South China Agricultural University, Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education, South China Agricultural University, Guangzhou, 510642, China.
Guangdong Key Laboratory of Animal Conservation and Resource Utilization, Guangdong Public Laboratory of Wild Animal Conservation and Utilization, Guangdong Institute of Applied Biological Resources, Guangzhou, 510642, China.
Environ Sci Pollut Res Int. 2017 Oct;24(29):22940-22947. doi: 10.1007/s11356-017-9879-3. Epub 2017 Aug 16.
Drosophila is a common strawberry pest. In this work, toxicities of the 77.5% EC dichlorvos to 3rd instar larvae and adults of drosophila were evaluated through indoor bioassays and field bioassays, respectively. To insure the safety, dichlorvos dissipation and terminal residue in strawberry by different application methods under field conditions were determined by high-performance liquid chromatography. The decline curves of dichlorvos residues in strawberry corresponded with first-order kinetics, and dichlorvos dissipated rapidly in strawberry with half-life (t) of 7.58-13.17 h. Terminal residues below the maximum residue limit of strawberry and soil in different distance were achieved after 24 h under different application methods. This article provides guidance to the proper and safe use of dichlorvos in agriculture; it is more reasonable that dichlorvos is applied by embedding on the ground near the strawberry plants covered plastic film with holes.
果蝇是一种常见的草莓害虫。在这项工作中，分别通过室内生物测定和田间生物测定评估了 77.5% EC 敌敌畏对 3 龄幼虫和成虫的毒性。为了确保安全，采用高效液相色谱法测定了不同施药方法下敌敌畏在草莓中的消解动态和最终残留量。草莓中敌敌畏残留量的下降曲线符合一级动力学，敌敌畏在草莓中的消解速度很快，半衰期（t）为 7.58-13.17 h。不同施药方法下，24 h 后，在不同距离处草莓和土壤中的最终残留量均低于最大残留限量。本文为敌敌畏在农业上的合理安全使用提供了指导；将敌敌畏嵌入靠近草莓植株的地面上，并覆盖带孔塑料薄膜的施药方法更为合理。
