International Journal of Plant Protection

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Dissipation and Decontamination of Imidacloprid and Lambda - Cyhalothrin Residues in Brinjal


Affiliations
1 Department of Entomology, Rajendra Agricultural University, Pusa, Samastipur (Bihar), India
     

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Residues ofimidacloprid at 20 g a.i. ha-1 and lambda - cyhalothrin at 15 g a.i. ha-1 were estimated quantitatively by HPLC/GLC in/on brinjal fruits. Initial deposits of insecticides were higher in imidacloprid than lambda - cyhalothrin. Initial deposits of 0.652 mg kg-1 of imidacloprid dissipated to 93.17 per cent on 10th day. In lambda - cyhalothrin the initial deposits were 0.138 mg kg-1 which dissipated to 92.75 per cent on 10th day. The degradation of imidacloprid was relatively higher as compared to lambda - cyhalothrin. Both imidacloprid and lambda - cyhalothrin had half - life values of 1.92 and 2.65 days, respectively on brinjal fruits. The safe waiting period for imidacloprid was found 4.70 days. In lambda - cyhalothrin, no waiting period is required after its application as the initial deposits were less than its MRL (0.3 mg kg-1).

Keywords

Dissipation, Decontamination, Imidacloprid, Lambda - Cyhalothrin, Brinjal.
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  • Dissipation and Decontamination of Imidacloprid and Lambda - Cyhalothrin Residues in Brinjal

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Authors

S. P. Gupta
Department of Entomology, Rajendra Agricultural University, Pusa, Samastipur (Bihar), India
S. P. Singh
Department of Entomology, Rajendra Agricultural University, Pusa, Samastipur (Bihar), India
Paidi Satyanarayana
Department of Entomology, Rajendra Agricultural University, Pusa, Samastipur (Bihar), India
Nagendra Kumar
Department of Entomology, Rajendra Agricultural University, Pusa, Samastipur (Bihar), India

Abstract


Residues ofimidacloprid at 20 g a.i. ha-1 and lambda - cyhalothrin at 15 g a.i. ha-1 were estimated quantitatively by HPLC/GLC in/on brinjal fruits. Initial deposits of insecticides were higher in imidacloprid than lambda - cyhalothrin. Initial deposits of 0.652 mg kg-1 of imidacloprid dissipated to 93.17 per cent on 10th day. In lambda - cyhalothrin the initial deposits were 0.138 mg kg-1 which dissipated to 92.75 per cent on 10th day. The degradation of imidacloprid was relatively higher as compared to lambda - cyhalothrin. Both imidacloprid and lambda - cyhalothrin had half - life values of 1.92 and 2.65 days, respectively on brinjal fruits. The safe waiting period for imidacloprid was found 4.70 days. In lambda - cyhalothrin, no waiting period is required after its application as the initial deposits were less than its MRL (0.3 mg kg-1).

Keywords


Dissipation, Decontamination, Imidacloprid, Lambda - Cyhalothrin, Brinjal.

References