Common Bean

Phaseolus vulgaris

1. Identification and origin

The common bean (Phaseolus vulgaris L.), belonging to the Fabaceae family, is native to Mesoamerica and the Andes, where it was domesticated independently. The species spread widely after the pre-Columbian agricultural expansion and, later, with its introduction into Europe and Africa.

2. Economic importance

It is one of the most important food legumes in the world, consumed both as a dry grain and as a pod (green bean). It represents an essential source of plant protein, fibre and micronutrients. Countries such as Brazil, Mexico, India, China, the USA and several African countries stand out in production and consumption.

3. Botanical characterisation

An annual, herbaceous plant with a variable growth habit (determinate, indeterminate or climbing). The leaves are compound, trifoliate. The flowers, typical of the Fabaceae, are white, pink or purple in colour. The pods are elongated, containing seeds of great morphological and chromatic variability. The root system is relatively superficial, with nitrogen-fixing nodules.

4. Soil and climate requirements

It prefers warm and moderately dry climates, being sensitive to frost and very high temperatures during flowering. It develops best in well-drained soils of medium texture, fertile and with a slightly acidic to neutral pH. It is sensitive to waterlogging and salinity. It needs regular moisture, especially during flowering and pod filling.

5. Main pests

• Bean weevil (Acanthoscelides obtectus): perforations and destruction of stored seeds.
• Whitefly (Bemisia tabaci): sap sucking and transmission of viruses.
• Aphids (Aphis fabae, Myzus persicae): leaf deformations and transmission of viruses.
• Mites (Tetranychus urticae): chloroses and loss of vigour.
• Root-knot nematodes (Meloidogyne spp.): root deformations and reduction of growth.

6. Main diseases

• Anthracnose (Colletotrichum lindemuthianum): dark lesions on leaves, stems and pods.
• Rust (Uromyces appendiculatus): brown pustules and defoliation.
• Downy mildew (Phytophthora nicotianae var. phaseoli): root rots and death of young plants.
• Root rot (Rhizoctonia solani): damping-off and necroses at the collar.
• Viruses (BCMV, BCMNV): mosaics, deformations and reduction of vigour.

7. General crop management

This includes the choice of adapted and disease-resistant varieties, sowing in well-drained soils, crop rotation with legumes and grasses, weed control, regular monitoring of pests and diseases and balanced irrigation, avoiding waterlogging. Harvesting should be adjusted to the destination (dry grain or fresh pod), ensuring quality and conservation.

Bibliographic references

• EPPO Global Database. Phaseolus vulgaris – pests and diseases.
• CABI Invasive Species Compendium. Phaseolus vulgaris – datasheets.
• Schwartz, H. F., et al. (2005). Bean Production Problems in the Tropics. CIAT.
• Singh, S. P. (2001). Broadening the genetic base of common bean. In: S. P. Singh (Ed.), Common Bean Improvement in the Twenty‑First Century (pp. 1–20). Springer.
• Broughton, W. J., et al. (2003). Beans (Phaseolus spp.) – model food legumes. Plant and Soil.