Field dissipation of trifloxystrobin and its metabolite trifloxystrobin acid in soil and apples

Abstract

The dissipation of trifloxystrobin and its metabolite trifloxystrobin acid in apples and soil was studied, and the half-life (DT₅₀) was estimated in a field study carried out at three different locations for apples and four different locations for soil. Trifloxystrobin was sprayed on apples at 127 g a.i./ha for the dissipation study. Samples of apple and soil for the dissipation experiment were collected at time intervals of 0, 1, 3, 7, 14, 21, 30, and 45 days after treatment. The quantification of residues was done by liquid chromatography-tandem mass spectrometry (LC-MS/MS). The DT₅₀ of trifloxystrobin ranged from 0.54 to 8.8 and 4.8 to 9.5 days in soil and apples at different latitude sites. Photolysis may be the main dissipation pathway for trifloxystrobin, and the number of sunshine hours may be the main factor affecting the trifloxystrobin dissipation rate in the field. For trifloxystrobin acid residues in soil and apples, it first increased and then began decreasing. It was indicated that the risk of trifloxystrobin application in shorter sunshine hour area should be considered.

Desorption and mobilization of three strobilurin fungicides in three types of soil

“…Since then, strobilurin fungicides have taken an important position in pesticide chemistry and become one of the most important classes of fungicides due to their stronger biological activities and lower toxicity (Gullino et al 2002;Wang et al 2015). Strobilurin is a group of agricultural fungicides for its unique mechanism, good environmental compatibility, and actual application to improve crop yield and quality (de Souza et al 2009;Xu et al 2014).…”

Simultaneous determination of difenoconazole, trifloxystrobin and its metabolite trifloxystrobin acid residues in watermelon under field conditions by GC–MS/MS

“…For example, the dissipation of difenoconzole in apple and soil samples from different sites in China (Xiaoxian [Anhui province], Daxing [Beijing] and Hangzhou [Zhejiang province]) had been studied. The half‐lives of difenoconazole in apples and soils were 6.3–10.2 and 9.6–68.4 days, respectively (Wang et al, ). Studies on the similarity mixture fungicides, trifloxystrobin and tebuconzole (75%, WG) residue behavior in gherkin and mango fruit had indicated that the residue of trifloxystrobin and tebuconzole in different matrices fitted with the first‐order kinetics model (Guo et al, ; Mohapatra, ).…”

“…There are previous reports on the dissipation pattern and final residues of difenoconazole and trifloxystrobin in some other matrices, such as rice (Cao et al, 2015;Chen et al, 2014;Li, Wang, Hao, & Han, 2014), tomato (Kong et al, 2012;Wang et al, 2014), apple (Guo, Li, Guo, & Wang, 2010;Wang, Wu, Zhang, Wang, & Zhang, 2015) and many other principal fruits and vegetables (Banerjee, Oulkar, Patil, Dasgupta, & Adsule, 2008;Liu et al, 2011;Mohapatra, 2015;Park et al, 2007). In previous papers, trifloxystrobin was determined by HPLC (Likas & Tsiropoulos, 2014;Zhu, Dai, Fang, & Zhu, 2013), GC with electron capture (Likas, Tsiropoulos, & Miliadis, 2007) or GC with MS (Paramasivam et al, 2015), while determination of difenoconazole was mainly developed by GC (Guo et al, 2010) and UPLC-MS/MS (Kong et al, 2012).…”

Determination, residue and risk assessment of trifloxystrobin, trifloxystrobin acid and tebuconazole in Chinese rice consumption

“…However, photolysis is a major dissipation factor for TFS. To reduce the risk from TFS, application of TFS during a period of sunshine is suggested (C. Wang, Wu, Zhang, Wang, & Zhang, ). Trifloxystrobin acid (TFSA) is the main metabolite of TFS.…”

“…The overall average recoveries were from 74.2 to 107.4% with RSDs of <7.8%. C. Wang, Wu, et al () established a dispersive solid‐phase extraction method for purification and an LC–MS/MS method for the determination of TFS and TFSA in apples and soil. The determination coefficients ( R 2 ) were >0.99, and the LOD and LOQ values were 5.0 × 10 −3 ng and 10 μg/kg, respectively.…”