EWT Conservation Campus Takes Bold Steps for Pompom Weed Eradication
Dr Kerushka Pillay, the EWT’s CONSERVATION PLANNING AND SCIENCE UNIT
In the heart of Glen Austin, Midrand, the EWT Conservation Campus is leading the charge against the invasive Pompom weed (Campuloclinium macrocephalum), aligning with our commitment to biodiversity preservation and ecosystem health.
The Pompom weed, native to Central and South America, has become a significant concern in South Africa. The plant has been classified as invasive under stringent legislation such as the Conservation of Agricultural Resources Act (CARA), 2002, and the National Environmental Management Act (NEMBA).
The invasive Pompom poses a severe threat to our local ecosystem, particularly in grassland regions of Gauteng, KwaZulu-Natal, Limpopo, Mpumalanga, and the Eastern Cape Provinces. Leading by example in efforts to address this, the EWT Conservation Campus has implemented a comprehensive and innovative long-term eradication plan, focusing on the strategic removal of Pompom weed from our property.
As part of our commitment to sustainable practices, we have introduced a biocontrol strategy utilising the Pompom thrips (Liothrips tractabalis), tiny insects imported from Argentina. Carefully studied and proven to feed exclusively on Pompom weed, these thrips were released on our grasslands in December 2023. Thrips play a vital role by selectively feeding on Pompom, causing damage to its vital structures, and impeding its growth. This targeted approach minimises the impact on non-target species, promoting a balanced ecosystem.
In collaboration with the Agricultural Research Council (ARC), our team will conduct regular assessments to measure the thrips’ impact on Pompom populations and overall ecosystem health. This initiative not only showcases our dedication to biodiversity preservation but also highlights the strength of interdisciplinary collaboration.
In the past, the EWT team, under the leadership of Obeid Katumba (Wildlife in Trade Programme), commenced a physical, manual removal process to kickstart Pompom eradication efforts. This involved cutting seed-containing plant sections, placing them in bags, and uprooting remaining plants. Thorough disposal through incineration was done, emphasising the urgency for effective control, especially in highly infested areas.
Our ongoing efforts, including the introduction of eco-friendly biological control, signify our commitment to long-term environmental health and sustainability. We anticipate updates on the project’s success and encourage stakeholders to reach out with any questions or queries regarding the Pompom eradication plan. For further information, please contact Dr Kerushka Pillay at KerushkaP@ewt.org.za or on 0727193741.
