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P-ISSN: 2349-8528, E-ISSN: 2321-4902   |   Impact Factor: GIF: 0.565 NAAS Rating: 5.31 NEW

International Journal of Chemical Studies

Vol. 5, Issue 3 (2017)
Effect of certain indigenous extracts against tea mosquito bug, Helopeltis theivora (Waterhouse) (Hemiptera: Miridae) in tea


Author(s): Kapil Kumar Bhuyan, Gautam Kumar Saikia, Mukul Kumar Deka, Bithika Phukan and Subhash Chandra Barua

Abstract: An investigation entitled “Effect of certain indigenous extracts against tea mosquito bug, Helopeltis theivora (Waterhouse) (Hemiptera: Miridae) in Tea” was carried out at Deha Tea Estate, Jorhat, Assam, India during 2015-2016 by using different indigenous extracts. Fish extract at (0.25, 0.5 and 1) %, Polygonum hydropiper at (2.5, 5 and 7.5) % and Azadirachtin-5% (Neemazal-F) were evaluated in field condition against tea mosquito bug. The result showed that fish extract in combination with cow dung, cow urine and water when sprayed at 1% concentration and Polygonum hydropiper in combination with cow urine and water when sprayed at 7.5% concentration significantly reduced the percentage of shoots infested by tea mosquito bug. Both Fish extract and Polygonum hydropiper extract combinations were found to increase plucking point density and yield of tea. Among all the ITKs, fish extract at 1% caused higher reduction of infestation of tea mosquito bug followed by Polygonum hydropiper extract at 7.5%. Influence of both the treatments on the management of tea mosquito bug was at par with that of commercial Azadirachtin (5%).

Pages: 158-162  |  716 Views  22 Downloads

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How to cite this article:
Kapil Kumar Bhuyan, Gautam Kumar Saikia, Mukul Kumar Deka, Bithika Phukan, Subhash Chandra Barua. Effect of certain indigenous extracts against tea mosquito bug, Helopeltis theivora (Waterhouse) (Hemiptera: Miridae) in tea. Int J Chem Stud 2017;5(3):158-162.
International Journal of Chemical Studies