Effects of Insecticide and Metarhizium anisopliae Combinations Against Leptocorisa Acuta

Authors

  • Bimal Kumar Sahoo Department of Agricultural Entomology, Centre for Plant Protection Studies, Tamil Nadu Agricultural University, Coimbatore 641003, Tamil Nadu
  • Mahesh Pathak School of Crop Protection, College of Post Graduate Studies in Agricultural Sciences, Central Agricultural University (Imphal), Umiam 793103, Meghalaya
  • Malsawmtluanga Hnialum Department of Agricultural Entomology, Centre for Plant Protection Studies, Tamil Nadu Agricultural University, Coimbatore 641003, Tamil Nadu
  • Hia Kalita Department of Molecular, Cellular and Developmental Biology, IOWA State University, IOWA- 50014
  • Sikha Haritha School of Crop Protection, College of Post Graduate Studies in Agricultural Sciences, Central Agricultural University (Imphal), Umiam 793103, Meghalaya
  • Kennedy Ningthoujam School of Crop Protection, College of Post Graduate Studies in Agricultural Sciences, Central Agricultural University (Imphal), Umiam 793103, Meghalaya
  • Pranab Dutta School of Crop Protection, College of Post Graduate Studies in Agricultural Sciences, Central Agricultural University (Imphal), Umiam 793103, Meghalaya
  • Raghubir Kumar Patidar School of Crop Protection, College of Post Graduate Studies in Agricultural Sciences, Central Agricultural University (Imphal), Umiam 793103, Meghalaya
  • N S Azad Thakur School of Crop Protection, College of Post Graduate Studies in Agricultural Sciences, Central Agricultural University (Imphal), Umiam 793103, Meghalaya

DOI:

https://doi.org/10.55446/IJE.2024.1984

Keywords:

Insecticides, entomopathogen, imidacloprid, thiamethoxam, pymetrozyne, Metarhizium anisopliae, benefit-cost ratio, mortality, recommended dose, rice, combination

Abstract

This study evaluated the effects of combining the entomopathogen green muscardine fungus Metarhizium anisopliae (Metchnikoff) with three compatible chemical insecticides (imidacloprid, thiamethoxam, and pymetrozine) against the rice gundhi bug Leptocorisa acuta (Thunberg) in rice under field conditions. The results revealed that among the various treatments, imidacloprid exhibited the most promising results, leading to a bioefficacy of 71.13% followed by imidacloprid (half-dose) + M. anisopliae combination, which achieved a bioefficacy of 63.95% in the field over two consecutive seasons. The highest reduction in L. acuta population over control was observed in the imidacloprid (69.73%) followed by M. anisopliae + pymetrozine (half-dose) (65.79%). In terms of rice grain yield, imidacloprid again outperformed other treatments with a yield of 41.98 q ha-1 with a benefit-cost ratio of 2.57 followed by the imidacloprid (half-dose) + M. anisopliae combination, which yielded 41.61 q ha-1 with B:C ratio of 2.42.

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Published

2024-10-08

How to Cite

Sahoo, B. K., Pathak, M., Hnialum, M., Kalita, H., Haritha, S., Ningthoujam, K., … Azad Thakur, N. S. (2024). Effects of Insecticide and <i>Metarhizium anisopliae</i> Combinations Against Leptocorisa Acuta. Indian Journal of Entomology. https://doi.org/10.55446/IJE.2024.1984

Issue

Online First

Section

Research Articles
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Europe PMC

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