A new type of mesoionic insecticide triflumezopyrim is mainly used to control rice planthoppers, leafhoppers, etc. In order to study the uptake and translocation characteristics of this new insecticide in rice (Oryza sativa), a method for the detection of triflumezopyrim in rice, soil, and water was established using liquid–liquid extraction and QuEChERS sample pretreatment combined with liquid chromatography–triple quadrupole tandem mass spectrometry. The distribution of triflumezopyrim in rice was investigated after hydroponic treatment and foliar treatment at the concentrations of 2.5 and 5 mg·L^–1 within the ranges of 24, 48, and 72 h. The results showed that triflumezopyrim could be absorbed by roots and form a systematic distribution in rice by hydroponic treatment; meanwhile, it could also be absorbed by leaves and transported to the bottom leaves under foliar treatment, but no triflumezopyrim was detected in the roots. Thus, triflumezopyrim exhibited high acropetal translocation within the rice plant. This study provides an important scientific basis for the development of an application strategy of triflumezopyrim to control planthoppers and leafhoppers as well as for the residue detection method and safety evaluation.

中文翻译：

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水稻中氟虫草的吸收和转运。

一种新型的中离子杀虫剂三氟甲嘧啶主要用于防治稻飞虱，叶蝉等。为了研究这种新型杀虫剂在水稻（稻（Oryza sativa））中的吸收和转运特性，一种检测稻米，土壤中三氟甲嘧啶的方法，然后使用液-液萃取和QuEChERS样品预处理结合液相色谱-三重四极杆串联质谱法建立水。在2.5和5 mg·L ^–1的浓度下进行水耕和叶面处理后，研究了三氟甲嘧啶在水稻中的分布。在24、48和72小时的范围内。结果表明，水培处理可以使三氟甲嘧啶被根吸收并在水稻中形成系统分布。同时，叶面处理还可以吸收叶绿素，并运至下叶，但根中未检出三氟甲嘧啶。因此，三氟甲嘧啶在水稻植物中表现出较高的顶位易位。该研究为开发氟虫草防治飞虱和叶蝉的应用策略，以及残留检测方法和安全性评价提供了重要的科学依据。