An investigation into the circumstances relating to the cattle-killing delusion in Kaffraria, 1856-1857
- Authors: Dowsley, Eileen D'Altera
- Date: 1932
- Subjects: Cattle Killing, 1856-1857 , Cape of Good Hope (South Africa) -- History -- 1853-1871 , Xhosa (African people) -- History , Grey, George, Sir, 1812-1898 , Nongqawuse, 1841-1898 , Mhlakaza -- Xhosa seer -- 1800?-1857 , Sarhili -- Xhosa paramount chief -- ca.1814-1892
- Language: English
- Type: text , Thesis , Masters , MA
- Identifier: vital:2538 , http://hdl.handle.net/10962/d1002390
- Description: Introductory: If the relations existing between the Native chiefs and the Colony which Sir George Grey found on his arrival are to be fully understood, a brief consideration of Cathcart’s policy and Frontier settlement is necessary. When Cathcart came out as Governor in 1852, he found the rebel chief Sandile, with associate chieftans’ and large bands of followers, still occupying their locations in the Amatola ranges. From this haunt no force had as yet been able to drive them. During the series of skirmishes known as the Eighth Kaffir War, their first crop of Indian corn was destroyed so early in the season as to allow of a second crop springing up. This unusual phenomenon inspired prophet Umlangeni to claim that he had worked a miracle. Fortunately later reverses and the expulsion of Sanailli from his mountain fastness discredited this thoughtful opportunist. Sandilli, as paramount chief of the Gaikas, might have held and influential position in the councils of the Kaffrarian chiefs, that he did not hold such a position, was due, in Charles Brownlee’s opinion, to his timid and suspicious nature and to the fact that his mental capacity was ‘hardly above mediocrity’. He was unable to fight owing to lameness, and he lacked ‘sufficient’ resciution and strength of mind to resist the evil influence of the bad advisers, nevertheless he could be obstinate and he never, to the end of his life, gave up on the idea of getting back to this old locations in the Amatolas. Macomo with some three thousand followers had likewise evaded all attempts to turn him out of this haunts in the mountain range. He, together with his associate the Tambookie chief Quesha, and diverse rebel Hotttentots, indulged in the frequent marauding forays into the surrounding country. Macomo was the eldest of Gaika’s sons and was “allowed by all to be the greatest politician and best warrior in Kaffraria’. During the minority of Sandilli Macomo had acted as his regent and had attained great influence over the tribe; this he afterwards lost for he moved to the neighbourhood of Fort Beaufort, where in a state of intoxication most of this time was passed. He had in Brownlee’s opinion, done more mischief in the war than any other chief. Great jealously was felt between Macomo and Sandilli, especially on the part of the former; this was shown through the cattle killing period in his efforts to involve Sandilli, while attempting to keep on the right side of the Government himself. Further south, indeed within the Colony itself, such petty chiefs as Seyolo and Botman, lurking in the Fish River bush, and the Keiskamma kloofs, rendered the main road dangerous, and even succeeded, for a time, in completely cutting the ling of communication between Kingwilliamstown and Grahamstown.
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- Date Issued: 1932
Post-release evaluation of the biological control programme against Cereus jamacaru De Candolle (Cactaceae), in South Africa
- Authors: Sutton, Guy Frederick
- Date: 2017
- Language: English
- Type: text , Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/7982 , vital:21330
- Description: Cereus jamacaru De Candolle (Cactaceae) is an environment-transforming weed of both agricultural and wildlife habitats in South Africa. Weed infestations reduce carrying capacity of the land, and pose a risk to livestock, wildlife and human safety due to the plant’s spiny thorns. The weed is considered to be under complete biological control in South Africa, due to its introduced control agent, Hypogeococcus festerianus Lizer y Trelles (Hemiptera: Pseudococcidae), although observational reports suggest that the level of success achieved is variable. In this thesis, a formal post-release evaluation of this biological control programme was conducted, specifically to determine the efficacy of H. festerianus as a biological control agent, and to identify factors which may limit or constrain the level of success achieved by the control agent. These data were collected with the intention of improving the control of C. jamacaru in South Africa. A field-based study of C. jamacaru population demographics investigated the efficacy of H. festerianus as a biological control agent of the weed, by integrating weed growth, fecundity and survival metrics with C. jamacaru population dynamics and demographic patterns from 8 sites where H. festerianus was present and 14 sites where the control agent was absent. The findings indicated that H. festerianus significantly reduced weed fecundity, which resulted in fewer seedling recruits, and that levels of plant mortality were greater at sites where H. festerianus was present. The reduction in weed fecundity and survival translated into negative population-level consequences for H. festerianus. Weed-population age frequency distributions in the absence of H. festerianus demonstrated a “reverse J-shaped” distribution, indicative of high recruitment rates and population stability, while C. jamacaru populations infected with H. festerianus were described by bell-shaped distributions, and were typified by limited recruitment, or a complete lack thereof. By constraining recruitment and inhibiting selfregeneration, H. festerianus appears to regulate populations of C. jamacaru. Predation and parasitism of H. festerianus was believed to be a limiting factor for the biological control programme against C. jamacaru in South Africa, although no formal evaluation of this claim had been undertaken. Accordingly, the assemblage of natural enemies acquired by H. festerianus in South Africa was identified by field-collections of infected H. festerianus gall-material. Further, timed point-count surveys of natural enemies associated with H. festerianus were performed and integrated with the data on the impact of H. festerianus on weed population dynamics to assess the impact of two prominent predaceous taxa on H. festerianus efficacy as a biological control agent. Although H. festerianus had acquired a diverse suite of novel natural enemies in South Africa, this has not prevented the biocontrol agent from having an impact on C. jamacaru populations, although other subtler effects cannot be ruled out. This study showed that biological control efforts employing H. festerianus for the management of C. jamacaru have been successful. Furthermore, these data demonstrated the utility of retrospective analyses in developing and improving the science of biological control, specifically how to improve candidate agent prioritisation, determining how many agents are required for successful biological control, and how to evaluate the success of biological control efforts. Improvements in our theoretical understanding of biological control will undoubtedly reduce costs of biological control programmes, improve success rates, and increase the predictability of biological control.
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- Date Issued: 2017