A group of American scientists from the universities of Missouri, Illinois, North Dakota and other scientific institutions found that glyphosate, the world’s most popular herbicide, has lost its effectiveness against dozens of weed species. The study was published in the scientific journal magazine PNAS Port.
For decades, glyphosate and glyphosate-based products have remained the primary weed control method for corn and soybeans worldwide. As of 2014, more than 90% of the hectares of these two crops were planted with glyphosate-resistant varieties. More than 130 thousand tons of products are used annually in the USA and Canada alone.
At the same time, there were 354 confirmed cases of glyphosate resistance in 57 weed species worldwide from 1996 to 2021.
The authors of the new study analyzed the results of herbicide tests against seven weeds (Theophrastus, Palmer acorn, tuberculosis, ragweed, ragweed, ragweed, pigweed, and little petal) over the specified period.
They found that over the past 25 years, the effectiveness of these chemicals has decreased by an average of 2.4% to 31.6% per decade. The best resistance to glyphosphate was developed in Canadian small petal, exceeding 31%.
Simulation studies have shown that overuse of glyphosate can lead to the emergence of glyphosate resistance within 8-12 years after initial use.
Scientists have found that some weeds have learned to resist glyphosate by increasing their biomass. Therefore, standard doses of the chemical will no longer be able to kill weeds effectively.
Previously in Russia developed A new way to rid soil of herbicides.
Source: Gazeta
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