author(s)
Purnima Das, Rana Pratap Bhuyan, Uddipana Shandilya, Binita Borah and Bikash Jyoti Gharphalia

abstract
A field experiment was conducted in the Experimental Garden for Plantation Crops, Assam Agricultural University, Jorhat-13 during 2016 and 2017 to evaluate the bio-efficacy of Sulfoxaflor 50% WG against the tea mosquito bug and green fly in tea. Six treatments at different doses, along with an untreated control, were used in the experiment. Results revealed that during 2016, Sulfoxaflor 50% WG @ 150 g ha^-1 recorded significantly least twig infestation (1.0%) in case of tea mosquito bug, and least number of green fly population per leaf (0.50), as compared to the other insecticidal treatments, at 15 days, after the third spray. Thiamethoxam 25% WG @ 100 g ha^-1, Clothianidin 50% WDG @ 120 g ha^-1 and Sulfoxaflor 50% WG @ 100 and 120 g ha^-1 were the next effective treatments and were at par with each other in their efficacies. During 2017, Sulfoxaflor 50% WG @ 150 g ha^-1, at 15 days after the third spray showed similar result of least twig infestation (0.25% of TMB) and less population of green fly (0.25/leaf) as compared to the other treatments.