Caper spurge

Caper spurge (Latin: Euphorbia lathyris L.) is an annual herbaceous plant belonging to the Euphorbiaceae family. Within modern agronomy, this crop is recognized for its potential as an industrial oilseed source, as its seeds contain a high percentage of fatty oils that can be utilized for biofuel production and various chemical industry applications.

The origin of this species traces back to the Mediterranean region, but it has naturalized in many temperate and subtropical climates globally. It thrives in well-lit environments and is known for its ability to grow on various soil types, provided there is adequate drainage to prevent root rot during early growth stages.

Botanically, the plant is characterized by a sturdy, upright stem that can reach heights of up to two meters. Its leaves are oppositely arranged, linear-lanceolate, and often have a bluish-green, waxy appearance. The flowering period is mid-summer, resulting in dehiscent capsules that must be harvested carefully before they shatter to ensure high seed yield.

Agricultural requirements include well-drained, fertile soil and protection from extreme wind. The crop is relatively drought-tolerant once established, but optimal growth requires consistent moisture during the vegetative phase. Weed control during the early stages is critical, as the young plants are not highly competitive with fast-growing invasive weeds.

Economically, Caper spurge is valued for its non-food oil properties. Furthermore, it is widely acknowledged in agriculture as a companion plant used to deter moles and voles from cultivated areas due to its potent, toxic sap. Because the plant's latex is an irritant to human skin, specialized handling procedures are required during large-scale harvesting operations.

• High seed oil content suitable for biofuel.
• Natural mole and rodent repellent properties.
• Adaptable to diverse climate conditions.
• Relatively low pest pressure due to toxic compounds.
• Potential for industrial bio-based lubricants.