Chen Huiya, Yang Liupeng, Huang Jiajian, Wu Jian, Zhou Jingtong, Tang Shiqi, Huang Suqing, Cheng Dongmei, Zhang Zhixiang
Guangdong Biological Pesticide Engineering Technology Research Center, South China Agricultural University, Guangzhou, 510642, China.
Zhongkai University of Agriculture and Engineering, Guangzhou, 510225, China.
Environ Sci Pollut Res Int. 2023 Feb;30(8):21588-21597. doi: 10.1007/s11356-022-23698-y. Epub 2022 Oct 22.
Bifenthrin is a pyrethroid pesticide widely used on kumquats, but the residues in the peel and pulp after bifenthrin application at different maturity stages of kumquats have not been evaluated. This study developed a simple and rapid high-performance liquid chromatography (HPLC) method for the quantitative analysis of bifenthrin residues in whole fruit, kumquat peel, kumquat pulp, and soil. The results showed that regardless of whether bifenthrin was applied one or three times during the near-mature period, the half-lives of the fruit peel and fruit pulp were longer than those in the immature period. Kumquat fruit residues decreased with time at both maturity levels. The residues of bifenthrin in near-mature fruit exceeded the MRL in Guangxi and Fujian 14 days after the three applications of bifenthrin, suggesting that this issue should be focused on in kumquat production and supervision. However, for bifenthrin application in either the near-mature or the immature fruit period, the calculated risks for chronic dietary intake of kumquat were well below 100%. The data demonstrate that the chronic dietary intake risk of bifenthrin through kumquat consumption is low and within acceptable limits. These results provide a reference and risk assessment data for the safe and rational use of bifenthrin insecticides.
联苯菊酯是一种广泛用于金橘的拟除虫菊酯类农药，但在金橘不同成熟阶段施用联苯菊酯后，果皮和果肉中的残留情况尚未得到评估。本研究建立了一种简单快速的高效液相色谱（HPLC）方法，用于定量分析全果、金橘皮、金橘果肉和土壤中的联苯菊酯残留。结果表明，无论在近成熟阶段施用联苯菊酯一次还是三次，果皮和果肉的半衰期均比未成熟阶段长。两个成熟度水平下，金橘果实中的残留量均随时间下降。在三次施用联苯菊酯后14天，近成熟果实中联苯菊酯的残留量超过了广西和福建的最大残留限量，这表明在金橘生产和监管中应关注这一问题。然而，对于在近成熟或未成熟果实期施用联苯菊酯，计算得出的金橘慢性膳食摄入风险远低于100%。数据表明，通过食用金橘摄入联苯菊酯的慢性膳食摄入风险较低且在可接受范围内。这些结果为联苯菊酯类杀虫剂的安全合理使用提供了参考和风险评估数据。
