Rubber rabbitbrush

Rubber rabbitbrush (Ericameria nauseosa) is a perennial shrub belonging to the Asteraceae family. This species has gained significant interest in agricultural research due to its potential as a renewable source of natural rubber and resins, making it a viable crop for semi-arid and marginal lands.

Native to the western regions of North America, this plant is well-adapted to diverse environmental conditions ranging from dry shrublands to high-altitude steppes. Its historical range extends across vast territories, where it thrives despite limited annual precipitation, positioning it as a resilient candidate for dryland farming.

Botanically, it is a branched shrub characterized by narrow leaves covered in white or grey tomentose hairs, which reduce transpiration. It blooms in late summer to autumn with distinct clusters of yellow disc flowers. The root system is extensive and deep, enabling the plant to maintain growth cycles even during prolonged dry spells, a trait essential for survival in its arid habitat.

Climatic requirements are focused on high light exposure and well-drained soil types. The plant is highly tolerant of saline and alkaline soils, which are typically unsuitable for most cereal or vegetable crops. Cultivation practices emphasize minimal irrigation and moderate soil preparation, as excessive nutrients or water can actually reduce the yield of desirable industrial resins.

• Significant rubber and resin accumulation.
• High drought and frost tolerance.
• Adaptability to harsh soil conditions.
• Low requirement for chemical inputs.

The primary economic use is the industrial extraction of natural rubber, which is chemically similar to that derived from other sources, as well as the production of specialty chemicals. Regarding pest management, the crop is relatively robust; however, it can occasionally be affected by various aphids or root-rot fungi if the soil is poorly drained. Integrated pest management strategies focus on maintaining optimal plant spacing to ensure airflow and mitigate these risks.