Latest News Archive

Please select Category, Year, and then Month to display items
Categories
UFS News Media Release Research
Years
2019 2020 2021
Months
February March May June July August September October November December
Previous Archive
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

South Africa praised for dealing with its history
2012-07-12

“I listened to an incredible conversation on how South Africans can talk about the past. We failed to do that in the US. We cannot move on because we failed to name the ghosts in our past. I am honouring what South Africa is doing.”

These are the words of a staff delegate from a university in the USA in a case study at the Global Leadership Summit led by Prof. André Keet, Director of the International Institute for Studies in Race, Reconciliation and Social Justice at the University of the Free State (UFS).

Students and academics from universities in the USA, Belgium, the Netherlands and Japan are attending a Global Leadership Summit with the theme “Transcending Boundaries in Global Change Leadership” at the UFS.

In the case study, symbols on the Bloemfontein Campus such as the MT Steyn Statue, Justitia symbol of justice at the building of the Faculty of Law, the artwork Van hier tot daar, and the Women’s Memorial were presented to the audience and the question was asked if they had to be removed or if they had to remain.

Students overwhelmingly felt that symbols of the past had to remain. Here are some of the comments:

  • “Without our past we would not be here today. Without the past, we would not know why we are here or where we are going.”
  • “It is important for students that it remains on campus, as a reminder that history must not repeat itself.”
  • “There is room for new symbols. We must look back but must also look at the future.”
  • “We must resolve the problems of the past and move on.”
  • “We must remember that we cannot go back there again. We must not take away part of other people’s history.”
  • “Symbols must be contextualised.”
  •  “Don’t look in the rear mirror, but through the windscreen where you are going. The windscreen is far bigger.”

One student said the statute of MT Steyn filled him with anger.

Prof. Keet said the act of running away from the ghosts of the past was a way to keep those ghosts alive. The past cannot be dealt with, only visited. The ghosts connect people with the past and allow the past to be present in the now.
 

We use cookies to make interactions with our websites and services easy and meaningful. To better understand how they are used, read more about the UFS cookie policy. By continuing to use this site you are giving us your consent to do this.

Accept