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2. Glyphosate - Wikipedia

   en.wikipedia.org/wiki/Glyphosate

   Monsanto developed and patented the use of glyphosate to kill weeds in the early 1970s and first brought it to market in 1974, under the Roundup brandname. [27] [28] While its initial patent [29] expired in 1991, Monsanto retained exclusive rights in the United States until its patent [30] on the isopropylamine salt expired in September 2000. [31]

3. Roundup (herbicide) - Wikipedia

   en.wikipedia.org/wiki/Roundup_(herbicide)

   Monsanto also produced seeds which grow into plants genetically engineered to be tolerant to glyphosate, which are known as Roundup Ready crops. The genes contained in these seeds are patented. Such crops allow farmers to use glyphosate as a post-emergence herbicide against most broadleaf and cereal weeds.

4. Glyphosate-based herbicides - Wikipedia

   en.wikipedia.org/wiki/Glyphosate-based_herbicides

   Glyphosate-based herbicides are herbicides made of a glyphosate salt usually combined with other ingredients needed to stabilize the formula and allow penetration into plants. Roundup was the first glyphosate-based herbicide, developed by Monsanto in the 1970s.

5. Plea to end use of glyphosate weed killer - AOL

   www.aol.com/news/plea-end-glyphosate-weed-killer...

   A motion to restrict the use of weed killer glyphosate is set to go before a council. ... The chemical is a powerful herbicide that kills most plants, but there is concern about its wider impact ...

6. Herbicide - Wikipedia

   en.wikipedia.org/wiki/Herbicide

   Plants developed resistance to atrazine and to ALS-inhibitors relatively early, but more recently, glyphosate resistance has dramatically risen. Marestail is one weed that has developed glyphosate resistance. [69] Glyphosate-resistant weeds are present in the vast majority of soybean, cotton and corn farms in some U.S. states.

7. Cash-strapped US farmers switch to generic crop chemicals, in ...

   www.aol.com/news/cash-strapped-us-farmers-switch...

   The patent for glyphosate, the active ingredient in Roundup and the world's most widely used herbicide, expired in 2000, according to Rabobank agricultural analysts Owen Wagner and Sam Taylor.