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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

Staff, students, learners and the public opened their hearts during R5 coin-laying ceremony
2012-07-19

Photo: Sonia Small
18 July 2012

Amidst a festive atmosphere on the Red Square in front of the Main Building on the Bloemfontein Campus of the University of the Free State (UFS), students, staff, learners and members of the public came together to make their contribution to stop hunger.

In celebration of former president Nelson Mandela’s birthday, the university collected money and food in the form of a coin-laying ceremony, the packing of food parcels, and a message delivered by Emeritus Archbishop Desmond Tutu in aid of the university’s No Student Hungry (NSH) campaign and Bloemfontein Child Welfare.

Representatives from schools in Bloemfontein donated their R5 coins, together with university staff, students, members of the public, and employees of Pick n Pay Hyper. Money collected at the coin-laying ceremony will be shared between NSH and Bloemfontein Child Welfare.

According to Ms Grace Jansen and Ms Carin Buys, patrons of NSH, the more than R42 000 that was collected will be donated to Bloemfontein Child Welfare in an effort by NSH to give back to the community. “We are impressed by the number of people who showed up and by the fact that people opened their hearts and pockets to give,” said Ms Buys.

Thirty employees of Pick n Pay Hyper in Bloemfontein were also present and packed 1 833 food parcels (equivalent to 11 000 meals). This forms part of a Pick n Pay initiative in cooperation with Stop Hunger Now that is being held countrywide today.

In total, 88 000 meals will be distributed in six cities in South Africa today. The 11 000 meals in the Free State have been donated to the university and according to Ms Jansen a social worker at the UFS will distribute it to other needy students. These are students who do not receive bursaries from NSH at the moment. Every food parcel contains rice, dried vegetables, soya, and vitamin and mineral enriched powder.

The university was honoured to have Emeritus Archbishop Desmond Tutu as the speaker at the event. He attended a dialogue in the Series of Dialogue between Science and Society today at the university where he took part in a conversation with Profs. Mark Solms and Pumla Gobodo-Madikizela as part of the Global Leadership Summit.

He made a special appearance at the university’s Nelson Mandela Day festivities. His message was simple but inspiring: “Everyone has, just like Madiba, the capacity to change lives. I hope there are people present who can say that they want to improve someone else’s life. You have the chance to make South Africa a country where no one goes to bed hungry. Help us to make South Africa a country where we have compassion for each other and care for each other”.

The UFS would like to thank the following schools for their contributions: 

Grey Kollege Primêre Skool
Grey Kollege
St Michael's School for Girls
Hoërskool Jim Fouché
Hoërskool Fichardtpark
Hoërskool Sentraal
Navalsig High School
HTS Louis Botha
Eunice High School 


 

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