Investigation of Seasonal Changes and Ecological Risk Assessments of Neonicotinoid Pesticides in Rivers in Osaka, Japan

K. Oyama, Y. Yabuki, A. Banno
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引用次数: 3

Abstract

Concentrations of neonicotinoids and fipronil in river water were investigated in rural areas, the lower reach of the sewage disposal plant and principal rivers in Osaka Prefecture. As a result, pesticides other than nitenpyram and thiacloprid were detected at all sampling sites. Concentrations of imidacloprid increased drastically in June and concentrations of dinotefuran increased drastically from August to September. These periods were contemporaneous with spraying periods of these pesticides in rice fields. It was determined that none of the pesticide concentrations exceeded the water quality standards in Japan or Predicted Environmental Concentrations (PEC), which were calculated by the Ministry of the Environment, in all survey spots. On the other hand, more than 5% of the aquatic organisms are expected to be affected by neonicotinoids in rural area rivers from late May to June according to the calculation from species sensitivity distribution (SSD) of multiple influence of aquatic arthropods.
日本大阪地区河流中新烟碱类农药的季节变化及生态风险评价
对大阪府农村地区、污水处理厂下游和主要河流的河水中新烟碱类和氟虫腈的浓度进行了调查。结果,在所有采样点均检测到除虫胺和噻虫啉以外的其他农药。吡虫啉浓度在6月急剧上升,敌敌畏浓度在8 - 9月急剧上升。这些时期与这些农药在稻田的喷洒时期是同步的。所有调查地点的农药浓度均未超过日本的水质标准或环境部计算的预测环境浓度(PEC)。另一方面,根据水生节肢动物多重影响的物种敏感性分布(SSD)计算,预计5月下旬至6月农村河流中有5%以上的水生生物受到新烟碱类杀虫剂的影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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