摘要
为评估阿维菌素在城市绿地环境喷雾使用后的残留风险,为病虫害防控安全用药提供科学依据,在家庭园艺和公园场景下追踪其在多介质环境的残留动态,通过液相色谱-质谱联用技术,测定阿维菌素在上述环境介质中的残留量随时间变化的规律。结果显示,在空气中,阿维菌素可迅速降解,施药后1 h降解率可达90%以上;阿维菌素在家庭园艺土壤和水体中降解速率较慢,半衰期分别为12.38 d和9.50 d,显著高于公园土壤和水体的6.13 d和1.18 d;阿维菌素在植物叶片中降解较快,半衰期约为1 d。综上所述,阿维菌素在城市多种环境介质中整体降解速率较快,残留风险较低,对生态环境较安全。
To explore the residual risk of abamectin after spray application in urban green spaces and guide the safe use of pesticides for pest control,abamectin was sprayed in home gardens and park environments.The amounts of abamectin residual in air,water,plant leaves and soil at different times were determined by liquid chromatography-mass spectrometry.The results showed that abamectin could rapidly degrade in the air,with a degradation rate of over 90%within 1 hour after application.The degradation rate of abamectin in the soil and water of home gardens was relatively slow,with half-lives of 12.38 days and 9.50 days,respectively,which were significantly longer than those in the soil and water of park(6.13 days and 1.18 days).Abamectin degraded relatively quick in plants,with a half-life of approximately 1 day.In conclusion,degradation of abamectin is relatively fast with a high overall degradation rate in various urban environmental media,and a low residual risk.It is relatively safe for the ecological environment.
作者
胡月
彭玮
熊艳芳
周涵宇
田立超
HU Yue;PENG Wei;XIONG Yanfang;ZHOU Hanyu;TIAN Lichao(Chongqing Landscape and Gardening Research Institute/Chongqing Key Laboratory of Germplasm Innovation and Utilization of Native Plants,Chongqing 401329,China)
出处
《植物医学》
2025年第6期58-64,共7页
Plant Health and Medicine
基金
重庆市科研机构绩效激励引导专项(CSTB2023JXJL-YFX0062,CSTB2024JXJL-YFX0051)。
关键词
阿维菌素
城市绿地
残留
降解动态
abamectin
urban green space
residual
degradation dynamics
