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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 implements paperless meeting system
2004-08-20

 

The Management Committee of the University of the Free State ’s (UFS) Executive Management recently entered the electronic environment of more effective and centralised meeting and decision-making administration by implementing ‘n computerised meeting system.

With this the UFS became the first higher education institution in the world to use the PARNASSUS-meeting management system. PARNASSUS , which refers to a mountain in the Greek mythology, is a licensed system from CIPAL in Belguim – a developer of software for a variety of applications.

“In stead of coming to a weekly management meeting with a file of documentation, each member now walks in with his/her laptop and the whole meeting procedure takes place electronically,” says Prof Sakkie Steyn, Registrar: General at the UFS.

At the same time the secretary registers the minutes point by point on the PARNASSUS programme. At the end of the meeting, after certain technical finishes are done, the minutes are distributed to members of the meeting and their secretaries/office managers. The draft minutes is also distributed to those who must implement decisions and prepare implementation steps. These staff members are given security clearance beforehand.

“The system is unique due to the fact that a translation engine has been built into the agenda and minute system. Agenda items can be submitted in Afrikaans and then automatically be translated in English by means of the interactive translation engine, or vice versa. The same principle applies to the minutes,” says Prof Steyn.

According to Prof Steyn the translation engine was develop with the expert assistance of the UFS’s Unit for Language Facilitation and Empowerment (ULFE). Word strings from previous minutes are now being added to the corpus of the translation engine.

“The system enables the secretary to continuously monitor which points are submitted for the agenda and if these points comply with the set standards namely clear recommendations, background and proposed implementation steps. The agenda is closed at a certain moment and no new points can then be added. The secretary does certain technical finished by means of a final classification of point and annexures. The draft agenda is then sent to the chairperson for approval, after which the agenda is electronically sent to members of the meeting and their secretaries/office managers for preparation,” says Prof Steyn.

“After the minutes have been approved at the next meeting, it is saved on the PARNASSUS decisions data base. The tracing of decisions made during previous meetings can be done by any person with the necessary security clearance. This is different from the past where stacks of documents had to be searched to find a decision,” says Prof Steyn.

According to Prof Steyn the secretariat and meeting administration services at the UFS has now entered a fully virtual and electronic environment. This will enhance effective decision making tremendously. “The PARNASSUS system saves us costs and time and the decentralisation of submissions to meetings lessens the work at centralised points,” says Prof Steyn.

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