Toxicidad aguda de una formulación comercial de glifosato sobre Poecilla reticulata (pisces: poecilidae) en condiciones de laboratorio.

Glyphosate is an herbicide that is widely used in Colombia not only for farming, but also for illicit crop eradication. Wind drift in air spraying and the lixiviation of this product can contaminate water bodies and for this reason, it is important to measure its toxic effect. Fish such as the Poecilla reticulata were submitted to concentrations of 0; 2.3; 5.5; 8.3; 11.0; 13.8 mg of glyphosate/L in the commercial formula Roundup® 747 SG/L to determine the mortality of treated individuals and the lethal concentration 50 (LC50-96) in lab conditions. Mortality was tested at 24, 48, 72, and 96 hours, and we were able to find that it increased as the herbicide concentration and the time elapsed increased. We also noticed a variation in the swimming pattern of the fish studied. The value of the 50-lethal concentration glyphosate over P. reticulata during the first 96 hours that the treatment was applied was of 3.14 mg/L, which suggests an ecological impact in natural ecosystems and a potential use of this type of fish as a contamination bioindicator for this herbicide in extreme toxicity tests. [ABSTRACT FROM AUTHOR]