Prosopis 
System : Terrestrial
Kingdom
Phylum
Class
Order
Family
Plantae
Magnoliophyta
Magnoliopsida
Fabales
Fabaceae
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Common name
catzimec (Spanish, Mexico), aroma americana (Spanish, Puerto Rico), campeche (English, Guatemala), acacia de Catarina (Spanish, Nicaragua), bayahonde (French, Haiti), algarrobo del Brasil (Spanish, Cuba), bayahonde (Spanish, Dominican Republic, Puerto Rico), bayawonn (English, Haiti), screwbeans (English, America), spinho (English, Cape Verde), bohahunda (Spanish, Dominican Republic), belari jari (Tamil, India), aroma (Spanish, Colombia, Philippines, Puerto Rico), anchipia guaiva (Spanish, Colombia, Philippines, Puerto Rico), taco (English, Peru), thacco (English, Peru), aromo (Spanish, Panama), bayahonda (Spanish, Dominican Republic), carobier (French, Marquesas), bayahon (Spanish, Dominican Republic), wawahi (English, Curação), algarobeira (Portuguese, South America), bayahonda blanca (Spanish, Dominican Republic), algarrobo (Spanish, South America), mastuerzos (Spanish, America), tornillos (Spanish, America), yaque negro (Spanish, Venezuela), espino negro (Spanish, Nicaragua), chachaca (Spanish, Cuba, Mexico), chambron (Spanish, Haiti), caóbano gateado (Spanish, Venezuela), carbón (Spanish, El Salvador), espinheiro (Portuguese, Cape Verde), espino ruco (Spanish, Honduras), cujicarora (Spanish, Venezuela), cashaw (English, Jamaica), espino real (Spanish, Honduras), nacasol (Spanish, Guatemala), vilayati khejra (Hindi, India), cashew (English, Jamaica), cují amarillo (Spanish, Venezuela), cují negro (Spanish, Colombia, Venezuela), cují yague (Spanish, Venezuela), cují yaque (Spanish, Colombia, Venezuela), vilayati kikar (Punjabi, India, Pakistan), nacascol (Spanish, Guatemala), mugun kawa (Hausa, Niger), gando baval (Gujrati, India), eterai (Swahili, Kenya), ghaf (Arabic, Middle East states), shouk shami (Arabic, Iraq), shejain kawa (Hausa, Niger), vilayati jand (Punjabi, Pakistan), palo de campeche (Spanish, Guatemala), plumo de oro (Spanish, Cuba), vallahonda (Spanish, Dominican Republic), velikaruvel (Tamil, India), uweif (Arabic, Abu Dhabi), trupillo (Spanish, Colombia), trupi (Spanish, Colombia), velimullu (Tamil, India), bayarone (English, Haiti), vilayati babool (Hindi, India), yaque blanco (Spanish, Venezuela), Mexican thorn (English, Ascension Island), yaque (Spanish, Venezuela), algarrobo forragero (Spanish, Colombia), guatapaná (Spanish, Cuba, Haiti), vilayati babul (Punjabi, India, Pakistan), qui (English, Curação), dakkar toubab (English, Senegal), baron (English, Haiti), angrezi bavaliya (English, India), bayahon (English, Haiti), mesquit-tree (English, Trinidad and Tobago), gaudi maaka (English, Mali), algarroba (English, Virgin Islands), algarrobo americano (Spanish, Puerto Rico), mesquite (Spanish, Colombia, Puerto Rico, Mexico), lebi (English, Somalia), huarango (English, Peru), cuida (English, Curação), guarango (English, Peru), aguijote negro (Spanish, Nicaragua), algarroba (Spanish, Mexico, Puerto Rico), algaroba (English, Hawaii), kiawe (Hawaiian, Hawaii), mathenge (Swahili, Kenya), indjoe (English, Curação), indju (English, Curação), mareño (Spanish, Mexico), kuigi (English, Curação), mesquite (English, Australia, Bahamas, Hawaii, North America, Sudan, South Africa), maíz criollo (Spanish, Venezuela), manca-caballo (Spanish, Colombia, Panama), arómo (Spanish, Costa Rica), bayahonde française (French, Haiti), bayawonn française (English, Haiti), cambrón (Spanish, Cuba, Dominican Republic, Puerto Rico), cojí wawalú (English, Curação), cují (Spanish, Colombia, Venezuela), mezquite (Spanish, Dominican Republic, Mexico, Puerto Rico, North America)
Synonym
Similar species
Acacia farnesiana, Acacia paradoxa, Acacia nilotica ssp. indica, Parkinsonia aculeata
Summary
Members of the genus Prosopis spp., which are commonly known as mesquite or algarrobo, include at least 44 defined species and many hybrids. This leads to problems with identification. For this reason, information about different species in the Prosopis genus is presented in this genus-level profile. Native to the Americas, Prosopis species are fast growing, nitrogen fixing and very salt and drought tolerant shrubs or trees. Most are thorny, although thornless types are known. Animals eat the pods and may spread seeds widely. Trees develop a shrubby growth form if cut or grazed. The four main species that have presented problems as weeds world-wide are P. glandulosa and P. velutina in more subtropical regions and P. juliflora and P. pallida in the truly tropical zone.
Species Description
Mesquites (Prosopis spp.) and thorny shrubs/trees that grow to about 3 metres but can reach 15 metres. P. pallida has a main single stem and spreading canopy, P. velutina is a compact shrub while the hybrids generally grow as smaller multi-stemmed trees with branches drooping to the ground. Trees can appear rather untidy, with zigzag shaped branches. Leaves are fernlike and vary in shape depending on the species. Foliage is usually dark green but can be blue-green. Spines range in size from 4-75mm long and contribute to form impenetrable barriers (Agriculture & Resource Management Council of Australia & New Zealand, 2000). Prosopis are phreatophytes with deep tap roots. This enables trees to remain green during droughts as they can access the water table. Lateral roots draw on surface water during the rains and, in common with other desert specialised palnts, leaf adaptations reduce water loss (Pasiecznik 1999).\n
Burkart (1976) divided the genus into five sections mainly based on floral characteristics. The African section Anonychium contains a solitary, non-thorny species. The three species of the Asiatic section Prosopis all have internodal prickles, similar to those found on roses (Rosa spp.). The nine species of section Strombocarpa have spiny stipules with closed spiralled legumes, whereas the thirty species of section Algarobia have cauline, mostly axillary thorns. In between these latter two sections is the single member of section Monilicarpa (Pasiecznik 2001).
Burkart (1976) divided the genus into five sections mainly based on floral characteristics. The African section Anonychium contains a solitary, non-thorny species. The three species of the Asiatic section Prosopis all have internodal prickles, similar to those found on roses (Rosa spp.). The nine species of section Strombocarpa have spiny stipules with closed spiralled legumes, whereas the thirty species of section Algarobia have cauline, mostly axillary thorns. In between these latter two sections is the single member of section Monilicarpa (Pasiecznik 2001).
Notes
The origin of Prosopis given by Perry (1998) was ‘towards abundance’, from the Greek word ‘pros’, meaning ‘towards’, and ‘Opis’, wife of Saturn, the Greek goddess of abundance and agriculture. The name ‘mesquite’ originates from the original Nahuatl Indian name from Mexico, ‘misquitl’ meaning ‘bark that tans’ (Maldonado 1990, in Pasiecznik 2001). In South America, the first Prosopis seen by the invading Spaniards were called ‘algarrobo’, because of the observed similarity between these and the carob (Ceratonia siliqua) of the Mediterranean basin, both with similar, sweet edible pods (D’Antoni and Solbrig 1977, Cruz 1999, in Pasiecznik 2001).
Lifecycle Stages
Flowering: Different populations of all species vary in the onset of flowering due to climatic variation, however, flowering is also variable within and between trees in the same population. Almost cntinuous flowering of P. juliflora is observed in Brazil, India and Haiti (Silva 1990b, Goel and Behl 1995, Timyan 1996, in Pasiecznik 2001). Prosopis flowers are produced in masses, mainly on spike-like racemes
Pollination: Prosopis species are generally assumed to be self-incompatible, and are primarily insect pollinated. Flowers attract large numbers of potential pollinators with the production of copious amounts of pollen, which contains starch and other nutrients for insects; in particular, bees are intimately associated with legume pollination (Hoc et al 1994, Arroyo 1981, in Pasiecznik 2001). Many oligolectic bees are small in size with small flight ranges, and cross pollination is thought to be by larger species of bee. Increased pollination is noted in honey producing areas and is seen to have positive effects on fruit production (Esbenshade 1980, in Pasiecznik 2001).
Fruiting: Prosopis species produce pods, which ripen at different times of the year depending on the species and climate. Fruit maturation causes an abscission layer to form at the base of the pedicel and the pods fall to the ground within one to three months in most species. After falling, the seeds become components of the seed bank and are subject to physical and environmental factors and dispersal. Reports show that when collected and stored, seed of Prosopis species can remain viable for considerable periods of time, up to 50 years for P. velutina; seeds of several species have maintained more than 50% viability over 10 to 15 years when stored in their pods; reports of conservation in the soil seed bank are variable with two and 10 years given for P. velutina (Glendening and Paulsen 1955, Pasiecznik and Felker 1992, in Pasiecznik 2001).
Pollination: Prosopis species are generally assumed to be self-incompatible, and are primarily insect pollinated. Flowers attract large numbers of potential pollinators with the production of copious amounts of pollen, which contains starch and other nutrients for insects; in particular, bees are intimately associated with legume pollination (Hoc et al 1994, Arroyo 1981, in Pasiecznik 2001). Many oligolectic bees are small in size with small flight ranges, and cross pollination is thought to be by larger species of bee. Increased pollination is noted in honey producing areas and is seen to have positive effects on fruit production (Esbenshade 1980, in Pasiecznik 2001).
Fruiting: Prosopis species produce pods, which ripen at different times of the year depending on the species and climate. Fruit maturation causes an abscission layer to form at the base of the pedicel and the pods fall to the ground within one to three months in most species. After falling, the seeds become components of the seed bank and are subject to physical and environmental factors and dispersal. Reports show that when collected and stored, seed of Prosopis species can remain viable for considerable periods of time, up to 50 years for P. velutina; seeds of several species have maintained more than 50% viability over 10 to 15 years when stored in their pods; reports of conservation in the soil seed bank are variable with two and 10 years given for P. velutina (Glendening and Paulsen 1955, Pasiecznik and Felker 1992, in Pasiecznik 2001).
Uses
Prosopis trees are the source of multi-purpose valuable products. Fruit pods are high in sugar and protein and are a rich food source for man and beast. Honey produced from Prosopis flowers is of high quality, as is gum. Prosopis products have added value if processed, such as by turning firewood to finished timber or into furniture. Larger branches and trunks yield a high quality timber comparable in attributes to Indian rosewood or other commercial hardwoods (Pasiecznik 2001 2002b). While shrub species can not be used for timber production they may be browsed occasionally by stock and their leaf litter improves soil quality (Pasiecznik 1999).\r\n
In the Americas, the origin of some Prosopis species, there is a history of using all tree parts; for example, tree products from P. pallida include wood (for timber, posts, poles, chips, charcoal, firewood); pods (for fodder, flour, syrup, honey, resin gums, fibers, tannins and medicines). From Mexico to Peru, people have developed local economies based Prosopis juliflora and its products. Pods are stored year-round for fodder and may be made into flour or nutritious syrup. Honey is made and gums are collected. Products are either for family use or for sale in local markets. In Colombia and Venezuela Prosopis is sometimes referred to as ‘maíz criollo’ (‘local maize’), indicating its importance as a nutrient source for either man or animal (Pasiecznik 2002b 2001).\r\n
Trading in products such as wood, food and fodder provides the only source of income for some families in rural India. Prosopis juliflora is almost unsurpassable as a fuel in the dry rural areas of this country, and many small farmers, landless and artisans depend on it to cook all their meals. It is often the main source fuel, small roundwood and dry season fodder, and has been called the \"tree of the poor\" by some, indicating its importance to these people (Pasiecznik 2002a 2002b). Aborigines depend on mesquites to reduce dust in the dry regions of Australia. In the Northern Territory, isolated communities use mesquites to minimise erosion around gold and copper mining areas. The trees are also used in Australia, and elsewhere, to provide shade and fodder for cattle. Apparently mesquite charcoal also releases a fragrant scent when burnt (Agriculture & Resource Management Council of Australia & New Zealand, 2000).
In the Americas, the origin of some Prosopis species, there is a history of using all tree parts; for example, tree products from P. pallida include wood (for timber, posts, poles, chips, charcoal, firewood); pods (for fodder, flour, syrup, honey, resin gums, fibers, tannins and medicines). From Mexico to Peru, people have developed local economies based Prosopis juliflora and its products. Pods are stored year-round for fodder and may be made into flour or nutritious syrup. Honey is made and gums are collected. Products are either for family use or for sale in local markets. In Colombia and Venezuela Prosopis is sometimes referred to as ‘maíz criollo’ (‘local maize’), indicating its importance as a nutrient source for either man or animal (Pasiecznik 2002b 2001).\r\n
Trading in products such as wood, food and fodder provides the only source of income for some families in rural India. Prosopis juliflora is almost unsurpassable as a fuel in the dry rural areas of this country, and many small farmers, landless and artisans depend on it to cook all their meals. It is often the main source fuel, small roundwood and dry season fodder, and has been called the \"tree of the poor\" by some, indicating its importance to these people (Pasiecznik 2002a 2002b). Aborigines depend on mesquites to reduce dust in the dry regions of Australia. In the Northern Territory, isolated communities use mesquites to minimise erosion around gold and copper mining areas. The trees are also used in Australia, and elsewhere, to provide shade and fodder for cattle. Apparently mesquite charcoal also releases a fragrant scent when burnt (Agriculture & Resource Management Council of Australia & New Zealand, 2000).
Habitat Description
Grows in arid to semi-arid environments including deserts, open woodlands, grasslands, shrublands and floodplains. Mesquites tend to establish most successfully on clay and alluvial soils that have good moisture retention. Soil moisture is more important in determining mesquite distribution than soil type. P. pallida has established in areas which receive annual rainfall ranging from 250-1500mm (Agriculture & Resource Management Council of Australia & New Zealand, 2000).\r\n
Prosopis often colonises disturbed, eroded, over-grazed or drought-affected land, associated with unsustainable agronomic practices (such as following the introduction of cattle ranching in the Americas). Prosopis trees have many competitive ecological advantages and may form dense, impenetrable thickets. However the seedlings are sensitive, rarely establishing under mature trees or in tall grass. P. juliflora and P. pallida are not to be unable to persist in areas of southern or Mediterranean Africa that receive frost (Pasiecznik 1999 2001 2002a).
Prosopis often colonises disturbed, eroded, over-grazed or drought-affected land, associated with unsustainable agronomic practices (such as following the introduction of cattle ranching in the Americas). Prosopis trees have many competitive ecological advantages and may form dense, impenetrable thickets. However the seedlings are sensitive, rarely establishing under mature trees or in tall grass. P. juliflora and P. pallida are not to be unable to persist in areas of southern or Mediterranean Africa that receive frost (Pasiecznik 1999 2001 2002a).
Reproduction
Prosopis spp. produce small greenish-cream “lambs’ tails” flowers that grow near ends of branches in wattle-like spikes. Seedpods are 10 to 20cm long, with slight constrictions between the seeds. Each pod contains 5 to 20 hard seeds. Mesquite generally produces a single crop of seeds per season. Numbers recorded include 630,000 to 980,000 seeds/tree/year, although these numbers have not been recorded in all countries (Agriculture & Resource Management Council of Australia & New Zealand, 2000).
Pathway
Prosopis spp. have been introduced into countries for use in agroforestry (Zimmerman Pers. Comm. 2003).When livestock are moved by road transport and between paddocks on individual properties, this becomes the single most important mechanism for the long distance dispersal of mesquite. In Australia in particular any attempts to control and contain the weedHumans have transported the plant across the landscape and across the world for use as an ornamental tree (Agriculture & Resource Management Council of Australia & New Zealand, 2000).
Principal source: Agriculture & Resource Management Council of Australia & New Zealand, 2000. Australian & New Zealand Environment & Conservation Council and Forestry Ministers. Weeds of National Significance Mesquite (Prosopis species) Strategic Plan. National Weeds Strategy Executive Committee, Launceston.
Australian Weeds Committee, 2008. Weeds of National Significance. Mesquite
Mwangi, Esther & Brent Swallow, June 2005, Invasion of Prosopis juliflora and local livelihoods: Case study from the lake Baringo area of Kenya. ICRAF Working Paper – no. 3. Nairobi: World Agroforestry Centre
Compiler: IUCN/SSC Invasive Species Specialist Group (ISSG)
Updates with support from the Overseas Territories Environmental Programme (OTEP) project XOT603, a joint project with the Cayman Islands Government - Department of Environment
Review:
Publication date: 2010-04-27
Recommended citation: Global Invasive Species Database (2024) Species profile: Prosopis. Downloaded from http://iucngisd.org/gisd/species.php?sc=433 on 22-11-2024.
General Impacts
The four main species that have presented problems as weeds world-wide are P. glandulosa and P. velutina in more subtropical regions and P. juliflora and P. pallida in the truly tropical zone. Prosopis is now a declared weed over millions of square kilometres of arid and semiarid lands, where it drastically reduces the production of forage plants, threatening the livelihoods of ranchers (Pasiecznik 2001). \r\n
In its native range, Prosopis increases the density of vegetation. Environmental disturbances typically caused by humans, such as over-grazing and increased bush fire rates (due to poor land management), stimulate Prosopis growth and aggravating its effects. In its introduced range the species is much more aggressive. There are dense infestations in areas including but not limited to: Africa (the Sahel region, Sudan, Ethiopia, Kenya, Namibia, South Africa, Eritrea), India, Australia, St Helena (Ascension), and Brazil (Zimmerman Pers. Comm. 2003). \r\n
Prosopis species have received international attention because of their impact on open grassland and woodland ecosystems. They form impenetrable thickets, smother native vegetation and hinder some primary production sectors. Around 1985 the USA experienced production losses of some $200-500 million per year from mesquite infestations (Agriculture & Resource Management Council of Australia & New Zealand, 2000).
In its native range, Prosopis increases the density of vegetation. Environmental disturbances typically caused by humans, such as over-grazing and increased bush fire rates (due to poor land management), stimulate Prosopis growth and aggravating its effects. In its introduced range the species is much more aggressive. There are dense infestations in areas including but not limited to: Africa (the Sahel region, Sudan, Ethiopia, Kenya, Namibia, South Africa, Eritrea), India, Australia, St Helena (Ascension), and Brazil (Zimmerman Pers. Comm. 2003). \r\n
Prosopis species have received international attention because of their impact on open grassland and woodland ecosystems. They form impenetrable thickets, smother native vegetation and hinder some primary production sectors. Around 1985 the USA experienced production losses of some $200-500 million per year from mesquite infestations (Agriculture & Resource Management Council of Australia & New Zealand, 2000).
Management Info
Preventative measures: A Risk assessment of Prosopis spp. for Australia was prepared by Pacific Island Ecosystems at Risk (PIER) using the Australian risk assessment system (Pheloung, 1995). The result is a score of 20 and a recommendation of: reject the plant for import (Australia) or species likely to be a pest (Pacific).
Eradication of Prosopis has proven to be extremely difficult or impossible. Better management of Prosopis, different land use strategies and the exploitation of Prosopis as a resource may reduce its invasiveness in some regions as well as improving local economies (Pasiecznik 2002). Examples of better management include: 1) Stand conversion and improvement- Weedy stands thinned to 100-400 trees per hectare, in stages. Broad strips cleared and cut stumps are removed manually/mechanically, treated by stripping the bark or treated with used motor oil/triclopyr and diesel mixture. Animals may re-enter immediately as these chemicals have little mammalian toxicity. Selected trees in the remaining rows are pruned to single stems at final spacings of 5 by 5 metres to 10 by 10 metres. The cost of the operation should be at least covered by the charcoal, wood chips and small timber obtained from operation; 2) Pruning appears to be the single most important technique in improving tree and understorey yields. Weedy shrubs are turned into valuable, productive trees by removal of side branches. Regularly pruned trees are found to have smaller root systems, use soil water more efficiently and compete less with neighbouring crops and grasses. Stands can be improved by introducing thornless or high yielding varieties or by grafting or interplanting; 3) Prevention- Prosopis seedlings rarely establishing under mature trees or in tall grass. Re-invasion can be minimised by maintaining a high-pruned tree canopy and improved understorey management. A reduction in stocking rates, for example, can encourage good grass cover, preventing Prosopis seedling establishment. Destroying seed, by the collection and use of pods for stall feeding or processing, reduces re-invasion. A change of livestock from cattle to sheep or pigs (which kill most to all of seeds ingested) also limits Prosopis spread
The Best Practice Manual Mesquite Control and management options for mesquite (Prosopis spp.) in Australia aims to provide the most current information on mesquite in Australia. The control and management options presented in this manual are the combined results of years of trials carried out by many dedicated researchers, landholders, herbicide companies, government officers, landcare groups and others. As mesquite species respond differently to control methods, the most effective method or combination of methods will vary depending on the size, density and species of mesquite present. The manual includes a 'mesquite control tool box'. Included also are a number of case studies to demonstrate best practice.
