Oil Based Formulation of Beauveria bassiana (BB 112) Against Onion Thrips Thrips tabaci Lindeman

Authors

  • Murugasridevi K. Department of Agricultural Entomology, Centre for Plant Protection Studies, Tamil Nadu Agricultural University, Coimbatore 641003, Tamil Nadu
  • S. Jeyarani Department of Agricultural Entomology, Centre for Plant Protection Studies, Tamil Nadu Agricultural University, Coimbatore 641003, Tamil Nadu
  • K. Ramaraju Department of Agricultural Entomology, Centre for Plant Protection Studies, Tamil Nadu Agricultural University, Coimbatore 641003, Tamil Nadu
  • S. Mohan Kumar Centre for Plant Molecular Biology and Biotechnology, Tamil Nadu Agricultural University, Coimbatore 641003, Tamil Nadu

DOI:

https://doi.org/10.55446/IJE.2021.20

Keywords:

Onion, Thrips tabaci, Beauveria bassiana, oil-based formulation, Bb 112, pathogenicity, delivery techniques, infectivity, persistence, CDA sprayer, LC50 , LT50 , bulb yield

Abstract

Successful usage of entomopathogenic fungi for pest control under field conditions includes delivery techniques, infectivity and persistence of their inoculum in the environment. Pathogenicity tests performed with oil-based formulation of Beauveria bassiana (Bals.) Vuill (Bb 112) against onion thrips Thrips tabaci Lindeman revealed maximum virulence with the least LC50 and LT50 values of 1.25 x 105 spores/ml and 76.11 hr, respectively. Microplot trials showed oil-based formulation of Bb 112 was effective against T. tabaci when sprayed with Controlled Droplet Applicator (CDA) sprayer giving maximum cumulative reduction of 54.04%. Field experiments revealed oil-based formulation of Bb 112 @ 108 spores ml/l applied with CDA sprayer led to maximum cumulative reduction in thrips incidence (44.69 and 41.01%, respectively), at Kumarapalayam village, Coimbatore and Ambilikkai village, Dindigul districts. In addition, maximum onion yield of 14.66 and 16.23 t/ha was observed at Kumarapalayam and Ambilikkai, respectively. Mycoinsecticides applied with the CDA sprayer can be incorporated in management of T. tabaci.

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Published

2021-09-30

How to Cite

K., M., Jeyarani, S., Ramaraju, K., & Kumar, S. M. . (2021). Oil Based Formulation of <i>Beauveria bassiana</i> (BB 112) Against Onion Thrips <i>Thrips tabaci</i> Lindeman. Indian Journal of Entomology, 84(2), 268–273. https://doi.org/10.55446/IJE.2021.20

Issue

Volume 84, Issue 2, June 2022

Section

Research Articles
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