AMAGR
Growth form
Broadleaf
Biological cycle
Annual
Habit
Terrestrial
synonym | Amaranthus angustifolius Lam. |
synonym | Amaranthus aschersonianus (Thell.) Chiov. |
synonym | Amaranthus blitum Baker & Clarke |
synonym | Amaranthus blitum Moq. |
synonym | Amaranthus blitum var. angustifolius Moq. |
synonym | Amaranthus blitum var. graecizans (L.) Moq. |
synonym | Amaranthus blitum var. silvestris (Vill.) Moq. |
synonym | Amaranthus graecizans var. latifolia Frenzel |
synonym | Amaranthus graecizans var. pachytepalus Aellen |
synonym | Amaranthus hierichuntinus Vis. |
synonym | Amaranthus paolii Chiov. |
synonym | Amaranthus parvifolius Sennen & Gonzalo |
synonym | Amaranthus parvulus Peter |
synonym | Amaranthus polygonoides Roxb. |
synonym | Amaranthus roxburghianus H. W. Kung |
synonym | Amaranthus silvestris Tourn. |
synonym | Amaranthus sylvestris Desf. |
synonym | Amaranthus tenuifolius Willd. |
synonym | Amaranthus thellungianus Nevski |
synonym | Amaranthus thunbergii subsp. grandifolius Suess. |
synonym | Amaranthus viridis subsp. graecizans (L.) Nyman |
synonym | Blitum graecizans (L.) Moench |
synonym | Galliaria graecizans (L.) Nieuwl. |
synonym | Galliaria sylvestris (Vill.) Bubani |
synonym | Glomeraria graecizans (L.) Cav. |
synonym | Mengea tenuifolia (Willd.) Moq. |
synonym | Pyxidium graecizans (L.) Moq. |
synonym | Pyxidium sylvestre (Vill.) Montandon |
Arabic |
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English |
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Italian |
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Portuguese |
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Spanish; Castilian |
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Leaf
The leaves are simple, alternate and more or less petiolate. They are of very variable form. They are 2 to 6 cm long and 8 to 15 mm wide. The petiole is 1 to 3 cm long. The limb is obovate to elliptical or almost linear. The base is attenuated in corner and the apex is emarginated presenting a little and visible mucro. The margin is entire. Both sides are glabrous and gray-green in color. The upper face is traversed by 2 to 5 lateral nerves pennate to weakly arched.
Inflorescence
The flowers are assembled in small dense glomeruli at the axils of the leaves or along spike-like axillary branches. These glomeruli measure 4 to 5 mm in diameter.
Flower
The flowers are green, very small and without petals. They have 3 lanceolate sepals, 1 to 1.5 mm long and pointed at the top.
Fruit
The fruits are ovoid dehiscent capsules, 1.3 mm high and 1 mm wide. They open with a hat made of the upper third of the capsule. The outer tegument is decorated with many wavy longitudinal wrinkles. Each capsule contains one seed.
Seed
The seed is disc-shaped, slightly convex in the central part. It measures 1 mm in diameter. She is black and shiny.
Attributions | |
Contributors | |
Status | UNDER_CREATION |
Licenses | CC_BY |
References |
Algeria: Amaranthus graecizans germinates in late spring and throughout the summer; flowering takes place from May to October.
Northern Cameroon: Amaranthus graecizans is present throughout the rainy season, but is more frequent and more abundant at the beginning of the crop cycle. Germination begins after plowing and lasts for 1 to 2 weeks. New germination phases take place after each cultural operation (weeding, hilling). Flowering begins 3 to 5 weeks after emergence and fruiting 2 weeks later. Fruiting and seed dispersal takes place in July in non-weeded plots or from September on regular weeded plots. They dy at the end of the rainy season in October or November. The complete life cycle of A. graecizans lasts 4 to 5 months when it starts at the beginning of the rainy season and is reduced to 2 months when it starts in the middle of the rainy season. This reduction in the length of the cycle at the end of the season is linked to the decrease in the length of the day.
Morocco: Amaranthus graecizans flowers and fruits from May to October.
Attributions | Wiktrop |
Contributors | |
Status | UNDER_CREATION |
Licenses | CC_BY |
References |
Amaranthus greacizans is a C4 species.
Attributions | Wiktrop |
Contributors | |
Status | UNDER_CREATION |
Licenses | CC_BY |
References |
Algeria: Amaranthus graecizans is a common summer species in vegetable crops, orchards and vineyards throughout the country. It grows on sandy loam to clay soils, rich in nitrogen in sunny places.
Northern Cameroon: Amaranthus graecizans is a ruderal nitrophile species, which grows along roadsides, in wastelands and near villages. It is also a weed of annual crops. It grows mainly in well-structured soils such as non-degraded ferruginous soils or alluvial soils, but is infrequent in very clay soils such as vertisols.
Morocco: Amaranthus graecizans is a nitrophilous species common in irrigated crops, wasteland, wet ruderalized areas and wadi beds.
Attributions | Wiktrop |
Contributors | |
Status | UNDER_CREATION |
Licenses | CC_BY |
References |
Origin
Amaranthus graecizans is a species of paleotropical origin.
Worldwide distribution
This species is widespread throughout Africa, Europe and Asia. It has been introduced into Northern Europe, North America, Australia and New Zealand.
Algeria: Common species throughout the country up to the central Sahara.
Attributions | Wiktrop |
Contributors | |
Status | UNDER_CREATION |
Licenses | CC_BY |
References |
Local harmfulness
Algeria: Amaranthus graecizans is a major "weed". It is one of the most harmful species of crops because it can colonise practically all ecological environments (very frequent species), and its great adaptation to the agricultural environment gives it a very high potential for invading (very high seed production) plots (very abundant species). Plant with allergenic pollen.
Northern Cameroon: In Northern Cameroon, Amaranthus graecizans is present in 20% of cultivated plots. The frequency of this species and its abundance are higher in the Sudanian region, particularly in plots cultivated for more than 10 years and subject to intensive cultivation practices including tilled plowing and especially heavy mineral manures (200 to 300 kg of wheat). fertilizer per hectare).
Morocco: Amaranthus graecizans is a common weed in irrigated crops.
Attributions | Wiktrop |
Contributors | |
Status | UNDER_CREATION |
Licenses | CC_BY |
References |
Local control
Algeria: In greenhouse crops, the practice of solarization, a destocking technique, gives excellent results. About chemical control, Amaranthus graecizans is not sufficiently sensitive to 2,4-D which only gives good results as a pre-emergence treatment and on young seedlings. Active ingredients such as bentazone, diuron, glufosinate ammonium, linuron, oxyfluorfen, metribuzin, paraquat (severely restricted use), pendimethalin, prometryne, propyzamide, trifluralin, etc. easily control adult individuals.
Attributions | Wiktrop |
Contributors | |
Status | UNDER_CREATION |
Licenses | CC_BY |
References |
Attributions | |
Contributors | |
Status | UNDER_CREATION |
Licenses | CC_BY |
References |
Herbarium pictures ReCOLNAT: https://explore.recolnat.org/search/botanique/simplequery=Amaranthus%2520graecizans
Attributions | |
Contributors | |
Status | UNDER_CREATION |
Licenses | CC_BY |
References |
Root | Root |
Kingdom | Plantae |
Phylum | Tracheophyta |
Class | Magnoliopsida |
Order | Caryophyllales |
Family | Amaranthaceae |
Genus | Amaranthus |
Species | Amaranthus graecizans L. |