Parsnip

Pastinaca sativa

1. Identification and origin

The parsnip, also known as pastinaca (Pastinaca sativa L.), is a biennial herbaceous plant of the Apiaceae family, native to Europe and Western Asia. It is cultivated as a root vegetable, similar to the carrot, but with a sweeter flavour and characteristic aroma. It was widely used in European food before the spread of the potato.

2. Economic importance

The parsnip is consumed fresh, cooked or processed, being valued in specialised markets and traditional gastronomy. It is of growing interest in organic horticulture and in market niches due to its nutritional profile and distinctive flavour. It is also used as a rotation crop in horticultural systems.

3. Botanical characterisation

Biennial plant cultivated as an annual. The root is tuberous, elongated, of a white to cream colour, with a high content of sugars. The leaves are compound, pinnate, with broad and serrate segments. The inflorescence is a compound umbel, typical of the Apiaceae, with yellow flowers. The root system is taprooted and sensitive to soil compaction.

4. Soil and climate requirements

It prefers cool temperate climates, with optimum temperatures between 10–20 °C. It develops best on deep, loose, well-drained, sandy or sandy-loam soils, with a pH between 6.0 and 7.5. It is sensitive to compaction and to stoniness, which cause root deformations. It tolerates light frosts and benefits from regular soil moisture.

5. Main pests

• Carrot fly (Psila rosae): galleries in the root and commercial loss.
• Aphids (Aphididae): sap-sucking and transmission of viral diseases.
• Root-knot nematodes (Meloidogyne spp.): root deformations and reduced productivity.
• Caterpillars (Lepidoptera): leaf damage.
• Mites (Tetranychidae): chloroses and loss of vigour.

6. Main diseases

• Alternaria leaf blight (Alternaria spp.): leaf spots and defoliation.
• Powdery mildew (Erysiphe spp.): white mycelium on leaves.
• Leaf blight (Cercospora spp.): leaf lesions and reduction of growth.
• Bacterial rots (Pectobacterium, Erwinia): post-harvest deterioration.
• Fungal rots (Rhizoctonia, Sclerotinia): root damage and losses in the field.

7. General crop management

Management includes crop rotation, use of certified seed, adequate soil preparation, adjusted sowing density and balanced fertilisation. Monitoring of carrot fly and Alternaria leaf blight is essential. Harvest should be carried out when the roots reach the commercial calibre, and they may remain in the soil during winter to improve flavour. Storage should be done in cool and humid conditions to prolong preservation.

Bibliographic references

• EPPO Global Database – Pastinaca sativa.
• CABI Crop Compendium – Pastinaca sativa.
• Rubatzky, V. E., & Yamaguchi, M. (1997). World Vegetables. Chapman & Hall.
• Strandberg, J. O. (2008). Compendium of Umbelliferous Crop Diseases. APS Press.