Evaluation of linear and nonlinear models for temperature driven development of Spodoptera litura (Fabricius) on soybean crop

Authors

  • Y.G. PRASAD ICAR-Central Institute for Cotton Research (CICR), Nagpur
  • M. GAYATHRI ICAR-Central Research Institute for Dryland Agriculture, Hyderabad
  • V. SAILAJA Forest College and Research Institute, Osmania University, Mulugu
  • M. PRABHAKAR ICAR-CRIDA, Hyderabad, India
  • G.RAMACHANDRA RAO ICAR-CRIDA, Hyderabad, India
  • G. REKHA ICAR-CRIDA, Hyderabad, India
  • S. VENNILA ICAR-National Research Centre for Integrated Pest Management, New Delhi

DOI:

https://doi.org/10.54386/jam.v23i2.63

Keywords:

Spodoptera litura, threshold temperatures, degree days, phenology model

Abstract

The tobacco caterpillar, Spodoptera litura, a major pest of soybean in India is under surveillance in all soybean growing areas in Maharashtra in order to issue alerts to farmers and prevent economic losses. In this context, two linear models were fitted to developmental data of S. litura life stages reared on soybean at five constant temperatures viz. 15, 20, 25, 30 and 35°C through laboratory experiments. Optimum temperature for development (Topt) and upper temperature threshold (Tmax) were estimated from three nonlinear models by additionally including developmental response at >35°C. Topt estimates for the total immature development were 34.5°C (Lactin-2), 33.7°C (Briere-1) and 33.2°C (Simplified Beta type function) while Tmax estimates were in the range of 38 to 40°C. Application of a thermodynamic non-linear model (Optim SSI) gave estimate ofintrinsic optimum temperature (Tφ) for development of egg (28.3°C), larva (27.5°C) and pupal stage (30.3°C). The phenology model of S. litura on soybean based on estimated developmental threshold temperatures and thermal constants was validated using available field surveillance data to facilitate informed pest management decisions.

Downloads

Published

01-06-2021

How to Cite

Y.G. PRASAD, M. GAYATHRI, V. SAILAJA, M. PRABHAKAR, G.RAMACHANDRA RAO, G. REKHA, & S. VENNILA. (2021). Evaluation of linear and nonlinear models for temperature driven development of Spodoptera litura (Fabricius) on soybean crop. Journal of Agrometeorology, 23(2), 169–175. https://doi.org/10.54386/jam.v23i2.63

Issue

Vol. 23 No. 2 (2021): June

Section

Research Paper

License

Creative Commons License

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

This is a human-readable summary of (and not a substitute for) the license. Disclaimer.

You are free to:

Share — copy and redistribute the material in any medium or format

Adapt — remix, transform, and build upon the material

The licensor cannot revoke these freedoms as long as you follow the license terms.

    Under the following terms:

    Attribution — You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.

    NonCommercial — You may not use the material for commercial purposes.

    ShareAlike — If you remix, transform, or build upon the material, you must distribute your contributions under the same license as the original.

    No additional restrictions — You may not apply legal terms or technological measures that legally restrict others from doing anything the license permits.

    Notices:

    You do not have to comply with the license for elements of the material in the public domain or where your use is permitted by an applicable exception or limitation.

    No warranties are given. The license may not give you all of the permissions necessary for your intended use. For example, other rights such as publicity, privacy, or moral rights may limit how you use the material.