Sorghum arundinaceum (Desv.) Stapf

Benin: Sorghum arundinaceum flowers from March to December

Sorghum arundinaceum can be confused with S. halepense, but the latter is perennial and quickly forms strong underground rhizomes. In addition, S. halepense is more drought and cold tolerant than S. arundinaceum. However, both can be found in the tropics.

Benin: A species of fallow land, alluvial plains and lowlands.
Comoros: Sorghum arundinaceum is a species of lowland remained fresh in the dry season.
Madagascar: A weed that grows in humid shallows and in depressions or low areas of alluvial plains in dry areas (semiarid: West and South West Madagascar) of low altitude. The floors of these stations are vertisols alluvial, clay loam or ferruginous deep and fertile hydromorphes.
Mauritius: ruderal species and occasional weed of cultivated fields. It is common all over the island but more common in less humid and in dry areas.
Reunion: This species appreciates moderately humid climates and grows in the lowland remaining fresh  and on the silty-sandy alluvials or silty rivers. In Reunion, it is a widespread and locally abundant species in the North and Northeast, the alluvial plains of the West and South. It can form small stands, particularly in the area of ​​400-600 m from the southwest.
Seychelles: This species has been observed in a few sites scattered both at low and high altitude.
West Indies: Sorgum arundinaceum is an exotic species. It occupies all types of soil in sunny urban and rural environments. It is very common along roadsides and fields in association with other tall grasses (Panicum maximum, Paspalum spp.). It is not very demanding on soil quality and grows on both degraded, fertile and temporarily flooded soils.
 

Local harmfulness

Benin: Sorghum arundinaceum is common and scarce.
Comoros: Species uncommon but can be locally abundant, mainly a ruderal plant.
Ivory Coast: Frequent and scarce.
Madagascar: It is a weed of quite low frequency but locally abundant. It is very invasive in favorable soil depressions, due to his short but powerful rhizomes (like storage organ) and of its germination and rapid growth and can quickly smother crops (rainy season) poorly maintained: Noxious weed in cotton cultivation and maize.
Mauritius: A weed whose sparse presence in the cane fields is annoying, but compete very weakly with culture. It is rare in other cultures.
Reunion: It is a common weed of sugarcane. It is present in 38% of sugarcane plots. However its growth is limited between 1 and 15% covering.
Seychelles: S. arundinaceum is an occasional serious weed of crops, but only in specific areas of a few operations of low altitude.
Tanzania: Rare and scarce.
West Indies: Sorghum arundinaceum is an uncommon weed but very damaging to all crops. It forms locally large stands that prevent the development of cultivated plants. Tillage favours grain germination on soils previously infested by this plant. 

Feed: Sorghum arundinaceum is used as fodder for cattle.
Medicinal: The macerated leaves are administered against metrorrhagia in pregnant women (Benin).

Global control
 
For weed control tips for annual grass in irrigated rice and lowland in Africa, visit: http://portal.wiktrop.org/document/show/31
 
Local control
 
Reunion : View the Website of CaroCanne (The online magazine of sugarcane workers in Reunion ) ;
Technical specification n°34
West Indies: The control of Sorghum arundinaceum requires the implementation of a specific weed control.
 

Herbarium pictures ReCOLNAT: https://explore.recolnat.org/search/botanique/simplequery=Sorghum%2520arundinaceum