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Journal of Agriculture ›› 2021, Vol. 11 ›› Issue (1): 62-66.doi: 10.11923/j.issn.2095-4050.cjas2020-0162

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Determination of Etoxazole and Acetamiprid Residue in Citrus maxima ‘Guanxi miyou’ and Effect of Bagging on Residues

Hu Yuxian()   

  1. Zhangzhou Agricultural Test and Inspection Centre, Zhangzhou 363000, Fujian, China
  • Received:2020-08-06 Revised:2020-10-20 Online:2021-01-20 Published:2021-02-05

Abstract:

To evaluate the safety of etoxazole and acetamiprid in Citrus maxima ‘Guanxi miyou’ and the effect of bagging on residues, a study on the residual degradation dynamics of etoxazole and acetamiprid was carried out. A field experiment was conducted on Citrus maxima ‘Guanxi miyou’, two dosages were sprayed in bagging and non-bagging treatments, and then the residue was determined by QuEChERS combining with HPLC-MS/MS. The results showed that the residual degradation dynamics of etoxazole and acetamiprid followed the first-order kinetic equation, the half-life (T1/2) of etoxazole was 5.30-5.47 d in the bagging treatment, and 4.34-4.54 d in the non-bagging. T1/2 of acetamiprid was 3.42-3.80 d in the bagging treatment, and 3.04-3.70 d in the non-bagging. T1/2 of etoxazole was a little longer in the bagging treatment, but the T1/2 of acetamiprid had no obvious difference between the bagging and non-bagging treatment. The residues of etoxazole and acetamiprid in Citrus maxima ‘Guanxi miyou’ were not detected on the 65th day after spraying.

Key words: Etoxazole, Acetamiprid, Citrus maxima ‘Guanxi miyou’, Residue, Bagging

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