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Dicamba is toxic to conifer species but is in general less toxic to grasses. [2] Dicamba is a synthetic auxin that functions by increasing plant growth rate, leading to senescence and cell death. [2] [11] The growth regulating properties of dicamba were first discovered by Zimmerman and Hitchcock in 1942. [12]
From the late 1970s to 2016, there was a 100-fold increase in the frequency and volume of application of glyphosate-based herbicides (GBHs) worldwide, with further increases expected in the future. Glyphosate is absorbed through foliage, and minimally through roots, and from there translocated to growing points.
In 2015, Monsanto released crop seed varieties resistant to both dicamba and glyphosate, allowing for use of a greater variety of herbicides on fields without harming the crops. By 2020, five years after the release of dicamba-resistant seed, the first example of dicamba-resistant Palmer amaranth was found in one location. [74]
Chemical structure of Dicamba, 3,6-dichloro-2-methoxybenzoic acid. Dicamba drift is a particular problem, as has been recognized since at least 1979. [20] The effects have been noted for many crops: grapes, tomatoes, soybeans. [21] [22] In 2017, Dicamba-resistant soybeans and cotton were approved for use in the US. This new technology worsened ...
The ruling bars farmers from spraying dicamba products in the upcoming growing season unless the EPA allows them to use stocks of the herbicide that have already been shipped, said Meredith ...
A manual backpack-type sprayer Space treatment against mosquitoes using a thermal fogger Grubbs Vocational College students spraying Irish potatoes. Pesticide application is the practical way in which pesticides (including herbicides, fungicides, insecticides, or nematode control agents) are delivered to their biological targets (e.g. pest organism, crop or other plant).
The other auxin now used in comparable amounts to 2,4-D is dicamba, where the 2019 figure was 30,000,000 pounds (14,000,000 kg). [7] It is a benzoic acid rather than a phenoxyacetic acid whose use has grown rapidly since 2016 as crops genetically modified to be resistant to it have been cultivated.
Editor's note: Annual percentage yields shown are as of Friday, January 17, 2024, at 8:10 a.m. ET. APYs and promotional rates for some products can vary by region and are subject to change.