Ruiz-Toledo Jovani, Castro Ricardo, Rivero-Pérez Norma, Bello-Mendoza Ricardo, Sánchez Daniel
El Colegio de la Frontera Sur, Carretera Antiguo Aeropuerto Km 2.5, CP 30700, Tapachula, Chiapas, Mexico.
Bull Environ Contam Toxicol. 2014 Sep;93(3):289-93. doi: 10.1007/s00128-014-1328-0. Epub 2014 Jul 11.
Glyphosate is an agrochemical widely used to control weeds. However, glyphosate spreads to water bodies by spray-drift, run-off and leaching, potentially causing detrimental effects on non-target biota. There is no information on the occurrence of this herbicide in water bodies near crop fields in Mexico, although it is the most commonly used pesticide in this country. To fill this gap, we quantified glyphosate in water bodies from twenty-three locations, including natural protected areas and agricultural areas in southern Mexico, during the dry and the rainy seasons. We expected (1) higher concentrations during the dry season due to reduced dilution by precipitation and, (2) absence of glyphosate in the protected areas. In agreement with our expectation, concentration of glyphosate was higher during the dry season (up to 36.7 μg/L). Nonetheless, glyphosate was detected in all samples-including natural protected areas. These results emphasize the need for an evaluation of the impact of glyphosate on native species as well as regulate its use.
草甘膦是一种广泛用于控制杂草的农用化学品。然而，草甘膦会通过喷雾漂移、径流和淋溶扩散到水体中，可能会对非目标生物群造成有害影响。尽管草甘膦是墨西哥最常用的农药，但关于该国农田附近水体中这种除草剂的存在情况尚无相关信息。为了填补这一空白，我们在旱季和雨季对来自墨西哥南部23个地点（包括自然保护区和农业区）的水体中的草甘膦进行了定量分析。我们预期：（1）由于降水稀释减少，旱季的浓度会更高；（2）保护区内不存在草甘膦。与我们的预期一致，旱季草甘膦浓度更高（高达36.7μg/L）。尽管如此，在所有样本中都检测到了草甘膦——包括自然保护区。这些结果强调了评估草甘膦对本地物种的影响以及对其使用进行监管的必要性。
