Sami Publishing Company (SPC) Journal of Research in Weed Science 2651-4699 Articles in Press 2023 08 21 Acaricidal and Ovicidal effects of two common weeds of tea gardens of North Bengal, India against Oligonychus coffeae 40 49 177579 10.26655/JRWEEDSCI.2023.6.5 EN Arnab Sen University of North Bengal Sandipan Ghosh University of North Bengal Soumyadip Sengupta University of North Bengal Gargi Sen University of North Bengal Chandra Ghosh University of North Bengal Journal Article 2023 05 23 Tea is regarded as one of the most significant and affordable beverages consumed in more than 65 nations throughout the world. Its productivity is at risk because of the various pests infecting the tea plants. Among these, Mite pests in tea are highly damaging, tenacious, and difficult to eradicate. Oligonychus coffeae or Red spider mites are the most prevalent causing huge loss to the tea industry. The control measures using chemical pesticides have a negative impact on the quality of tea and make it unfit for human consumption. In this context, floral diversity can be explored for the effective control of pests. The present study envisages the comparative analysis of pesticidal efficacy of two common weeds in the tea garden of the Terai and Dooars region of North Bengal, India.The aqueous extracts of Justicia adhatoda and Polygonum hydropiper (L.) as biocide employed in this study demonstrated substantial acaricidal and oviposition deterrent action against the tea Red Spider Mite Oligonychus coffeae after 48 hours of application. The results of this study showed that aqueous extracts of the above-mentioned plans are promising biocontrol agents against the tea red spider mite Oligonychus coffeae. This aqueous extract may have the potential to be an effective acaricide in the future at a reasonably low cost.

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