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In agricultural parlance, desiccation is divided into two distinct groups: "true desiccants" and pre-harvest systemic herbicides. [14] [15] True desiccants are not chemical desiccants, rather they are contact herbicides which kill only the parts of the plant they touch. They induce plant death/defoliation rapidly and dry down occurs within a ...
Glyphosate is also used for crop desiccation to increase harvest yield and uniformity. [57] Glyphosate itself is not a chemical desiccant; rather crop desiccants are so named because application just before harvest kills the crop plants so that the food crop dries from normal environmental conditions ("dry-down") more quickly and evenly.
Glyphosate had been first prepared in the 1950s but its herbicidal activity was only recognized in the 1960s. It was marketed as Roundup in 1971. [17] The development of glyphosate-resistant crop plants, it is now used very extensively for selective weed control in growing crops.
Glyphosate disrupts the ability of most plants to construct new proteins. Glyphosate-tolerant transgenic crops are not affected. [7] A weed family that includes waterhemp (Amaranthus rudis) has developed glyphosate-resistant strains. A 2008 to 2009 survey of 144 populations of waterhemp in 41 Missouri counties revealed glyphosate resistance in 69%.
As of 2005, 87% of U.S. soybean fields were planted with glyphosate resistant varieties. [ 7 ] [ 8 ] While the use of Roundup Ready crops has increased the usage of herbicides measured in pounds applied per acre, [ 9 ] it has also changed the herbicide use profile away from atrazine , metribuzin , and alachlor [ citation needed ] which are more ...
What is glyphosate? “Glyphosate is a widely used herbicide, commonly known under the brand name Roundup,” Jessica Crandall , registered dietitian and founder of Vital RD, tells Yahoo Life.
Monsanto's introduction of this system (planting a glyphosate-resistant seed and then applying glyphosate once plants emerged) allowed farmers to increase yield by planting rows closer together. [116] Without it, farmers had to plant rows far enough apart to allow the control of post-emergent weeds with mechanical tillage. [116]
AMPA is one of the primary degradation products of the herbicide glyphosate. [4] [1] In addition, it is a degradation product of other aminophosphonates, which have applications as antiscalant and water treatment. [5] AMPA was found in the final effluent of some wastewater treatment plants at concentrations of up to 10μg/l. [6]
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