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Litoriya NS, Chauhan NR, Kalasariya RL, Parmar KD, Chawla S, Parmar AV, Raj PV, Shah PG. Dissipation kinetics of co-formulation with two herbicides, clodinafop-propargyl and oxyfluorfen, in/on onion (Allium cepa) samples. Environ Sci Pollut Res Int 2023; 30:50225-50233. [PMID: 36790701 DOI: 10.1007/s11356-023-25785-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2022] [Accepted: 02/03/2023] [Indexed: 04/16/2023]
Abstract
Supervised field trail on dissipation of co-formulation with herbicides clodinafop-propargyl and oxyfluorfen in spring onion showed similar pattern of dissipation during two different seasons. Residues of clodinafop-propargyl reached ≤ limit of quantitation (LOQ, 0.05 mg kg-1) on 3rd day after application at both standard and double dose during both the seasons. Oxyfluorfen residues followed first-order kinetics in both the doses during first season with half-life of 0.81 to 3.14 days. The residues of clodinafop-propargyl were detected in soil at both the doses during first season. However, residues were ≤ LOQ (0.05 mg kg-1) during second season. The residues of oxyfluorfen were detected only in double dose during first season in soil. In all other cases and in onion bulb, residues were ≤ LOQ (0.05 mg kg-1) at the time of harvest. As the residues were either ≤ LOQ (0.05 mg kg-1) on 3rd day or have a half-life of 3.14 days, the co-formulation can be used safely, provided a pre harvest interval (PHI) of 3 days is followed. On the basis of maximum residue limits (MRLs) in other commodities and from the data of present study, a default MRL of 0.05 mg kg-1 is proposed for both the pesticides.
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Affiliation(s)
- Nitesh S Litoriya
- AINP On Pesticide Residues, ICAR Unit-9, Anand Agricultural University, Anand, Gujarat, India
- Main Forage Research Station, Anand Agricultural University, Anand, Gujarat, India
| | - Nirmal R Chauhan
- AINP On Pesticide Residues, ICAR Unit-9, Anand Agricultural University, Anand, Gujarat, India
| | - Ravi L Kalasariya
- AINP On Pesticide Residues, ICAR Unit-9, Anand Agricultural University, Anand, Gujarat, India
| | - Kaushik D Parmar
- AINP On Pesticide Residues, ICAR Unit-9, Anand Agricultural University, Anand, Gujarat, India
| | - Suchi Chawla
- AINP On Pesticide Residues, ICAR Unit-9, Anand Agricultural University, Anand, Gujarat, India.
| | - Ambalal V Parmar
- AINP On Pesticide Residues, ICAR Unit-9, Anand Agricultural University, Anand, Gujarat, India
| | - Pratik V Raj
- AINP On Pesticide Residues, ICAR Unit-9, Anand Agricultural University, Anand, Gujarat, India
| | - Paresh G Shah
- AINP On Pesticide Residues, ICAR Unit-9, Anand Agricultural University, Anand, Gujarat, India
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