DISSIPATION AND HARVEST TIME RESIDUES OF FOLIAR APPLIED FLONICAMID 15% + FIPRONIL 15% WDG ON PADDY

P. AMBILY¹*, T. GEORGE^2
1AINP on Pesticide Residues, College of Agriculture, Kerala Agricultural University, Vellayani, Thiruvananthapuram, 695 522, Kerala, India
²AINP on Pesticide Residues, College of Agriculture, Kerala Agricultural University, Vellayani, Thiruvananthapuram, 695 522, Kerala, India
* Corresponding Author : ambilypaul7@gmail.com

Received : 04-04-2020     Accepted : 28-04-2020     Published : 30-04-2020
Volume : 12     Issue : 8       Pages : 9760 - 9763
Int J Agr Sci 12.8 (2020):9760-9763

Keywords : Rice, Dissipation, Residues, Flonicamid, Fipronil, Half life
Academic Editor : Bayu Dwi Apri Nugroho
Conflict of Interest : None declared
Acknowledgements/Funding : The authors are grateful to AINP on Pesticide Residues, College of Agriculture, Vellayani and Kerala Agricultural University, Vellayani, Thiruvananthapuram, 695 522, Kerala, India, for providing necessary research facilities and financial support for conduct of the present study.
Author Contribution : All authors equally contributed

The study on residue and dissipation of flonicamid and fipronil after foliar application of flonicamid 15% + fipronil 15% WDG on rice plant after 2 applications at 15 days interval with the first coinciding with the tillering stage @ 400 g ha-1 and 800 g ha-1 was conducted at Integrated Farming System Research Station, Kerala Agricultural University, Karamana, Thiruvananthapuram, Kerala. The residues of flonicamid and fipronil were estimated using LCMS/MS. The mean initial deposit of flonicamid at recommended and double the recommended dose were 0.39 and 0.82 mg kg-1, respectively. The residue dissipated with time and reached below limit of quantification of 0.05 mg kg-1 within 3 days in the recommended dose and within 5 days in double the recommended dose. The mean initial deposit of fipronil at recommended and double the recommended dose were 2.70 and 3.60 mg kg-1, respectively. The residue dissipated with time and reached below limit of quantification of 0.01 mg kg-1 within 10 days both in the recommended and double the recommended dose. However, the harvest time residues of flonicamid and fipronil were below limit of quantification in paddy grain, straw, husk and soil.

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