In vitro Bio Efficacy of Botanicals against Tea Mosquito bug, Helopeltis theivora Waterhouse in Tea

Author: R. Ranjithkumar*, M. Kalaynasundaram, M. Kannan, J.S. Kennedy, C.R. Chinnamuthu and P. Paramaguru

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Abstract

Bio-efficacy of botanicals against the Tea mosquito bug (TMB) in Tea was evaluated at the R&D center, Parry Agro Industries Limited, Valparai, Coimbatore, Tamil Nadu. In laboratory condition, using cold extraction method some botanicals were extract and using for bioassay. Among all the treatments tested, Calophyllum inophyllum seed oil after 72 hours after treatment treated tea shoots had less number of feeding punctures (304.67 Nos) and a maximum of 98.25% adult mortality followed by Pongamia pinnata seed oil showed 272.00 Nos feeding puncture and 94.74% mortality, Azadirachtin 10000 ppm, 283.00 feeding puncture and 84.21% mortality, Madhuca longifolia seed oil 2% showed 289.00 feeding puncture and 80.70% mortality, extracts of Vitex negundo leaf extract 5%, 301.67 feeding puncture and 70.18% mortality and extracts of Clerodendrum viscosum leaf extract 2%, 304.67 feeding puncture and 70.18% mortality, Fish Oil Rosin Soap showed 382.33 feeding puncture and 24.56% mortality. The feedin

Keywords

Bioefficacy, Botanicals, Tea, Tea mosquito bug and sucking pests.

Conclusion

The present studies conclude that the application of Calophyllum inophyllum seed oil @ 20ml/lit. followed by Pongamia pinnata seed oil @ 20ml/lit, in rotation effectively control H. theivora in tea. Thus Pongamia pinnata seed oil @ 20ml/lit was recommended for widespread application to successfully manage the tea mosquito bug in different tea plantations.

References

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How to cite this article

R. Ranjithkumar, M. Kalaynasundaram, M. Kannan, J.S. Kennedy, C.R. Chinnamuthu and P. Paramaguru (2022). In vitro Bio Efficacy of Botanicals against Tea Mosquito bug, Helopeltis theivora Waterhouse in Tea. Biological Forum – An International Journal, 14