PMID- 28754023 OWN - NLM STAT- MEDLINE DCOM- 20180102 LR - 20240109 IS - 1660-4601 (Electronic) IS - 1661-7827 (Print) IS - 1660-4601 (Linking) VI - 14 IP - 7 DP - 2017 Jul 21 TI - Dissipation and Residues of Pyrethrins in Leaf Lettuce under Greenhouse and Open Field Conditions. LID - 10.3390/ijerph14070822 [doi] LID - 822 AB - Pyrethrins are nowadays widely used for prevention and control of insects in leaf lettuce. However, there is a concern about the pesticide residue in leaf lettuce. A reliable analytical method for determination of pyrethrins (pyrethrin-and capital PE, Cyrillic, cinerin capital I, Ukrainian and capital PE, Cyrillic, and jasmolin capital I, Ukrainian and capital PE, Cyrillic) in leaf lettuce was developed by using gas chromatography-mass spectrometry (GC-MS). Recoveries of pyrethrins in leaf lettuce at three spiking levels were 99.4-104.0% with relative standard deviations of 0.9-3.1% (n = 5). Evaluation of dissipation and final residues of pyrethrins in leaf lettuce were determined at six different locations, including the open field, as well as under greenhouse conditions. The initial concentration of pyrethrins in greenhouse (0.57 mg/kg) was higher than in open field (0.25 mg/kg) and the half-life for pyrethrins disappearance in field lettuce (0.7 days) was less than that greenhouse lettuce (1.1 days). Factors such as rainfall, solar radiation, wind speed, and crop growth rate are likely to have caused these results. The final residue in leaf lettuce was far below the maximum residue limits (MRLs) (1 mg/kg established by the European Union (EU), Australia, Korea, Japan). FAU - Pan, Lixiang AU - Pan L AD - College of Science, China Agricultural University, Beijing 100193, China. panlixiang5545@cau.edu.cn. FAU - Feng, Xiaoxiao AU - Feng X AD - College of Science, China Agricultural University, Beijing 100193, China. xxf0423@cau.edu.cn. FAU - Zhang, Hongyan AU - Zhang H AD - College of Science, China Agricultural University, Beijing 100193, China. hongyan@cau.edu.cn. LA - eng PT - Journal Article DEP - 20170721 PL - Switzerland TA - Int J Environ Res Public Health JT - International journal of environmental research and public health JID - 101238455 RN - 0 (Pesticide Residues) RN - 0 (Pesticides) RN - 0 (Pyrethrins) SB - IM MH - Agriculture MH - Environment, Controlled MH - Gas Chromatography-Mass Spectrometry MH - Half-Life MH - Lactuca/*chemistry MH - Pesticide Residues/*chemistry MH - Pesticides/*chemistry MH - Pyrethrins/*chemistry PMC - PMC5551260 OTO - NOTNLM OT - GC/MS OT - dissipation OT - leaf lettuce OT - pyrethrins OT - residue COIS- The authors declare no conflict of interest. EDAT- 2017/07/30 06:00 MHDA- 2018/01/03 06:00 PMCR- 2017/07/01 CRDT- 2017/07/30 06:00 PHST- 2017/06/29 00:00 [received] PHST- 2017/07/17 00:00 [revised] PHST- 2017/07/18 00:00 [accepted] PHST- 2017/07/30 06:00 [entrez] PHST- 2017/07/30 06:00 [pubmed] PHST- 2018/01/03 06:00 [medline] PHST- 2017/07/01 00:00 [pmc-release] AID - ijerph14070822 [pii] AID - ijerph-14-00822 [pii] AID - 10.3390/ijerph14070822 [doi] PST - epublish SO - Int J Environ Res Public Health. 2017 Jul 21;14(7):822. doi: 10.3390/ijerph14070822.