Field evaluation of Bt 127 SC formulation against Spodoptera litura (F.) in soybean


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Field evaluation of Bt 127 SC formulation against Spodoptera litura (F.) in soybean

Authors

  • R CHANNAKESHAVA AICRP on Soybean, MARS, University of Agricultural Sciences, Dharwad-580 005, Karnataka
  • SANGSHETTY AICRP on Soybean, MARS, University of Agricultural Sciences, Dharwad-580 005, Karnataka
  • G SOMANAGOUDA AICRP on Soybean, MARS, University of Agricultural Sciences, Dharwad-580 005, Karnataka
  • SHALINI N HUILGOL AICRP on Soybean, MARS, University of Agricultural Sciences, Dharwad-580 005, Karnataka
  • G T BASAVARAJA AICRP on Soybean, MARS, University of Agricultural Sciences, Dharwad-580 005, Karnataka
  • C J KUMAR AICRP on Soybean, MARS, University of Agricultural Sciences, Dharwad-580 005, Karnataka

https://doi.org/10.56739/jor.v37iSpecialissue.141083

Keywords:

Bio-efficacy, Bt 127 SC, Spodoptera litura, Soybean

Abstract

Bt 127 SC formulation was field tested against Spodoptera litura larvae infesting soybean at Dharwad. Among
the biopesticides, Bt 127 SC formulation @ 3 ml/l of water has proved to be significantly superior over commercial Bt formulation Delfin and untreated control and recorded lowest S. litura after both the sprays. There was a higher reduction in larval population on the seventh day after treatment both in Bt 127 SC formulation (0.54 l/mrl) and Bt commercial Delfin (0.75 l/mrl) treated plots as bacterial infection starts to manifest leading to high mortality of larva within 3-5 days after treatment. Soybean seed yield due to treatment by Bt 127 SC formulation (1733 kg/ha) and Bt commercial Delfin (1694 kg/ha) were on par but lower in comparison to the broad spectrum chemical insecticides that are effective against different orders of insects. There was negligible population of natural enemies in the plots before and after the treatments.

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References

Murali Krishna T, Devaki K, Swarna B, Abhijit N and Naresh M 2018. Computation of LC50 against Spodoptera litura

(Fab.) for Bacillus thuringiensis isolates from native soil samples of Andhra Pradesh. Journal of Pharmacognosy and Phytochemistry, 7(4): 174-178.

Singh O P and Singh K J 1990. Insect pest of soybean and their management. India Farming, 39: 9-14.

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Submitted

2023-08-18

Published

2020-03-12

Issue

Vol. 37 No. Specialissue (2020): Journal of Oilseeds Research

Section

Articles

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The Journal of Oilseeds Research reserves all the copy rights of the published articles and prior permission is to be taken from the journal office if any part of the published articles is to be reproduced in any form in any other publication.

How to Cite

R CHANNAKESHAVA, SANGSHETTY, G SOMANAGOUDA, SHALINI N HUILGOL, G T BASAVARAJA, & C J KUMAR. (2020). Field evaluation of Bt 127 SC formulation against Spodoptera litura (F.) in soybean: Field evaluation of Bt 127 SC formulation against Spodoptera litura (F.) in soybean. Journal of Oilseeds Research, 37(Specialissue). https://doi.org/10.56739/jor.v37iSpecialissue.141083