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Browsing Natural and Agricultural Sciences by Supervisor "Kfir, R. (Rivka), 1951-"
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(University of Pretoria, 2011-10-21)The African bollworm, Helicoverpa armigera (Hübner) (Lepidoptera: Noctuidae), is a polyphagous pest that attacks many crops in sub-Saharan Africa. The pest is currently managed through chemical control, and by planting ...
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(University of Pretoria, 2016)Global climate change is expected to increase average surface temperatures by 1.5 to 4.5 °C by the end of the 21st century. Major variation in climatic conditions is predicted to occur, including more frequent droughts and ...
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(University of Pretoria, 2005-12-01)The Department of Water Affairs and Forestry (DW AF) is the custodian of South Africa's water resources and its primary role is to maintain the fitness for use of water on a sustained basis. DW AF recognized that management ...
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(University of Pretoria, 1997)In this study, surface and ground water were used to evaluate the impact of disinfection processes (chlorination, chloramination, ozonation, UV irradiation and hydrogen peroxide) on bacterial regrowth and bioftlm formation ...
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