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Determination of Thermal Constant and Development Threshold of Fruit and Shoot Borer, Earias vitella (F.)

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Abstract

Effect of constant temperatures viz, 18 ± 1, 21 ± 1, 24 ± 1, 27 ± 1, 30 ± 1 and 33 ± 1 °C on egg, larval and pupal development of Earias vitella revealed that the development rate of egg, larvae and pupae gradually increased with increase in temperature, while total development period decreased. Mean developmental period of the pest decreased from 58.7 days at 18 ± 1 °C to 22.4 days at 33 ± 1 °C. Thermal constant for egg, larva (I–V instar) and pupa were determined to be 50, 50, 62.5, 52.6, 58.8, 62.5 and 142.8 degree days (DD), respectively with corresponding development threshold being 11.4, 10.7, 8.0, 9.7, 8.3, 8.0 and 10.5 °C. Thermal constant to complete a generation was found to be 479.2 DD.

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Acknowledgments

The authors acknowledge Department of Science and Technology, Government of India, New Delhi for providing financial assistance in the form of INSPIRE Junior Research Fellowship and Chairman, Department of Plant Protection, Aligarh Muslim University for providing facilities to conduct the present study.

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Authors and Affiliations

  1. Department of Plant Protection, Faculty of Agricultural Sciences, Aligarh Muslim University, Aligarh, 202002, India

    Uzma Manzoor & Masarrat Haseeb

  2. Division of Entomology, Indian Agricultural Research Institute, New Delhi, 110012, India

    Subhash Chander

Authors
  1. Uzma Manzoor
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  2. Masarrat Haseeb
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  3. Subhash Chander
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Correspondence to Masarrat Haseeb.

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Manzoor, U., Haseeb, M. & Chander, S. Determination of Thermal Constant and Development Threshold of Fruit and Shoot Borer, Earias vitella (F.). Natl. Acad. Sci. Lett. 39, 81–84 (2016). https://doi.org/10.1007/s40009-016-0426-4

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  • DOI: https://doi.org/10.1007/s40009-016-0426-4

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