农学学报2018，Vol.8Issue(5)：6-9,4.
乐果与氧乐果在露地芹菜中的残留动态及安全性评价
Residual Dynamics and Safety Assessment of Dimethoate and Omethoate in Outdoor Celery
摘要
Abstract
To ensure the safe application of dimethoate to celery, the residue dynamics of dimethoate and omethoate in celery are studied. 40% dimethoate emulsifiable concentrate was sprayed at different dosages (600 and 900 g a.i/hm2)during different growth periods,including once in the middle growth stage,twice and three times in the harvest period, and celery samples were collected. Samples were extracted by acetonitrile and determined by UPLC-MS/MS.The results showed that 3 days after one time application of dimethoate in the harvest period,the residue of dimethoate was lower than MRL value,however,the residue of omethoate was over than MRL value.The preharvest interval of 21 days was suggested for omethoate,which could ensure that the residues of dimethoate and omethoate in celery were both lower than MRL value.During the middle growth stage with one time application,the residue of dimethoate and omethoate in celery was lower than MRL value. By twice application of dimethoate during the harvest period, the residue of dimethoate in celery was lower than MRL value at 7 days.By three times application of dimethoate during the harvest period,the residue of dimethoate in celery at low dose spraying was lower than MRL value at 7 days and the residue of dimethoate in celery at high dose spraying was over MRL value at 7 days. For both twice and three times application, the residue of omethoate was over MRL value at 7 days. Repeated spraying of dimethoate can cause excessive omethoate residue,therefore,the application of dimethoate during the harvest period should be prohibited.关键词
芹菜/乐果/氧乐果/采收期Key words
Celery/Dimethoate/Omethoate/Harvest Period分类
农业科技引用本文复制引用
郭春景,王建忠,李广,林秋君..乐果与氧乐果在露地芹菜中的残留动态及安全性评价[J].农学学报,2018,8(5):6-9,4.基金项目
国家蔬菜产品质量安全风险评估项目"农药残留高敏感蔬菜筛查与关键控制点评估"(GJFP201600203) （GJFP201600203）
国家蔬菜产品质量安全风险评估项目"高敏蔬菜质量安全风险隐患摸底排查与关键控制点评估"(GJFP201700204) （GJFP201700204）
辽宁省自然科学基金项目"保护地芹菜中克百威和氧乐果残留量管控关键点研究"(20170540502). （20170540502）
