Spiny amaranth

Amaranthus Palmeri S. Wats., Palmer amaranth, is a coarse, weedy, drought-resistant, dioecious member of the Amaranthaceae and is related to A. retroflexus L., redroot pigweed, and the ornamentals k. tricolor L., sumner poinsettia, and /. caudatus L., love-lies-bleeding. Palmer amaranth was used by natives of the North American desert as a protein source and cereal to supplement maize and beans. Another member of the same family, A. spinosus L., spiny amaranth, has been reported to exhibit allelopathic activity toward coffee... 

Field workers also may be injured by weeds with spiny or thorny protrusions, burs, or needles that penetrate the skin. Examples include starbur, spiny amaranth, itchgrass, smooth pricklypoppy, and other weedy species with burs or spines. Some weeds may cause allergies in some workers, resulting in lost productivity. 

The herbicidal activity and corp selectivity of IG-21 (code number for development HWS) were further examined at 1,200-50 g ai/ha. IG-21 was tested for postemergence activity against a range of plant species including purslane (Portulaca oleracea), slender amaranth (Amaranthus ascendens), goosefoot (Chenopodium album), spiny amaranth Amaranthus spinosus), sugarbeet Beta vulgaris), maize Zea mays) and rice Oryza sativa). Results are shown in Table 2.50. 

Por purslane Amaislender amaranth Che goosefoot Ams spiny amaranth Bet sugarbeet Zea maize Ory rice... 

Amaranthus spinosus prickly amaranth spiny amaranthus... 

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