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首页> 外文期刊>British Biotechnology Journal >Using Aedes aegypti larvae to Assess PesticideContamination of Soil, Groundwater andVegetables
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Using Aedes aegypti larvae to Assess PesticideContamination of Soil, Groundwater andVegetables

机译：用埃及伊蚊幼虫评估土壤，地下水和蔬菜中的农药污染

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In Benin, the use of synthetic pesticides in vegetable production poses a risk to the environment and human health. Vegetables, water and soil quality assessment is very important for monitoring and mitigation of these risks. The evaluation of pesticide contamination of vegetables and agricultural environment is often made using expensive methods. It is crucial for research in so-called developing countries to develop less expensive tools for pesticide risks assessment and monitoring. The aim of this study was to assess the potential of using Aedes aegypti larvae as a bio-indicator to measure the pesticide contamination of soil, groundwater and vegetables. Vegetables just before harvest, groundwater and soils samples from three production sites and vegetables samples from markets were collected from March to August 2011. Ethanol extracts of these samples were tested on first stage larvae of Aedes aegypti. The method made it possible to detect residues of chlorpyrifos-ethyl and deltamethrin in cabbage until 4 and 8 days respectively after treatment with the recommended doses for crop protection. It proved inappropriate to measure pesticides residues in market-gardening soils, since these soils contain some amounts of nitrite, nitrate and phosphate, coming from the decomposition of fertilizers which are poisonous for the first stage larvae of Aedes aegypti. Overall, the results revealed the presence of small amounts of pesticides residues in 12.5% of the vegetables collected from markets. Pesticides residues were also detected in 30.0% of vegetables collected just before harvest. Residues of pesticide were not detected in groundwater samples collected from vegetable growing areas. First stage larvae of Aedes aegypti could be used as a bio-indicator to characterize and monitor risk of pesticide contamination of vegetables in southern Benin. It could also be used for a monitoring program before running a more thorough chemical analysis to identify and quantify the pesticide molecules present in samples.
机译：在贝宁，在蔬菜生产中使用合成农药会对环境和人类健康构成威胁。蔬菜，水和土壤质量评估对于监控和减轻这些风险非常重要。蔬菜和农业环境中农药污染的评估通常使用昂贵的方法进行。对于所谓的发展中国家的研究而言，开发成本较低的农药风险评估和监测工具至关重要。这项研究的目的是评估使用埃及伊蚊幼虫作为生物指标来测量土壤，地下水和蔬菜中农药污染的潜力。收获前的蔬菜，2011年3月至2011年8月收集了三个生产地点的地下水和土壤样品以及市场上的蔬菜样品。这些样品的乙醇提取物在埃及伊蚊的第一阶段幼虫中进行了测试。该方法可以检测到用推荐剂量的作物保护作用分别处理4到8天后，白菜中的毒死until乙基和溴氰菊酯残留。事实证明，测量市场化土壤中的农药残留是不适当的，因为这些土壤中含有一定量的亚硝酸盐，硝酸盐和磷酸盐，这是由于分解化肥而产生的，这些化肥对埃及伊蚊的第一阶段幼虫有毒。总体而言，结果表明从市场上收集的蔬菜中有12.5％的蔬菜中存在少量农药残留。在收获前30.0％的蔬菜中也检测到了农药残留。从蔬菜种植区收集的地下水样品中未检测到农药残留。埃及伊蚊的第一阶段幼虫可以用作生物指标，以表征和监测贝宁南部蔬菜的农药污染风险。在进行更彻底的化学分析之前，还可以将其用于监测程序，以鉴定和量化样品中存在的农药分子。

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