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18 February 2019 | Story Leonie Bolleurs | Photo HO de Waal
Ground spiny Cactus pear
Shredded, sun-dried, and coarsely ground spiny cactus pear (Opuntia ficus-indica and O. engelmannii), ready to be included in balanced diets for ruminant livestock (cattle, sheep, goats) and wild antelopes.

Prof HO de Waal, researcher in the Department of Animal, Wildlife and Grassland Sciences at the University of the Free State (UFS), has developed a standard procedure for the processing of spiny cactus pear (Opuntia spp.) into livestock fodder. This will ultimately assist in the management of massive infestations of spiny cactus pear and help to convert underutilised farmland back to natural grazing land.

In addition to applying biological control agents, mechanical control is used to harvest alien spiny cactus pear, and the large volume of material is processed as livestock feed.

 

Introduced to South Africa

 

Three hundred years ago, seafarers visiting the Cape of Good Hope introduced the well-known invading alien spiny cactus pear to South Africa. These were later transported inland and by the 1950s about one million ha of South Africa had been invaded by the alien cacti.

Some regions in the Eastern Cape have been taken over by dense, impenetrable thickets of these cacti. Invasive alien plants (IAPs) such as cacti pose a direct threat to, among others, South Africa’s water security and productive use of land.

A range of methods is used to control IAPs, including mechanical, chemical, biological, and integrated control methods.

A control programme must include the three phases of initial control to drastically reduce the existing population; follow-up control of seedlings, root suckers, and coppice growth; and maintenance control on an annual basis to sustain low alien plant numbers.

 

Processing spiny cactus pears

 

According to Prof De Waal, the harvesting and processing of the spiny cactus pear is fairly simple. Although it requires a good measure of physical strength, perseverance, and the necessary protective clothing, the cacti can be processed by harvesting the plants; shredding the cladodes through a cladode cutter; then drying them in the sun, and lastly grinding it in a hammer mill. “The long spines are degraded mechanically by grinding the sun-dried cladode strips in a hammer mill before including it in balanced livestock diets,” said Prof De Waal.

Infestations will be opened, reclaimed, rehabilitated and the natural pastures (veld) allowed to revert back to grazing for livestock.

The National Resource Management Programme (NRM)P) will be approached for official support in clearing and rehabilitating massive areas of infestation by alien spiny cactus pear in the Eastern Cape. Such financial support will be an investment in reducing the infestation by invaders and the rehabilitation and sustainable use of natural resources in South Africa.

News Archive

UFS Camerata ends concert season on a high note
2017-11-02

Description: UFS Camerata  Tags: UFS Camerata  

The final concert at Endler Hall at Stellenbosch University, presented by the
Endler Concert Series, was attended by the UFS Rector and Vice-Chancellor,
Prof Francis Petersen and Mrs Cheslyn Petersen. Here, on stage, is Prof Petersen
with the Camerata.
Photo: Supplied

The OSM Camerata (OSMC) of the Odeion School of Music at the University of the Free State ended the 2017 concert season on a high note with two gala concerts presented in the Western Cape as part of the ensemble’s fifth birthday celebrations. The first concert took place at the well-known Hugo Lambrechts Auditorium in Parow on 20 October 2017. A Stellenbosch University audience also had the privilege of listening to the Camerata at Endler Hall the following day.

A substantial part of the concert programme recited during the concerts was dedicated to prolific South African composer, Prof Hendrik Hofmeyr, in honour of his 60th birthday on 20 November 2017. The ensemble recited Super Flumina Babylonis, Notturno Elegiaco & Spokewals/Phantom Waltz - all works commissioned from Prof Hofmeyr for the OSMC.

The Odeion School of Music awarded the Order of the OSM to Prof Hofmeyr during the concert in gratitude for his tremendous contribution as a South African composer.

The final concert at Endler Hall, presented by the Endler Concert Series, was attended by the UFS Rector and Vice-Chancellor, Prof Francis Petersen, and Mrs Cheslyn Petersen.

According to Marius Coetzee from the Odeion School of Music, the OSMC was strategically founded in 2012 as the OSM’s flagship chamber orchestra with its main objective being to create a catalyst for excellence. From a pedagogical perspective, the OSMC serves as an incubator to nurture fully rounded musicians who are thoroughly prepared for the demands of their trade as orchestral musicians, soloists and conductors. 

Responding to the demand for excellence, on 1 September 2017 it was announced that the OSMC received first prize for the 2017 Ictus International Music Competition (US) as the winner of the category for Conservatory and University Orchestras.

Louis van der Watt, head of strings at the University of Stellenbosch Conservatory and vice conductor of the university’s symphony orchestra, remarked that the OSMC presented an excellent concert. Audience members concurred, saying the OSM Camerata was setting new standards for orchestral playing in South Africa.

Review from Louis van der Watt, University of Stellenbosch (available in Afrikaans)

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