Bulletin of Environmental Contamination and Toxicology 2013-04-01

Uniconazole residue and decline in wheat and soil under field application.

Fengzu Zhang, Sufang Fan, Kejia Gu, Kailin Deng, Canping Pan

Index: Bull. Environ. Contam. Toxicol. 90(4) , 499-503, (2013)

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Abstract

Uniconazole residue dynamics and final residues in supervised field trials at GAP conditions were studied. The residue levels and dissipation rate of uniconazole was detected by LC-MS. At fortification levels of 0.04, 0.2 and 2 mg kg(-1), recoveries ranged from 78.7 % to 100.9 % with RSDs of 0.1 %-4.6 % (n = 5). The dissipation experiments showed the half-lives (T1/2) of uniconazole in soil and wheat plants were 2.9-3.3 and 3.8-4.4 days, respectively. At pre-harvest intervals (PHI) of 45 and 60 days, uniconazole residue were no detectable or below the limit of quantification (LOQ) in soil, wheat plants and wheat.