PMID- 31577839 OWN - NLM STAT- MEDLINE DCOM- 20191219 LR - 20200108 IS - 1097-0010 (Electronic) IS - 0022-5142 (Linking) VI - 100 IP - 2 DP - 2020 Jan 30 TI - Meptyldinocap and azoxystrobin residue behaviors in different ecosystems under open field conditions and distribution on processed cucumber. PG - 648-655 LID - 10.1002/jsfa.10059 [doi] AB - BACKGROUND: Several diseases and insects may cause damage to the normal growth of cucumber. Azoxystrobin and meptyldinocap, because of their novel mode of action, are effective against pathogens that have developed reduced sensitivity to other fungicides. Azoxystrobin is persistent in various crops and environments. However, there is a lack of research on the dissipation of these two pesticides, especially meptyldinocap. RESULTS: Analytes could be quantified with decent recoveries of 90-101%, with relative standard deviations (RSDs) of 3.0-10.1%. The terminal residues of meptyldinocap and azoxystrobin in cucumber were all < limit of quantification (LOQ) (0.02 and 0.05 mg kg(-1) ). The half-lives of meptyldinocap and azoxystrobin were 0.8-1.1 and 1.2-2.8 days, respectively. The processing factors (PFs) for washing were all < 1, but the removal rate for washing was < 29.0%. Peeling had a significant effect on the removal of pesticide. The largest residue reductions were noticed through the pickling process, but special care should be taken regarding residues in the pickling solution as pesticides could transfer to them from cucumber. A more interesting finding was that the degradation of two pesticides was accelerated by the addition of calcium oxide. CONCLUSION: Pesticide residues on cucumber decreased after these processes. These results enable the health-risks from dietary exposures to pesticide residues to be characterized. They enable maximum residue limits (MRLs) to be established for pesticide residues in food products. They also assist the optimization of food processing with regard to pesticide residue dissipation. (c) 2019 Society of Chemical Industry. CI - (c) 2019 Society of Chemical Industry. FAU - Bian, Yanli AU - Bian Y AUID- ORCID: 0000-0002-4222-0728 AD - College of Science, China Agricultural University, Beijing, China. FAU - Guo, Gang AU - Guo G AD - College of Science, China Agricultural University, Beijing, China. FAU - Liu, Fengmao AU - Liu F AD - College of Science, China Agricultural University, Beijing, China. FAU - Chen, Xiaochu AU - Chen X AD - College of Science, China Agricultural University, Beijing, China. FAU - Wang, Zongyi AU - Wang Z AD - BeiJing Key Laboratory of Detection and Control of Spoilage Microorganisms and Pesticide Residues in Agricultural Products, Beijing University of Agricultural, Beijing, China. FAU - Hou, Tongyao AU - Hou T AD - BeiJing Key Laboratory of Detection and Control of Spoilage Microorganisms and Pesticide Residues in Agricultural Products, Beijing University of Agricultural, Beijing, China. LA - eng GR - 201503107-13/Special Found for Agro-scientific Research/ PT - Journal Article DEP - 20191125 PL - England TA - J Sci Food Agric JT - Journal of the science of food and agriculture JID - 0376334 RN - 0 (Dinitrobenzenes) RN - 0 (Fungicides, Industrial) RN - 0 (Pesticide Residues) RN - 0 (Pyrimidines) RN - 0 (Strobilurins) RN - NYH7Y08IPM (azoxystrobin) RN - OQU8KLU91P (meptyldinocap) SB - IM MH - Cucumis sativus/*chemistry MH - Dinitrobenzenes/*chemistry MH - Food Contamination/analysis MH - Fruit/chemistry MH - Fungicides, Industrial/*chemistry MH - Kinetics MH - Pesticide Residues/*chemistry MH - Pyrimidines/*chemistry MH - Strobilurins/*chemistry OTO - NOTNLM OT - azoxystrobin OT - cucumber OT - dissipation OT - meptyldinocap OT - processing EDAT- 2019/10/03 06:00 MHDA- 2019/12/20 06:00 CRDT- 2019/10/03 06:00 PHST- 2019/05/13 00:00 [received] PHST- 2019/09/11 00:00 [revised] PHST- 2019/09/25 00:00 [accepted] PHST- 2019/10/03 06:00 [pubmed] PHST- 2019/12/20 06:00 [medline] PHST- 2019/10/03 06:00 [entrez] AID - 10.1002/jsfa.10059 [doi] PST - ppublish SO - J Sci Food Agric. 2020 Jan 30;100(2):648-655. doi: 10.1002/jsfa.10059. Epub 2019 Nov 25.