Zhan Hu, Jun Li, Y. Zhang
Jul 5, 2020
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Journal
Journal of the science of food and agriculture
Abstract
BACKGROUND In order to clarify whether the application of diflufenican in the wheat field will produce residues in wheat plants and soil. In this experiment, ultra-high-pressure liquid chromatography was used to determine the residues of diflufenican in wheat plants, grains, and soil, which provided a new theoretical basis and technical guidance for the safe production of wheat. RESULTS The results showed that diflufenican's average recoveries per added level in wheat and soil were in the range of 85.7%~91.3%, relative standard deviations were all in a range of 2.43%~6.00%, and the minimum detectable amount of diflufenican was 1.0×10-10 g kg-1 . With the increase of wheat growing days and soil layers, the residues of diflufenican in wheat plants and soil became lower. The residues amount of diflufenican in the growth period were heading period, flowering period, filling period and maturing period from top to bottom. The residual amount of diflufenican in different soil layers was 0-20cm, 20-40cm, 40-60cm, 60-80cm and 80-100cm respectively from the top to the bottom. In addition, with the increase of the dosage of diflufenican, the residual amount of diflufenican becomes higher. And the diflufenican's residual amount of 2.0 times applying amount was higher than that 1.0 time applying amount. CONCLUSION The residual amounts of diflufenican in wheat and soil were very little, far below the value of the MRL on wheat provided by China. Under applying amount of this experiment, a single spray of diflufenican in wheat trifoliate is safe for wheat, humans and livestock. This article is protected by copyright. All rights reserved.