Common Pigweed

Pigweed

Pigweed


Common pigweed is a species of Amaranth, also known as Amaranthus palmeri. In the south, farmers sprayed heavily with Roundup (made by Monsanto) to control this variety of pigweed. As a result of this practice, pigweed became immune to Roundup. That’s when growers switched to Dicambra, another Monsanto product.

Glyphosate Chemical

Glyphosate Chemical


The primary chemical in Roundup is glyphosate, which is known to cause cancer. The widespread use of glyphosate has caused many common weeds to become resistant or immune to the chemical. These weeds do not die when sprayed with Roundup. That makes the expensive Roundup-Ready crops a waste of money.

Glyphosate 3D Ball Model

Glyphosate 3D Ball Model


As more farmers use Dicambra on common pigweed, they are often at odds with their neighbors. Dicambra comes in two main formulations from Monsanto. The old formula is inexpensive and tends to drift away from the field when sprayed by airplanes. The drifting cloud can and does easily kill nearby crops. Often these crops belong to neighboring farms.

Dicamba Chemical

Dicamba Chemical


The new formula is much more expensive, drifts less and is made to be used with Dicambra-Ready crops only. The price difference drives many farmers to buy the old formula instead. That is the source of conflict between neighbors that resulted in the Arkansas murder.

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Pigweed Surprising Crop

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Tara Beit

Investigative Reporter at Big Leaf, LLC
I write about physics and biology. Some people think that's weird, but both fields actually have a lot in common. You can't understand photosynthesis without understanding quantum mechanics.

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