pigweed
noun
pig·weed ˈpig-ˌwēd 
: any of various vigorous weedy plants especially of the goosefoot or amaranth families
Example Sentences
Recent Examples on the Web Ultimately, Roundup was no match for the pigweed’s evolutionary vitality. 
New York Times, 11 Aug. 2021 Then, once applications of Roundup annihilated all the weeds in a field except the resistant Palmer amaranth, the pigweed could spread without competition. New York Times, 11 Aug. 2021 Peppers and Pigweed Leafminers preferred both pigweed (also called amaranthus) and ragweed to pepper plants in a study at the Coastal Plains Experiment Station in Tifton, Georgia. The Editors, Good Housekeeping, 24 Apr. 2020 Some farmers who plant dicamba-tolerant soybeans and cotton say dicamba's use during the height of the growing season is their only defense against pigweed, an invasive plant that has mutated and has become resistant to glyphosate herbicides. Stephen Steed, Arkansas Online, 20 Dec. 2019 The Palmer amaranth, a type of pigweed that was originally native to the deserts of Mexico and the southwestern U.S., can out-compete most commercial crops, is highly resistant to common herbicides and can be toxic to livestock. Gregory B. Hladky, courant.com, 12 Aug. 2014 Terrance Hurley Department of Applied Economics University of MinnesotaAdler’s characterization of ragweed and pigweed (Palmer amaranth) as monsters is plain silly. The Editors, Scientific American, 1 Sep. 2011 The scientists are testing the machine on a range of species, including pigweed. Brooke Borel, Scientific American, 18 June 2018 Weed scientist Muthu Bagavathiannian had no trouble finding herbicide-resistant pigweed, which can produce up to a million seeds per plant compared to cotton’s 200 to 300. Lynn Brezosky, San Antonio Express-News, 5 July 2018 See More
New York Times, 11 Aug. 2021 Then, once applications of Roundup annihilated all the weeds in a field except the resistant Palmer amaranth, the pigweed could spread without competition. New York Times, 11 Aug. 2021 Peppers and Pigweed Leafminers preferred both pigweed (also called amaranthus) and ragweed to pepper plants in a study at the Coastal Plains Experiment Station in Tifton, Georgia. The Editors, Good Housekeeping, 24 Apr. 2020 Some farmers who plant dicamba-tolerant soybeans and cotton say dicamba's use during the height of the growing season is their only defense against pigweed, an invasive plant that has mutated and has become resistant to glyphosate herbicides. Stephen Steed, Arkansas Online, 20 Dec. 2019 The Palmer amaranth, a type of pigweed that was originally native to the deserts of Mexico and the southwestern U.S., can out-compete most commercial crops, is highly resistant to common herbicides and can be toxic to livestock. Gregory B. Hladky, courant.com, 12 Aug. 2014 Terrance Hurley Department of Applied Economics University of MinnesotaAdler’s characterization of ragweed and pigweed (Palmer amaranth) as monsters is plain silly. The Editors, Scientific American, 1 Sep. 2011 The scientists are testing the machine on a range of species, including pigweed. Brooke Borel, Scientific American, 18 June 2018 Weed scientist Muthu Bagavathiannian had no trouble finding herbicide-resistant pigweed, which can produce up to a million seeds per plant compared to cotton’s 200 to 300. Lynn Brezosky, San Antonio Express-News, 5 July 2018 See More Word History
First Known Use
circa 1801, in the meaning defined above
Medical Definition
pigweed
noun
pig·weed ˈpig-ˌwēd
: any of several plants of the genus Amaranthus (as A. retroflexus and A. hybridus) with pollen that acts as a hay fever allergen