Millet

Panicum miliaceum

1. Identification and origin

Proso millet (Panicum miliaceum L.) is an annual grass of the Poaceae family, considered one of the oldest domesticated cereal crops. Its origin lies in Central Asia, particularly in the regions of China and Mongolia, from where it spread to Europe and the Middle East. It is traditionally cultivated in semi-arid areas due to its high tolerance to drought.

2. Economic importance

Proso millet is used mainly for animal feed (poultry, pigs and ruminants), although it also has applications in human food in some regions of Asia and Eastern Europe. It stands out for its hardiness, short cycle and capacity for production under limiting soil and climate conditions. In rainfed agricultural systems, it constitutes a viable alternative for the diversification of rotations and grain production in dry environments.

3. Botanical characterisation

An annual plant of medium size, 0.5–1.5 m in height, with erect stems and linear leaves. The inflorescence is an open or more compact panicle, depending on the cultivar. The grains are small, spherical or oval, varying from white to golden-yellow. The root system is relatively deep, giving good tolerance to water stress. The growing cycle is short, varying between 60 and 90 days.

4. Soil and climate requirements

Proso millet adapts well to hot, dry climates, being one of the most drought-tolerant cereal crops. It prefers temperatures between 20–30 °C and well-drained soils, with a loamy to sandy-loam texture. It tolerates poor soils, but responds positively to balanced fertilisation. The ideal pH lies between 5.5 and 7.5. It is sensitive to waterlogging and to weed competition in the initial stages.

5. Main pests

• Aphids (Aphididae): sap sucking and transmission of viruses
• Defoliating caterpillars (Noctuidae): reduction of leaf area
• Grasshoppers (Acrididae): intense defoliation in outbreak conditions
• Sucking bugs (Pentatomidae): damage to panicles and grains
• Thrips (Thysanoptera): leaf lesions and reduced photosynthesis

6. Main diseases

• Downy mildew (Sclerospora graminicola): chlorosis and leaf deformations
• Rust (Puccinia substriata): pustules and reduction of productivity
• Smut (Sporisorium destruens): replacement of the grains by dark masses
• Helminthosporiosis (Bipolaris spp.): leaf spots and necrosis
• Root rots associated with waterlogged soils

7. General crop management

Management of proso millet includes choosing cultivars adapted to the intended cycle and to local conditions. Sowing should be carried out in well-prepared soil, ensuring good emergence and reducing weed competition. Fertilisation should be balanced, with attention to nitrogen and phosphorus. Weed control is critical in the first weeks. Harvesting occurs when the grains reach physiological maturity and have low moisture, avoiding losses through natural shattering.

Bibliographic references

• EPPO Global Database – Panicum spp.
• CABI – Crop Protection Compendium – Panicum miliaceum
• Baltensperger, D. D. (2002). Proso Millet. In: Warm–Season Cereal Grains. ASA–CSSA.
• Habiyaremye, C., et al. (2017). Proso millet agronomy and potential. Agronomy Journal.
• Seetharam, A., Riley, K. W., Harinarayana, G. (2022). Small Millets: Advances in Breeding and Management. Springer.
• FAO (2021). Millets and Small Grains Production Manual.
• Taylor, J. R. N., Duodu, K. G. (2019). Sorghum and Millets: Chemistry, Technology and Nutritional Attributes. AACC International.