Residue, dissipation, and safety evaluation of pyridalyl nanoformulation in Okra (Abelmoschus esculentus [L] Moench)

  • Priya Saini
  • Madhuban Gopal
  • Rajesh Kumar
  • Robin Gogoi
Article
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Abstract

A comparative study on residues and rate of dissipation of a new nanoformulation of pyridalyl and commercial pyridalyl was carried out on okra under net house and field conditions. Okra crop was sprayed with commercial and nanoformulation of pyridalyl at recommended (75 g a. i./ha) and double the recommended dose (150 g a. i./ha) at the time of fruiting. Quantitation of residues of pyridalyl in okra was done by ultra high performance liquid chromatography over a period of 15 days, and recovery of the method ranged from 79 to 87 %. The half life calculated from the dissipation pattern of pyridalyl on okra for commercial and developed nanoformulation proved that residues of nanopyridalyl did not persist much longer than that of conventional formulation in net house as well as in field trials. The risk quotient value of pyridalyl in okra was significantly lower than 1, implying its negligible risk to the humans.

Keywords

Pyridalyl Nanoformulation Half life Recovery UHPLC Risk assessment 
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Notes

Acknowledgments

The authors thank the Heads of Division of Agricultural Chemicals, Division of Vegetables Sciences and Division of Plant Pathology, Indian Agricultural Research Institute, New Delhi for facilitating the work. One of us (PS) acknowledges the grant received from PG school of IARI, New Delhi.

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Copyright information

© Springer International Publishing Switzerland 2015

Authors and Affiliations

  • Priya Saini
    • 1
  • Madhuban Gopal
    • 1
  • Rajesh Kumar
    • 1
  • Robin Gogoi
    • 2
  1. 1.Division of Agricultural ChemicalsIndian Agricultural Research InstituteNew DelhiIndia
  2. 2.Division of Plant PathologyIndian Agricultural Research InstituteNew DelhiIndia

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