Leiva Jorge A, Nkedi-Kizza Peter, Morgan Kelly T, Qureshi Jawwad A
†Soil and Water Science Department, Institute of Food and Agricultural Sciences, University of Florida, Post Office Box 110290, Gainesville, Florida 32611, United States.
J Agric Food Chem. 2015 May 27;63(20):4915-21. doi: 10.1021/acs.jafc.5b00532. Epub 2015 May 18.
Imidacloprid (IMD) is a neonicotinoid insecticide soil-drenched on sandy soils of southwest Florida for the control of Diaphorina citri Kuwayama or Asian citrus psyllid (ACP). The ACP vectors causal pathogens of a devastating citrus disease called citrus greening. Understanding the behavior of IMD in these soils and plants is critical to its performance against target pests. Samples from Immokalee fine sand (IFS) were used for sorption kinetics and equilibria experiments. IMD kinetics data were described by the one-site mass transfer (OSMT) model and reached equilibrium between 6 and 12 h. Batch equilibrium and degradation studies revealed that IMD was weakly sorbed (K(OC) = 163-230) and persistent, with a half-life of 1.0-2.6 years. Consequently, IMD has the potential to leach below the citrus root zone after the soil-drench applications.
吡虫啉（IMD）是一种新烟碱类杀虫剂，通过土壤浇灌施用于佛罗里达州西南部的沙质土壤中，用于防治柑橘木虱（Diaphorina citri Kuwayama）或亚洲柑橘木虱（ACP）。亚洲柑橘木虱传播一种名为柑橘黄龙病的毁灭性柑橘病害的致病病原体。了解吡虫啉在这些土壤和植物中的行为对于其防治目标害虫的效果至关重要。从伊莫卡利细砂（IFS）采集的样本用于吸附动力学和平衡实验。吡虫啉动力学数据由单位点传质（OSMT）模型描述，在6至12小时内达到平衡。批量平衡和降解研究表明，吡虫啉吸附较弱（K(OC)=163-230）且具有持久性，半衰期为1.0至2.6年。因此，在土壤浇灌施用后，吡虫啉有可能淋溶到柑橘根区以下。
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