Browsing Natural and Agricultural Sciences by Subject "Risk assessment"
Now showing items 1-10 of 11
-
Assessment of Brassica napus gene flow potential to wild relatives in northern South Africa
(2016)The Brassicaceae, distributed throughout South Africa, is a family in which hybridization may occur between cultivated species and its wild and weedy relatives. Hybridization with transgenic varieties could increase the ... -
Assessment of organic pollutants in selected wild and domesticated bird eggs from Gauteng, South Africa
(North-West University, 2010)Polybrominated flame retardants (BFRs), organochlorine pesticides (OCPs) and polychlorinated biphenyls (PCBs) were analysed in eggs of various wild bird species from industrialised areas in South Africa. Eggs were collected ... -
A comparative study of arthropod diversity on conventional and Bt–maize at two irrigation schemes in South Africa
(North-West University, 2011)The purpose of the research was to explore the experiences of educators regarding the training for the implementation of inclusive education in a Full Service school. A qualitative research design was chosen, using a ... -
Geo-environmental and physical risk associated with the derelict and ownerless gold mines from Transvaal- Drakensberg and Barberton Greenstone Belt Gold Fields, Mpumalanga Province, South Africa
(North-West University, 2019)Historically mines had poor reputation for addressing environmental and safety concerns during mining and at mine closure as a result historic mining areas are left with large open pits, unsealed shafts filled with water ... -
The geohydrology and related stability of the dolomite aquifer underlying Ikageng : Potchefstroom
(North-West University (South Africa), Potchefstroom Campus, 2017)Following large scale sinkhole formation on the Far West Rand as a direct result of mining related dolomite dewatering, groundwater is now known as an important factor affecting the stability of cavernous dolomite. Ikageng ... -
A holistic view on the impact of gold and uranium mining on the Wonderfonteinspruit
(North-West University, 2012)The Wonderfonteinspruit (WFS) flows through the richest gold mining region in the world and has subsequently been exposed to the related pollution for more than a century. In order to determine the extent of mining related ... -
The indirect effect of Cry 1Ab protein expressed in Bt maize, on the biology of Chrysoperla pudica (Neuroptera: Chrysopidae)
(2014)Genetically modified (GM) maize was developed mainly to control lepidopteran pests such as the maize stem borer (Busseola fusca) (Lepidoptera: Noctuidae). Since the first commercialization of GM crops with insecticidal ... -
A methodology to quantify the risks of urbanisation on groundwater systems in South Africa
(North-West University, 2014)Each year, the urbanised population grows exponentially and due to this growth, cities are forced to expand beyond their manageable borders resulting in greater pressure on the surrounding urban environment. Many South ... -
Oviposition site preference of lacewings in maize ecosystems and the effect of Bt maize on Chrysoperla pudica (Neuroptera: Chrysopidae)
(North-West University, 2010)Resistance development and possible non–target effects have been of concern since the first deployment of genetically modified crops with insecticidal properties. It is especially at the third trophic level and with important ... -
Response of selected non-target Lepidoptera, Coleoptera and Diptera species to Cry1Ab protein expressed by genetically modified maize
(North-West University, 2010)The environmental impacts of genetically modified (GM) crop plants such as Bt (Bacillus thuringiensis) maize have not yet been fully assessed in South Africa. Bt maize designed to express Bt endotoxin for control of Busseola ...