Safe use of carbendazim in GAP of Atractylodes macrocephala.
- Author:
Jian LIN
1
;
Houdao WEI
;
Tianyu WANG
;
Jialun WU
;
Jian XUE
Author Information
- Publication Type:Journal Article
- MeSH: Agriculture; methods; Atractylodes; chemistry; drug effects; Benzimidazoles; analysis; pharmacology; Carbamates; analysis; pharmacology; Drug Residues; analysis; pharmacology; Fungicides, Industrial; analysis; pharmacology; Plant Roots; chemistry; drug effects; Quality Control; Soil; analysis
- From: China Journal of Chinese Materia Medica 2010;35(13):1674-1678
- CountryChina
- Language:Chinese
-
Abstract:
OBJECTIVETo study the residue of in roots of Atractylodes macrocephalal and in soil.
METHODSamples were extracted with methanol. The extracts were cleaned up by liquid-liquid extraction and detected by HPLC.
RESULTRepeatability and accuracy of the method was verified by fortified recovery at 0.01, 0.05, 0.1, 0.2 mg x kg(-1) levels. Average recovery were 86.1%-98.3% and RSD were 1.0%-6.5% in root and soil. A. macrocephala was treated with two dosage of carbendazim during growing. Results of field test showed that the half lives of carbendazim were 6.51-7.98 d in cultivated soil, 4.51-6.50 d in roots, separately. After sample was preliminarily processed, the residue of dried samples was 0.042-0.433 mg x kg(-1), higher than the fresh samples.
CONCLUSIONIf 0.2 mg x kg(-1) is recommended as the MRL (maximum residues limited) of carbendazim in the roots of A. macrocephala, it is suggested that the dose of 0.675 kg a.i. x hm(-1) carbendazim is sprayed twice a year, and carbendazim should not be used within 21 days before the harvest.
