2011•Yaowu fenxi zazhiRequires access
Residue trend of imidacloprid in fruits of Citrus grandis
Shilin Chen
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Abstract
Objective:To study on residue trend of imidacloprid in fruits of Citrus grandis.Methods:It was examined by high performance liquid chromatography(HPLC) after trunk injection.Results:The residue of imidacloprid remained a low period in fruits of C.grandis after injection with 0.8 mL·cm-1 diluted of imidacloprid.When the trunk was injected with 1.5 mL·cm-1 diluted of imidacloprid,the residue level of imidacloprid in fruits increased on the 7th day immediately.And the peak level was detected on the 14th day after the treatment.The level of imidacloprid in fruits was 0.835 mg·kg-1 in the 30th day,which was lower than MRLs(1 mg·kg-1).Conclusions:When imidacloprid through trunk injection was applied to control bore pests of C.grandis,which was diluted with 1.5 mL·cm-1,the safe interval period was more than 30 d.