Department of Agricultural Entomology, Tamil Nadu Agricultural University, Coimbatore 641003, Tamil Nadu, India.
Department of Agricultural Entomology, Tamil Nadu Agricultural University, Coimbatore 641003, Tamil Nadu, India.
Food Chem. 2024 Mar 1;435:137589. doi: 10.1016/j.foodchem.2023.137589. Epub 2023 Sep 29.
Flonicamid and dinotefuran are highly effective insecticides in paddy but residue persistence in crop and transmission into food and feed is unknown. This study aimed to examine initial deposits and dissipation kinetics of flonicamid and dinotefuran in paddy matrices and processed products including bran oil. The method was validated following acetonitrile extraction, dispersive solid phase clean-up and finally determination using liquid chromatography-mass spectrometry/mass spectrometry. Recoveries ranged from 76.6 to 109.7 percent for the paddy matrices tested. In a field experiment, flonicamid and dinotefuran were applied to paddy crops to study dissipation patterns. The half-lives of flonicamid and dinotefuran residues in paddy ranged from 2.0 to 3.0 days. However, at harvest time paddy grain and straw samples were found free from residues. Monitoring of residues in farm gate and market samples revealed that paddy products were not contaminated with flonicamid or dinotefuran residues.
氟虫酰胺和噻虫嗪在稻田中具有高效的杀虫作用，但在作物中的残留持久性以及向食物和饲料中的迁移情况尚不清楚。本研究旨在考察氟虫酰胺和噻虫嗪在稻田基质及加工产品（包括糠油）中的初始沉积和消解动态。该方法经过乙腈提取、分散固相净化，最后采用液相色谱-质谱/质谱法进行测定，得到了验证。在测试的稻田基质中，回收率范围为 76.6%至 109.7%。在田间试验中，将氟虫酰胺和噻虫嗪施用于稻田作物，以研究其消解模式。氟虫酰胺和噻虫嗪在稻田中的半衰期范围为 2.0 至 3.0 天。然而，在收获时，稻谷和稻草样本中均未检出残留。对农场门口和市场样本中的残留情况进行监测后发现，稻谷产品并未受到氟虫酰胺或噻虫嗪残留的污染。
