Glyphosate multiplies cyanobacteria

Glyphosate multiplies cyanobacteria

So far no one has linked Glyphosate as a direct and predominant actor in the increase of cyanobacteria and euphratization in our country (Uruguay).

Apparently, since it is unequivocal that the main trigger for this problem that leads to our water rotting is the adopted Agroindustrial Development System, the leading role of the main pesticide used has been overlooked.

ECOAPICULTORES sees the importance of directly relating the association of the increase in contamination by cyanobacteria with published scientific foundation.

The statement of the National Director of the Environment (DINAMA), Alejandro Nario, that the proliferation of cyanobacteria is due to climate change and the use of fertilizers in agricultural production is not enough. (one)

It is necessary to clarify that in recent years the use of this pesticide has increased, reaching more than 15 million liters per year, together with other pesticides and fertilizers.

Generally, a very easy catchphrase of blaming fertilization is chosen, without clarifying that fertilization is the culprit because it is actually misapplied. A fertilization that must be done constantly because the IMPOSED AGRICULTURAL SYSTEM does not contemplate that there should be fixation in the soils of the same. It is not interested in generating FERTILITY. The sale of this and other supplies is more important year after year. And most of these synthetic fertilizers are not fixed, they are lost in the air and with runoff water.

The loss of biodiversity and natural vegetation on the margins of the waterways means that there is no buffering of nutrients, and therefore there is no consumption of these, which end up reaching the water. This loss of biodiversity is the product of an increasingly strong concept of PRODUCTIVISM promoted by the SYSTEM, where more and more toxic herbicides are used, and the example that more clearly points out this phenomenon can be pointed out in what our Countrymen call, " dirty field ”, to any small fraction of soils that express diverse, barely exuberant natural vegetation. And turning it into a clean field, that one has a few grasses and with the best of luck some foreign legumes.

The information on how Glyphosate contributes to the proliferation of cyanobacteria and euphratization is neither secret nor new, only not taken into account by the official actors and promoters of this AGROINDUSTRIAL AND EXTRACTIVIST SYSTEM.

Pérez et al. 2007: Effects of Roundup herbicide on freshwater microbial communities: a mesocosm study.

… Regarding Glyphosate and aquatic microbial communities. The abundance of micro and nano phytoplankton decreased and the level of picocyanobacteria increased about 40 times. Total primary production doubled. Dead were observed compared to the living. The abundance of cyanobacteria increased 4.5 times. The pigment composition of the phytoplankton and the absorption spectrum changed. The effects produced on the structure of the microbial community are more consistent with the direct effect of glyphosate than with phosphorus enrichment. (two).

Maria S. Vera et al. 2009 .- New evidence of the impact of Roundup (glyphosate formulation) in the periphyton community and the water quality of freshwater ecosystems. Total phosphorus increased significantly in treated mesocosms due to Roundup degradation, which favored the eutrophication process. Roundup produced a clear delay in peripheral colonization in the treated mesocosms, and the values ​​of the peripheral mass variables (dry weight, ash-free dry weight and chlorophyll a) were always higher in the control mesocosms. Despite the mortality of algae, mainly diatoms, cyanobacteria were favored in the treated mesocosms. It was observed that glyphosate produced a long-term change in the mesocosm typology, "clear" that became "cloudy", which is consistent with the regional trend in shallow lakes in the Pampa plain in Argentina. Based on our findings, it is clear that agricultural practices that involve the use of herbicides such as Roundup affect non-target organisms and water quality, modifying the structure and functionality of freshwater ecosystems. (3).

It is also known that phosphate fertilization synergizes the runoff or diffusion of glyphosate allowing easier contamination of water sources and soils, as an example it is worth mentioning:

Maria Carolina Salsal et al. 2015. Loss of glyphosate due to runoff and its relationship with phosphorus fertilization. The objective of this study was to evaluate the relationship between the application of fertilizers with glyphosate and phosphate and its contribution to the contamination of surface water runoff. Determining: The application of phosphorus fertilizer resulted in a greater loss of glyphosate by runoff after 1 day of application. (4)

Marcelo Pedrosa Gomez 2015. Consequences of the application of phosphate in the absorption of glyphosate by the roots: Impacts for environmental management practices. Phosphate (PO4 3) fertilization is a common practice in agricultural fields also targets for glyphosate application. Due to their chemical similarities, phosphate and glyphosate compete for adsorption sites in the soil, with phosphate fertilization increasing the bioavailability of glyphosate in the soil solution. After phosphate utilization, its concentration will be high in the soil solution and both phosphate and glyphosate will be available for runoff in aquatic ecosystems. … In agricultural conditions, phosphate fertilization can amplify the efficiency of glyphosate by increasing its uptake by unwanted plant roots. On the other hand, since simultaneous phosphate and glyphosate runoff are common, non-target species found near agricultural fields may be affected.

María C. Sasal 2009. Glyphosate Losses due to Drainage and Runoff in Molisols under Direct Sowing. The results obtained on the contribution of soybean cultivation to water contamination by glyphosate and AMPA showed their presence in drainage and runoff water, in coincidence with spring rains that favor the rapid passage of water towards the water table or towards surface water courses. Although the concentrations found were high in relation to the European standard, the amount of glyphosate and AMPA that left the system was very small, both due to runoff and drainage, representing less than 0.03 and less than 0.6% of the amounts applied, respectively. (6)

Omitting Glyphosate as directly related to the proliferation of cyanobacteria and euphratization is nothing more than a reflection of an ill-intentioned action by the defenders of the Agroindustrial Development System that day by day demonstrates its UNSUSTAINABILITY. This System is condemning our Population and our children to a deterioration of their HEALTH, and an impoverishment due to contamination of their natural resources that will be very difficult to reverse if immediate measures are not taken, such as the strict prohibition of glyphosate and other pesticides so and more dangerous.


  2. Effects of the herbicide Roundup on freshwater microbial communities: a mesocosm study.
  3. New evidence on the impact of Roundup (glyphosate formulation) on the periphyton community and the water quality of freshwater ecosystems
  4. Loss of glyphosate through runoff and its relationship with phosphorus fertilization.
  5. Consequences of the application of phosphate in the absorption of glyphosate by the roots: Impacts for environmental management practices.
  6. Glyphosate Losses due to Drainage and Runoff in Molisols under Direct Sowing.

Source: Latin American Summary

Video: What Should We Know About Weed Killers Including Roundup And Glyphosate? (October 2020).