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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]
Pesticides, because they are toxic chemicals meant to kill pest species, can affect non-target species, such as plants, animals and humans. Over 98% of sprayed insecticides and 95% of herbicides reach a destination other than their target species, because they are sprayed or spread across entire agricultural fields. [ 1 ]
Dicamba is a selective and systemic herbicide that kills annual and perennial broadleaf weeds. [10] Its primary commercial applications are weed control for grain crops and turf areas. It is also used to control brush and bracken in pastures, as well as controlling legumes and cacti .
2,4-Dichlorophenoxyacetic acid is an organic compound with the chemical formula Cl 2 C 6 H 3 OCH 2 CO 2 H.It is usually referred to by its ISO common name 2,4-D. [4] It is a systemic herbicide that kills most broadleaf weeds by causing uncontrolled growth, but most grasses such as cereals, lawn turf, and grassland are relatively unaffected.
Undistilled mustard gas contains 20–30% impurities, which means it does not store as well as HD. Also, as it decomposes, it increases in vapor pressure, making the munition it is contained in likely to split, especially along a seam, releasing the agent to the atmosphere. [1] HD – Codenamed Pyro by the British, and Distilled Mustard by the ...
Mechanical and physical weed control practices used on organic farms can be broadly grouped as: [60] Tillage - Turning the soil between crops to incorporate crop residues and soil amendments; remove existing weed growth and prepare a seedbed for planting; turning soil after seeding to kill weeds, including cultivation of row crops.
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