CABI is a registered EU trademark. Chen T B, Lin C, 1989. Sauer JD, 1967. Tests have shown that over 50% of waterhemp seeds remain viable after one year. by Tutin TG, Burges NA, Chater AO, Edmondson JR, Heywood VH, Moore DM, Valentine DH, Walters SM, Webb DA]. Scientific Names: Redroot pigweed, Amaranthus retroflexus L., Green pigweed, Amaranthus powelli S. Psilotaceae to Platanaceae, Volume 1 (2nd edition) [ed. Flowers vary interspecifically from the presence of 3 or 5 tepals and stamens, whereas a 7-porate pollen grain structure remains consistent across the family. Powell amaranth (A. powelii) 4. Alien plants at Foynes Port, Co. Selected Weeds of the United States. A catalogue of problem plants in southern Africa incorporating the national weed list of South Africa. Phytoindication of hydrogenous and haloid landscapes interrelations in Uzbekistan. Cambridge, UK: Cambridge University Press. Weed Herbarium – by Scientific Name. Virtually every farmer in North America knows and grapples with pigweed, a term that covers several species in the genus Amaranthus, including: 1. redroot pigweed (A. retroflexus) 2. smooth pigweed (A. hybridus) 3. Seeds of redroot pigweed, wild mustard, shepherd's-purse, and field pepperweed often have seed coats impermeable to water, oxygen, or both.The seeds are called “hard.” It is another dormancy mechanism. 21 (3), 283-285. Torres MB, Kommers GD, Dantas AFM, Lombardo de Barros CS, 1997. Inflorescences are usually densely crowded. Leaves are 0.8 to 3.9 inches long. top Stevens C, Khan V A, Okoronkwo T, Tang A H, Wilson M A, Lu J, Brown J E, 1990. Contributions to the botany and nutritional value of some wild Amaranthus species (Amaranthaceae) of Nuevo Leon, Mexico. Other symptoms, such as bloat or methylglobineamia in the most severe cases, might reflect its high nitrate content. The seed of Redroot Pigweed are the first of the three pigweeds to mature. Zhang WM, McGiffen MEJr, Becker JO, Ohr HD, Sims JJ, Kallenbach RL, 1997. Problems of Desert Development. Species across the genus contain concentric rings of vascular bundles, and fix carbon efficiently with a C4 photosynthetic pathway. Collingwood, Vic. A geographic atlas of world weeds. Limerick (v.c. The plant is monoecious, with individuals bearing both male and female flowers. Common names: Redroot pigweed, Carelessweed, Redroot Amaranth: Higher taxon Tashmatov Kh M, 1992. Madrono, 13:5-46. The grain amaranths and their relatives: A revised taxonomic and geographic survey. Australia: CSIRO Publishing. H8), 1988-1994. 44. Further studies on oxalic acid biosynthesis in oxalate-accumulating plants. Weed Research (Oxford). 60 (4), 1215-1234. © Copyright 2020 CAB International. Wats., Other Names: Redroot pigweed is also called amarante à racine rouge, Green amaranth, Pigweed, Redroot, Rough pigweed, Tall pigweed, amarante réfléchie, amarante pied rouge. Limerick (v.c. It has several common names, including carelessweed, dioecious amaranth, Palmer's amaranth, Palmer amaranth, and Palmer's pigweed.It is native to most of the southern half of North America. The inflorescence is a large, dense cluster of flowers interspersed with spiny green bracts. This plant is eaten as a vegetable in different places of the world. Good control effects of glyphosate on weeds in late growth period maize in the field interplanted with wheat. It thrives in open, sunny places inhabiting agricultural land … Phytocoenological features and control strategies of weeds. 23 (3), 167-171. Stevens C, Khan VA, Okoronkwo T, Tang AH, Wilson MA, Lu J, Brown JE, 1990. Problems of Desert Development, 2:51-54. Weed Science Society of America. Reading Time: 2 minutes Redroot pigweed can be a tough customer. [6], Like many other species of Amaranthus, this plant may be harmful and even deadly when fed to cattle and pigs in large amounts over several days. Common Name(s): Redroot Pigweed, Rough Pigweed, Pigweed,Redroot: Scientific Name: Amaranthus retroflexus: Family: Amaranthaceae: Longevity: Annual: Season: Common Name Reference: Weed Science Society of America Common Names List Scientific Name Reference: PLANTS Database. Feeding in the pigweed flea beetle, Disonycha glabrata Fab. Virginia Journal of Science, 41(3):243-245. Stems erect, 10 cm - 2 m high, but usually 50 - 90 cm, simple or branched, lower part thick and smooth, upper part usually rough with dense short hair, greenish to slightly reddish but usually red near the roots. Memoirs, Botanical Survey of South Africa. Soil solarization and Dacthal: influence on weeds, growth, and root microflora of collards. The biology of Canadian weeds. HortScience. Seizie^grave~me confe^acute~rence du COLUMA. Weed Research (Oxford), 37(3):181-189; 30 ref. Other common names for redroot pigweed include redroot amaranth, careless weed, and rough pigweed. 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