Imidacloprid is a newly introduced broad-spectrum chloronicotinyl insecticide and will find its way in agricultural production, particularly in Asia. However, information on the fate of imidacloprid in crop plants is lacking. The degradation of imidacloprid in processed CTC tea and tea liquor was investigated in the present study in which imidacloprid was applied at recommended application rate (30.0 g a.i./ha) and twice the recommended application rate (60.0 g a.i./ha) for three consecutive seasons. Imidacloprid was rapidly dissipated in processed tea following first order reaction kinetics at all application rates and had half-lives of 0.91~1.16 d with the residue in tea liquor found to be below detectable limit on 3rd day samples. The study revealed that imidacloprid is safe for human consumption and will not pose any residual toxicity problem.
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机译：吡虫啉是一种新推出的广谱氯烟碱杀虫剂，将在农业生产中找到应用，特别是在亚洲。但是，缺乏关于吡虫啉在作物中的命运的信息。在本研究中，研究了吡虫啉在加工后的CTC茶和茶液中的降解情况，其中吡虫啉以推荐的施用量（30.0 g ai / ha）和推荐的施用量（60.0 g ai / ha）连续三个季节施用两次。吡虫啉在所有施用量下均按照一级反应动力学迅速地耗散在加工茶中，半衰期为0.91〜1.16 d，而茶液中的残留量在第3天样品中低于可检测限。研究表明吡虫啉对人类食用是安全的，不会造成任何残留的毒性问题。
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