Recent investigations into the toxicity of known and unknown poisonous plants in the Union of South Africa IX

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dc.contributor.author Van der Walt, S.J.
dc.contributor.author Steyn, Douw G.
dc.contributor.editor Du Toit, P.J.
dc.date.accessioned 2016-07-11T12:01:05Z
dc.date.available 2016-07-11T12:01:05Z
dc.date.created 2016
dc.date.issued 1939
dc.description The articles have been scanned in colour with a HP scanjet 5590; 300dpi. Adobe Acrobat XI Pro was used to OCR the text and also for the merging and conversion to final presentation PDF-Format. en_ZA
dc.description Includes bibliographical references en_ZA
dc.description.abstract The toxicity of thirty-three plants was investigated. According to the available literature the following ten plants were proved for the first time to be toxic: Lotononis laxa, Cotyledon coruscans, Cotyledon campanulata, Asaemia axillaris, Zygophyllum Morgsana, Urginea sp., Hymenocylus Smithii, Drosanthemum sp. probably D. hispidum, Chironia baccifera and Senecio sp. ab. Kraamwinkel, Settlers, July, 1937. It was also established that Dimorphotheca caulescens and Dichrostachys nyassana contain hydrocyanic acid. It is interesting to note that according to our present knowledge we can divide the poisonous species of cotyledon into three groups according to the symptoms caused by them, viz (A) those species (C. decussata, C. ventricosa, C. obovata, C. Wallichii, etc., containing cotyledontoxin), which cause “Krimpsiekte" (cotyledonosis), (B) those species (C. campanulata) which contain hydrocyanic acid, and (C) those species (C. coruscans) which cause pronounced gastrointestinal irritation (haemorrhagic enteritis). The active principle responsible for the severe irritation is unknown. The species of Cotyledon coruscans tested by us, however, also contained a small quantity of cotyledontoxin, but not in such quantities as to cause ''krimpsiekte''.
dc.description.librarian ab2018
dc.format.extent 32 pages : illustrations en_ZA
dc.identifier.citation Van der Walt, SJ & Steyn, DG 1939, 'Recent investigations into the toxicity of known and unknown poisonous plants in the Union of South Africa, IX', Onderstepoort Journal of Veterinary Science and Animal Industry, vol. 12 , no. 2 , pp. 335-366 en_ZA
dc.identifier.issn 0330-2456
dc.identifier.uri http://hdl.handle.net/2263/54939
dc.language.iso en en_ZA
dc.publisher Pretoria : Government Printer en_ZA
dc.rights ©ARC-Onderstepoort and Faculty of Veterinary Science, University of Pretoria (original). ©University of Pretoria. Department of Library Services (digital). en_ZA
dc.subject Poisonous plants en_ZA
dc.subject Cotyledontoxin en_ZA
dc.subject.lcsh Veterinary medicine -- South Africa
dc.subject.lcsh Veterinary toxicology en_ZA
dc.title Recent investigations into the toxicity of known and unknown poisonous plants in the Union of South Africa IX en_ZA
dc.type Article en_ZA


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