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首页> 外文期刊>Environmental toxicology and chemistry >Persistence and movement of fipronil termiticide with under-slab and trenching treatments.
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Persistence and movement of fipronil termiticide with under-slab and trenching treatments.

机译：进行平板和开沟处理的氟虫腈杀白蚁剂的持久性和运动性。

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摘要

To have an effective barrier against invading termites around building structures and to assess the potential risks to the urban environment and human beings, we need to understand the fate of termiticides applied in urban soil. The movement and degradation of a new termiticide, fipronil, were investigated in Australian soils following standard termiticide treatment methods (surface application under slab and trenching treatments along walls). Surface application studies in three field sites showed slow dissipation and little movement for fipronil in all three soils under the simulated slab during a three-year period. The greatest mass of the chemical residues remained in the quartzite sand layer (thickness, 5 cm), and only small amounts of these were found to have migrated into the soil layers (depth, 0-15 cm) underneath the quartzite sand layer. Of the three metabolites (desulfinyl, sulfide, and sulfone) found in the soils, the sulfone derivative had the highest concentration. Persistence of fipronilwas affected by application rate. The time for 50% loss of the total toxic components (fipronil plus its metabolites) in the quartzite sand layer (thickness, 5 cm) ranged from 200 to 326 d for the low rate (0.15 g active ingredient/m2) and from 633 to 674 d for the high application rate (3 g active ingredient/m2). One-year trenching studies at two sites in Adelaide (Roseworthy Farm [RF] and Terretfield [TF]; South Australia, Australia) showed that vertical movement and dissipation of fipronil occurred in the soils. The average concentration of fipronil in the trenches (depth, 0-30 cm) decreased from 33.7 to 14.9 mg/kg in the loam soil at the RF site and from 39.4 to 14.6 mg/kg in the clay soil at the TF site over the year. With time under the natural weather condition, fipronil and its derivatives were found in the deeper soil sections without treatment (depth, 20-30 cm). However, laboratory studies using repacked soil columns showed low mobility in the loam soil from the RF site and a variably charged clay soil from Malanda (Queensland, Australia) under intermittent wetting and drying conditions.
机译：为了有效地阻止白蚁入侵建筑结构并评估对城市环境和人类的潜在风险，我们需要了解在城市土壤中使用的杀白蚁剂的命运。按照标准的杀白蚁剂处理方法（平板下的表面施涂和沿墙的沟槽处理），在澳大利亚土壤中研究了一种新的杀白蚁剂氟虫腈的移动和降解。在三个现场的表面应用研究表明，在三年的时间里，模拟平板下的所有三种土壤中氟虫腈的耗散缓慢且几乎没有运动。最大的化学残留物残留在石英岩砂层中（厚度为5厘米），仅发现少量化学残留物迁移到石英岩砂层下的土壤层中（深度为0-15厘米）。在土壤中发现的三种代谢物（脱亚磺酰基，硫化物和砜）中，砜衍生物的浓度最高。氟虫腈的持久性受施用量的影响。在低速率（0.15 g有效成分/ m2）下，石英岩砂层（厚度为5 cm）中总有毒成分（氟虫腈及其代谢物）损失50％的时间范围为200到326 d，从633 g损失到633 d。高用量（3 g有效成分/ m2）为674 d。在阿德莱德的两个站点（Roseworthy Farm [RF]和Terretfield [TF]；澳大利亚南澳大利亚）进行的为期一年的挖沟研究表明，土壤中发生了氟虫腈的垂直运动和消散。沟渠（深度0-30 cm）中氟虫腈的平均浓度在RF部位的壤土中从33.7降至14.9 mg / kg，在TF部位的黏土中从39.4降至14.6 mg / kg。年。随着时间的推移，在自然天气条件下，未处理的深层土壤中（深度20-30厘米）发现了氟虫腈及其衍生物。但是，使用重新装填的土壤柱进行的实验室研究表明，在间歇的湿润和干燥条件下，来自RF站点的壤土和来自Malanda（澳大利亚昆士兰州）的带电荷的粘土在土壤中的迁移率较低。

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  • 来源
    《Environmental toxicology and chemistry》 |2006年第8期|P.2045-2050|共6页
  • 作者

    Ying GG; Kookana RS;

  • 作者单位

    CSIRO Land and Water, Adelaide Laboratory, PMB 2, Glen Osmond, South Australia 5064, Australia. guangguo.ying@gmail.com;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 药学;
  • 关键词

    fipronil; Soil; RF; Persistence; m2 2; 土壤;

    机译：fipronil;Soil;RF;Persistence;m2 2;土壤;

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