Pearl millet

Pearl millet (Cenchrus americanus, commonly known as the synonym Pennisetum glaucum) is the most widely grown type of millet. It has been grown in Africa and the Indian subcontinent since prehistoric times. The center of diversity and suggested area of domestication for the crop is in the Sahel zone of West Africa.

Description

thumb|Seed heads|alt=Three fruiting heads

Pearl millet has ovoid grains of length, the largest kernels of all varieties of millet (not including sorghum). These can be nearly white, pale yellow, brown, grey, slate blue or purple. The 1,000-seed weight can be anything from 2.5 to 14 g with a mean of 8 g.

The height of the plant ranges from .

Pearl millet varieties from the world collection probably have more variation in physical characteristics than any other millet. Kernel shape has different classifications: obovate, hexagonal, lanceolate, globular and elliptical. In Africa, pearl millet is classified as either globular or lanceolate and hexagonal. Most of the millets are very similar to each other in basic structures, although there are some very specific differences.

Cultivation

Recent archaeobotanical research has confirmed the presence of domesticated pearl millet on the Sahel zone of northern Mali between 2500 and 2000 BCE. The Sahel zone is the species' center of diversity and suggested area of domestication.

Pearl millet is well adapted to growing areas characterized by drought, low soil fertility, low moisture, and high temperature. It performs well in soils with high salinity or low pH. Because of its tolerance to difficult growing conditions, it can be grown in areas where other cereal crops, such as maize or wheat, would not survive. Pearl millet is a summer annual crop well-suited for double cropping and rotations. The grain and forage are valuable as food and feed resources in Africa, Russia, India and China.

Today, pearl millet is grown on over of land worldwide. It accounts for about 50% of the total world production of millets.

World production of millets has been stable during the 1980s. According to FAO, of millet were planted in 1987 with an average production of only .frameless|right|alt=Grains

Pests

thumb|Shoot fly infested plant

Insect pests include Anoecia corni, An. cornicola, Anoecia fulviabdominalis, An. vagans, Aphis gossypii, Forda hirsuta, F. orientalis, Geoica utricularia, Hysteroneura setariae, Melanaphis sacchari, Protaphis middletonii, Rhopalosiphum maidis, R. rufiabdominale, Schizaphis graminum, Sipha elegans, Sipha maydis, Sitobion avenae, Sit. leelamaniae, Sit. pauliani, Tetraneura africana, Tetraneura basui, Tetraneura fusiformis, and T. yezoensis.

Africa

The larvae of several insect species, primarily belonging to the orders Coleoptera, Lepidoptera, Diptera, and Hemiptera, as well as Orthoptera adults, are persistent pearl millet pests in the Sahel. The following pest species are reported for northern Mali.

Coniesta ignefusalis (pearl millet stem-borer; Lepidoptera, Crambidae) attacks pearl millet, and also sorghum and maize, especially in the Sahel. It is the main pearl millet pest in Senegal.
Heliocheilus albipunctella (pearl millet head-miner; Lepidoptera, Noctuidae) attacks pearl millet. The larvae bore in a spiral path, destroying florets or grain.
Geromyia penniseti (millet grain midge): The larvae eat the developing grain and form white pupal cases attached to the tips of spikelets. Reported losses in Senegal are as high as 90 percent.
Pachnoda interrupta (millet beetle)
Psalydolytta fusca and Ps. vestita (pearl millet blister beetle; Coleoptera, Meloidae) attack pearl millet. They are major millet pests in Mali.
Rhinyptia infuscata (Scarabaeidae, Rutelinae, Anomalini) is a nocturnal beetle, recorded as a locally important pest on millet flowers in Niger. Farmers in Niger often fight the species using fires set at night. It is also reported as sorghum pest in Senegal, and as a pest on maize, where the larvae attack the roots.
Sesamia calamistis (pink stem borer), especially in lowland forests. This species and the sugarcane borer (Eldana saccharina) are the primary pests of the pearl millet in Ivory Coast.
gall midges (Diptera, Cecidomyiidae): millet grain midge (Geromyia penniseti), sorghum midge (Contarinia sorghicola), and African rice gall midge (Orseolia oryzivora).
Dysdercus volkeri (cotton-stainer; Hemiptera, Pyrrhocoridae) attacks flowers.

Grasshoppers that frequently attack millets in the Dogon country of Mali are Oedaleus senegalensis, Kraussaria angulifera, Cataloipus cymbiferus, and Diabolocatantops axillaris.

In northern Nigeria, heavy infestations of Hycleus species, including Hycleus terminatus (syn. Mylabris afzelli), Hycleus fimbriatus (syn. Mylabris fimbriatus), Hycleus hermanniae (syn. Coryna hermanniae), and Hycleus chevrolati (syn. Coryna chevrolati), have affected early plantings of pearl millet crops.

Other regions

In South India, pests include the shoot fly Atherigona approximata.

In North America, regular pests include the chinch bug Blissus leucopterus.

Culinary use

thumb|right|[[Roti, Sindh]]

thumb|[[Burukutu|Brukutu Drink a locally made beer using Guinea corn in Nigeria]]

Pearl millet is commonly used to make bhakri flatbread. It is also boiled to make a Tamil porridge called kamban choru or kamban koozh.

In Rajasthani cuisine is a traditional dish made with pearl millet flour and yogurt.

Flatbreads made of pearl millet flour are served with various types of kadhi and bhaaji in meals.

In Namibia, pearl millet flour is used to make oshifima, a staple food in the northern part of Namibia.

In Africa especially Nigeria and some areas, they use millet for making traditional foods like Gruel/porridge and even local beer. The local alcoholic (Burukutu) beverage is often produced in Tropical African countries such as Nigeria, Togo, Kenya, Ethiopia, and Burundi as one of the major traditional and local alcoholic drinks.

Composition

The composition of variety Changara of pearl millet can be affected by both environment and genetics. Pearl millet usually has higher protein and fat contents than sorghum or other millets because the kernel is a naked caryopsis.

{| class="wikitable"

|+Proximate analysis of pearl millet

!Millet type

!Protein

!Fat

!Ash

!Total DF

|Pearl millet

|12.8

|6.0

|1.2

|7.1

Values are expressed on a dry matter basis.

Around the world

India

India is the largest producer of pearl millet. India began growing pearl millet between 1500 and 1100 BCE. It is currently unknown how it made its way to India,

Mahangu is usually made into a porridge called "oshifima" (or "oshithima"), or fermented to make a drink called "ontaku" or "oshikundu".

Traditionally, the mahangu is pounded with heavy pieces of wood in a 'pounding area'. The floor of the pounding area is covered with a concrete-like coating made from the material of termite mounds. As a result, some sand and grit gets into the pounded mahangu, so products like oshifima are usually swallowed without chewing. After pounding, winnowing may be used to remove the chaff.

Some industrial grain processing facilities now exist, such as those operated by Namib Mills. Efforts are also being made to develop smaller scale processing using food extrusion and other methods. In a food extruder, the mahangu is milled into a paste before being forced through metal die. Products made this way include breakfast cereals, including puffed grains and porridge, pasta shapes, and "rice". Pearl millet is also a vital feedstock for cattle, goats and chickens which can also be explored as an enterprise.

Research and development

Recently more productive varieties of pearl millet have been introduced, enabling farmers to increase production considerably.

To combat the problem of micronutrient malnutrition in Africa and Asia, a study of serving iron-biofortified pearl millets which is bred conventionally without genetic modification to a control group is proved to have higher level of iron absorbance by the group.

Around 1000 pearl millet genotypes (including 31 wild genotypes) have been sequenced, identifying the genetic diversity of this staple crop and aiding breeding to select for particular characteristics. A reference genotype of pearl millet () has been fully sequenced, which holds around 38,579 genes. Some of these genes are for wax biosynthesis, which is known to be involved in tolerance to abiotic stresses in pearl millet. The International Crops Research Institute for the Semi-Arid Tropics is evaluating crop wild relatives and will introgress abiotic tolerant traits into cultivated genotypes and make them available for pearl millet improvement.

A 2015 study provided a genetic map.

In culture

2023 was the , declared by the United Nations General Assembly in 2021.

Gallery

File:Checking pearl millet crop.jpg|alt=Agronomist, Zimbabwe checks the crop|Agronomist, Zimbabwe

File:Mahangu poundin.jpg|Mahangu pounding in Namibia

File:Mahangu pounding.jpg|Mahangu pounding in Namibia

File:Making dough from flour (10692692875).jpg|Flour mill, Tanzania

</gallery>