https://ir.unisa.ac.za/handle/10500/7058 Mon, 04 May 2026 08:51:33 GMT 2026-05-04T08:51:33Z https://ir.unisa.ac.za/handle/10500/7635 Sublethal effects of insecticides on the reproductive success of the Tsetse species Glossina pallidipes and G. m. morsitans Kibuka-Sebitosi E. Female Glossina pallidipes Austen and G. m. morsitans Westwood (Diptera: Glossinidae) were treated with deltamethrin or pyrethrum extract through topical application or by exposure to cloth or glass treated with the same insecticides. Reproductive performance was assessed in terms of survival, pupae number and viability and reproductive deformities and abnormalities within the reproductive systems including abortions. Survival and fecundity of treated flies were significantly reduced (P<0.001). Pupae were small, mostly non-viable, and were arrested at various stages of development. Abortions of egg and all stages of larvae were observed in pregnancy cycles 1-7 following insecticide treatment. Various concentrations ranging from 1-1014 nanograms per micro litre (ng/μL) of insecticide in redistilled acetone topically applied (1μ/fly) on the dorsal thorax of the females, 24 hr after their previous blood meal, resulted in both insecticides in various concentrations causing reproductive abnormalities in both species, including egg reabsorption after ovulation. The sublethal effects were observed to prevent ovulation altogether in some of the flies, which implies effects on the reproductive performances and control strategies for tsetse flies. Sublethal doses could impact negatively on beneficial organisms in the environment where tsetse flies occur mainly riverine, woodlands and forest ecosystems. Fri, 01 Jan 2010 00:00:00 GMT https://ir.unisa.ac.za/handle/10500/7635 2010-01-01T00:00:00Z https://ir.unisa.ac.za/handle/10500/7634 Art and/as Anarchy: Portraying the artist during times of turmoil and war Roos H. Two South African novels, Congo Song (Cloete [1943]1973) and Moxyland (Beukes 2008) comment on the central part played by artists and their work in the midst of a society on the brink of war. Both narratives are set in Africa; one portrays a close-knit white community in the Congo in 1939, facing the collapse of their colonial way of life, the other depicts the apocalyptic nature of a dystopian Cape Town around 2018, reflecting the global reality of environmental catastrophe, deadly epidemics and state and corporate tyranny. In both texts art and artists play pivotal roles within a group of characters, and their views of their work, the multiple manifestations of creative art and the relationship between their specific communities and what is regarded there as art, form an integral part of the narrative whole. This article focuses on how various textual strategies are exploited to reveal how the creative urge is linked with resistance against as well as support for destructive violence. It also discusses aspects of the novels that are structured to, on the one hand, endorse the quest for romantic aestheticism and, on the other hand, forecast the reign of cyberspace and genetically modified art. 2011 04 15. © JLS/TLW. Fri, 01 Jan 2010 00:00:00 GMT https://ir.unisa.ac.za/handle/10500/7634 2010-01-01T00:00:00Z https://ir.unisa.ac.za/handle/10500/7633 Zulu Noun Classes Revisited: A Spoken Corpus-Based Approach Mtholeni N.N. [No abstract available] Fri, 01 Jan 2010 00:00:00 GMT https://ir.unisa.ac.za/handle/10500/7633 2010-01-01T00:00:00Z https://ir.unisa.ac.za/handle/10500/7609 A tribute to Professor John R. Moss Sivaramakrishna A.; Clayton H.S. [No abstract available] Thu, 01 Nov 2012 00:00:00 GMT https://ir.unisa.ac.za/handle/10500/7609 2012-11-01T00:00:00Z