...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>The Science of the Total Environment >Winds of change, developing a non-target plant bioassay employing field-based pesticide drift exposure: A case study with atrazine
【24h】

Winds of change, developing a non-target plant bioassay employing field-based pesticide drift exposure: A case study with atrazine

机译：变革之风，开发基于野外农药漂移的非目标植物生物测定法：阿特拉津的案例研究

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

A field-scale, spray drift study with atrazine was conducted to simultaneously measure spray drift deposition, airborne interception and corresponding biological effects on two sensitive plant species (cucumber and lettuce). Applications of AAtrex 4L (atrazine) were made using ultra-coarse nozzles (Teejet TTI11004) under worst-case drift potential conditions of bare soil and high wind speeds (i.e. 10 mph: 16 kph). This study was replicated 4 times, each with two parallel spray swaths (92.5 ft or 28 m per swath) perpendicular to wind direction. Within each replicate application, three sampling lines were used to measure drift deposition (using stainless-steel discs) at distances out to 400 ft (122 m), airborne interception (using stainless-steel rods) at distances out to 75 ft (23 m), and potential direct plant effects at 5, 15, 25, 35, and 45 ft (1.5, 4.6, 7.6, 10.7, and 13.7 m) from the downwind edge of the spray swath. Corresponding upwind control discs and plants were also included in each replicate. Each replicate application targeted steady wind speeds between 10 and 15 mph (16 and 24 kph) within a 30-degree angle of the downwind field orientation. On average, each 10% increase in distance from the spray zone resulted in approximately 14% less ground-deposited atrazine. Between 7 and 41 x more atrazine mass was collected from vertical rods (airborne drift), compared to horizontally placed stainless-steel discs (ground deposition). Cucumber and lettuce plants exposed to spray drift were monitored for biological effects over 21 days post-application according to standard protocols. Endpoints of survival, weight (biomass), and shoot length were evaluated by comparing distance groups to up-wind controls. Overall, when trials were combined, the aggregate lowest observable effect distance (LOED) was 5-ft (1.5 m) and the aggregate no observable effects distance (NOED) was 15-ft (4.6 m), with cucumbers affected more than lettuce. (C) 2019 Elsevier 13.V. All rights reserved.
机译：用阿特拉津进行了田间规模的喷雾飘移研究，以同时测量喷雾飘移的沉积，空气传播的拦截以及对两种敏感植物（黄瓜和生菜）的相应生物学效应。 AAtrex 4L（阿特拉津）的应用是使用超粗喷嘴（Teejet TTI11004）在裸土和高风速（即> 10 mph：> 16 kph）的最坏情况下可能出现的漂移条件下进行的。这项研究进行了4次重复，每组垂直于风向，有两个平行的喷幅（92.5 ft或每幅28 m）。在每个重复应用中，使用三条采样线来测量400英尺（122 m）远处的漂移沉降（使用不锈钢圆盘），75英尺（23 m）处的空中拦截（使用不锈钢棒） ），以及距喷水带顺风边缘5、15、25、35和45英尺（1.5、4.6、7.6、10.7和13.7 m）的潜在直接植物效应。每个副本中还包括相应的迎风控制盘和植物。每个重复应用的目标是在顺风场方向的30度角内，稳定风速在10到15 mph（16到24 kph）之间。平均而言，距喷洒区的距离每增加10％，地面沉积的at去津就减少约14％。与水平放置的不锈钢圆盘（地面沉积）相比，垂直杆（空中飘移）收集到的阿特拉津质量增加了7到41倍。根据标准方案，在施用后21天内监测暴露于喷雾漂移的黄瓜和生菜植物的生物效应。通过将距离组与迎风对照进行比较，评估了存活率，体重（生物量）和芽长的终点。总体而言，当合并试验时，总的最低可观察到的影响距离（LOED）为5英尺（1.5 m），总的无可观察到的影响距离（NOED）为15英尺（4.6 m），黄瓜的影响大于生菜。 （C）2019爱思唯尔13.V.版权所有。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号