Effects of formulation on the run-off of imidacloprid from turf
Effects of formulation on the run-off of imidacloprid from turf
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DOI：
10.1002/ps.518
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发表时间：
2002-07-01
影响因子：
4.1
通讯作者：
Peeler, HB
中科院分区：
文献类型：
--
作者：
Armbrust, KL;Peeler, HB
吡虫啉是一种杀虫剂，通常用于控制住宅草坪和高尔夫球场上的害虫。为了研究吡虫啉通过降雨事件进入非目标水生系统的可能性，在5%坡度的12块种植狗牙根的地块上，分别施以5.0 g kg(-1)GR和750 g kg(-1)WP。除草剂2，4-D的二甲胺盐同时应用于小区，以使结果与之前使用其他杀虫剂进行的试验标准化。以2.5cmh(-1)的速率模拟施药后24和48h的5 cm降水事件和96h和192h的2.5 cm降水事件，并在每次事件发生后从每个小区采集水并用高效液相色谱法进行残留杀虫剂和除草剂的分析。在4次径流事件后，约1.4%的可湿性粉剂和1.9%的GR杀虫剂从小区中流失。在总质量损失中，可湿性粉剂的第一次和第二次径流事件分别发生在和30%，而GR配方分别为75%和20%。相比之下，2，4-D的总质量输出量为2.6%，其中95%和4%的损失分别发生在第一和第二次径流事件中。在径流水中检测到的吡虫啉最大浓度为0.49毫克升(-1)，发生在第一次径流事件期间。(C)2002年化学工业学会。
Imidacloprid is a pesticide often used to control insect pests on residential lawns and golf courses. To investigate its potential to be transported into non-target aquatic systems by rainfall events, imidacloprid was applied as 5.0 g kg(-1) GR and 750 g kg(-1) WP to 12 plots planted with bermuda grass set on a 5% slope. The dimethylamine salt of the herbicide 2,4-D was applied simultaneously to the plots in order to normalize the results to prior trials conducted with other pesticides. At a rate of 2.5 cm h(-1), 5-cm rainfall events were simulated at 24 and 48h after application and 2.5-cm events were simulated at 96 and 192 h. After each event water was collected from each plot and analyzed by HPLC for residual insecticide or herbicide. Approximately 1.4% of the insecticide formulated as WP and 1.9% of that formulated as GR was lost from the plots after four run-off events. Of the total mass lost, 64% and 30% respectively occurred in the first and second run-off events for the WP formulation versus 75% and 20% for the GR formulation. These values compare with a total mass export of 2.6% for 2,4-D, of which 95% and 4% of the loss occurred respectively in the first and second run-off events. The maximum concentration of imidacloprid detected in run-off water was 0.49 mg litre(-1) and occurred during the first run-off event. (C) 2002 Society of Chemical Industry.