O. P. AMETAAND A. K. JAIN

The bio efficacy of NC-129 (20% WP) at 250, 375, 500, 625 g/ha along with Acetamiprid 20% SP at 100 g/ha and Imidacloprid 17.8% SL at 125 ml/ha was evaluated against whitefly in cotton for two crop seasons, kharif 2013 and 2014. The trial was conducted in a RBD at Instructional farm of Rajasthan College of Agriculture, Udaipur. The population of whitefly was brought below ETL with two spray during kharif  2013 and 2014 with different dosages of the new chemicals. Among different treatments tested, NC-129 (20% WP) at 625 g/ha caused maximum reduction in population of whitefly with 72.42, 95.99 ; 71.44 and 96.73 percent at 15 days after first and second spray during kharif  2013 and 2014, respectively. It was at par with NC-129 (20% WP) at 500 g/ha. Significantly highest seed cotton yield of 26.80 q/ha (2013) and 24.60 q/ha (2014) was harvested with higher dosage of NC-129 (20% WP) at 625 g/ha followed
by the dosage at 500 g/ha.