Bio-efficacy of Novel Acaricides against Bean Spider Mite, Tetranychus ludeni Zacher on Cowpea, (Vigna unguiculata L.)

Authors

  • Singampalli Prasanthi Dept. of Entomology, Dr. Rajendra Prasad Central Agricultural University, Pusa, Bihar (848 125), India
  • G. Balraj Dept. of Entomology, Dr. Rajendra Prasad Central Agricultural University, Pusa, Bihar (848 125), India
  • Dharanikota Lalithambica Devi Dept. of Entomology, Dr. Rajendra Prasad Central Agricultural University, Pusa, Bihar (848 125), India
  • Arshi Zeba Dept. of Entomology, G.B.P.U.A.T., Pantnagar, Uttarakhand (263 145), India
  • Sajiya Quadri Dept. of entomology, Odisha University of Agriculture and Technology, Odisha (751 003), India
  • Surendra Prasad Dept. of Entomology, Dr. Rajendra Prasad Central Agricultural University, Pusa, Bihar (848 125), India

DOI:

https://doi.org/10.23910/2/2026.6860b

Keywords:

Abamectin, benefit cost ratio, bio-efficacy, cowpea

Abstract

A Field experiment was conducted during summer (April–July), 2024 at vegetable research farm, Hi-Tech Horticulture, RPCAU, Pusa to evaluate bio-efficacy and economics of new generation acaricides against cowpea bean spider mite, Tetranychus ludeni. The experiment was organized using Randomized Block Design with seven treatments including an untreated control, replicated three times. Two foliar sprays were applied 15days after infestation reaching economic threshold level, recorded mite population density one day prior to spraying, 1, 3, 7 and 14 days after each spray application. The results after the first spray indicated that Abamectin 1.9 EC had the greatest efficacy mean (9.29 mites leaf-1) followed by Fenpyroximate 5 EC (11.08 mites leaf-1) and Bifenazate 50 WP (12.62 mites leaf-1) compared to the untreated control (44.93 mites leaf-1). Similar results were observed after the second spray application, as Abamectin 1.9 EC showed the maximum efficacy with a mean mite count of 0.64 mites leaf-1 followed by Fenpyroximate 5 EC (2.49 mites leaf-1) and Bifenazate 50 WP (2.69 mites leaf-1). In case of yield and B:C ratio, Abamectin 1.9 EC recorded the highest pod yield and B:C ratio (13.013 t ha-1 & 4.75:1 respectively). This was followed by Fenpyroximate 5 EC (12.234 t ha-1 & 4.05:1) and Bifenazate 50 WP (11.587 t ha-1 & 3.94:1),  Propargite 57 EC (107.48 t ha-1 and 3.84:1 ), Chlorfenapyr 10 SC (10.126 t ha-1 and 3.38:1), Hexythiazox 5.45 EC (9.280 t ha-1 and 3.20:1) compared to untreated control (7.733 t ha-1 and 2.71:1).

Downloads

Published

09-03-2026

How to Cite

Prasanthi, S., Balraj, G., Devi, D. L., Zeba, A., Quadri, S., & Prasad, S. (2026). Bio-efficacy of Novel Acaricides against Bean Spider Mite, Tetranychus ludeni Zacher on Cowpea, (Vigna unguiculata L.). International Journal of Economic Plants, 13(Mar, 2), 01–05. https://doi.org/10.23910/2/2026.6860b

Issue

Vol. 13 No. Mar, 2 (2026)

Section

Articles

License

Copyright (c) 2026 PP House

Creative Commons License

This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.

Articles published are made available as open access articles, distributed under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License, which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original author and source are credited. Creative Commons License

This journal permits and encourages authors to share their submitted versions (preprints), accepted versions (postprints) and/or published versions (publisher versions) freely under the CC BY-NC-SA 4.0 license while providing bibliographic details that credit, if applicable.