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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

It’s Rag Time!
2014-01-14

 

Zakes Bantwini, Mango Groove and Robbie Wessels 
Photos: Supplied

Kovsie Rag Community Service will start 2014 off with the well-known Rag festivities, with enthusiastic students already starting with float building in January. The theme for Rag CS 2014 is ‘Movies.’

As from 20 January, a cheerful atmosphere will be present at the Kovsie Rag farm, with senior and junior students working hard, while social cohesion is developing between them. Great entertainment will be part of these festivities, with the likes of DJ Euphonik and Adam performing on 31 January.
In the midst of all these activities, the annual ‘Chicken Run’ evening collections will take place on 21, 23 and 28 January, as well as the Ritsim sales in Bloemfontein and surrounding areas on 24-25 January.

The hard work will reach its peak with the judging of the floats on the morning of 1 February, after which the floats will depart at 09:00 for the first procession of the day. This route will end at Twin City Mall at 11:00, where 10 000 meals will be distributed to communities in Heidedal and Mangaung. Learners from Heidedal schools will entertain the public with their talents.

Our very popular family festival will already start at 16:00 with the opening of the gates at Chevrolet Park Cricket Stadium. Young and old will be entertained by well-known and vibrant artists, such as Robbie Wessels, Mango Groove, Zakes Bantwini, as well as a spectacular firework show. Come early to ensure a great spot on the grass.

The float winners will be announced at 17:00, whereafter the main procession of the day will depart from the Tempe robot in Nelson Mandela Drive at 18:00. The public can look forward to this ever popular procession through the streets of Bloemfontein, with decorated floats and students cradling collection tins proceeding to Chevrolet Park. The 2012/2013 UFS Rag queen, Mr Rag and their retinue will greet the public from the main float. Finalists for the 2013/2014 UFS Rag queen and Mr Rag titles, as well as drum majorettes, will also accompany the procession.

Do not miss out on this wonderful family festival – come early, bring your family and picnic blanket/chairs to ensure a great spot on the grass – a variety of refreshments will be on sale.

Tickets available from Computicket and entrance gates.

Tickets: R60 per person
R30 per child under 12

We would also like to make use of this opportunity to remind you of our vibrant 2013/2014 UFS Rag coronation ball, where the UFS Rag queen and Mr Rag CS for 2014 will be crowned on 14 February 2014 in the Callie Human Centre, UFS Campus.

Limited tickets will be available at R500 per couple and can be bought from the Rag Community Service office from 5 February 2014.

Enquiries:

Karen Scheepers +27(0)51 401 2423 ( ScheepersK@ufs.ac.za )
Esmé Wessels +27(0)51 401 3769 ( Wesselse@ufs.ac.za )

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