One untreated plot was also used to   investigate against leaf curl and  phytotoxic effect on chilli. Among these insecticides, Chlorfenapyr 240SC doses 288 g.a.i/hac (gram active ingredient per hactare) has least leaf curl indications (9.68%). It’s most effective  insecticides in chilli. The least impact  of leaf curl recorded in treatment T4- (9.68%) followed by T3- chlorofenapyr (11.88%),T5- Fipronil 5% SC (14.46%), T6- Imidacloprid (16.68%),  T2- chlorofenapyr (17.69%) and the most elevated twisting  in T7- untreated control (56.29). Further, the  phytotoxic effect of treatment T1 - chlorfenapyr and T2 - chlorfenapyr were connected contrasting and T3 - untreated control. In these tried portions no phytotoxic impact likes chlorosis, Epinasty, Necrosis, Scorching , wilting and hyponasty were seen at various interim of perceptions against Chilli crop. The chilli yield was also noted highest in highest dose of T4 (16.0 tonnes ha^-1) followed by second highest dose of T3 (15.4 tonnes ha^-1), however, it was recorded lowest in untreated control (8.0 tonnes ha^-1). The C:B benefit ratio was noted higher in T5- fipronil 5% SC@ 10 g.a.i ha^-1 (3.20) followed by T6- imidacloprid 17.8 SL @ 50 g.a.i ha^-1 (2.99).