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Dissertations / Theses on the topic 'Chromolaena odorata'

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Published: 4 June 2021

Last updated: 25 July 2025

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1

Uyi, Osariyekemwen. "Aspects of the biology, thermal physiology and nutritional ecology of Pareuchaetes insulata (Walker) (Lepidoptera: Erebidae: Arctiinae), a specialist herbivore introduced into South Africa for the biological control of Chromolaena odorata (L.) King and Robinson (Asteraceae)." Thesis, Rhodes University, 2015. http://hdl.handle.net/10962/d1017916.

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Chromolaena odorata (L.) King and Robinson (Asteraceae) is an invasive weedy shrub native to the Americas that has proven to be a significant economic and ecological burden to many tropical and sub-tropical regions of the world where it impacts negatively on agriculture, biodiversity and livelihoods. A distinct biotype of C. odorata was first recognised as naturalized in KwaZulu-Natal (KZN) province, South Africa, in the 1940s and has since spread to other climatically suitable provinces. Pareuchaetes insulata (Walker) (Lepidoptera: Erebidae: Arctiinae) was released in KZN, South Africa, as a

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2

Dumalisile, Lihle. "Effects of Chromolaena odorata on mammalian biodiversity in Hhluhuwe iMofolozi Park, South Africa." Pretoria :[s.n.], 2008. http://upetd.up.ac.za/thesis/available/etd-07102008-102018.

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3

Dew, L. Alexander. "Monitoring and managing Chromolaena odorata in a South African savanna reserve : Evaluating the efficacy of current control programs in response to ecological factors and management protocols." Thesis, Umeå universitet, Institutionen för ekologi, miljö och geovetenskap, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-104590.

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Biological invasions have increased dramatically in the past centuries and are one of the greatest threats to biodiversity today. Invasions occur when organisms are introduced at a location to which they are non-native, and they reproduce and spread, causing damage to the environment. Chromolaena odorata, a herbaceous shrub from the Americas, is one of the most widespread and problematic invasive plant species in the tropics and sub-tropics. The plant is a serious problem in South Africa, where invasive species threaten the nation’s biodiversity and limited water supply. This study combined tr

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4

Assemien, Embi Féline Laurenza. "Impact de pratiques agricoles conventionnelles et innovantes sur la fertilité des sols et les acteurs microbiens impliqués dans la zone de savanes humides de Côte d’Ivoire." Thesis, Lyon, 2018. http://www.theses.fr/2018LYSE1103/document.

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En Afrique de l'Ouest, les sols de savanes humides se caractérisent par des concentrations extrêmement basses de matières organiques, d'azote minéral, de phosphore et de cations basiques, ce qui limite la production primaire. Ce travail a analysé comment des changements particuliers dans les utilisations des terres peuvent influencer le fonctionnement et la fertilité des sols, pour in fine soutenir la production des agroécosystèmes dans cette zone de savane. Six différents types d'utilisation des terres sur 9 parcelles expérimentales répartis à l’échelle du paysage du centre-sud de la Côte d’I

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Almeida, Neto Mario. "Autocorrelação espacial e variação temporal na fenologia floral, produção e predação de sementes em Chromolaena odorata (Asteraceae)." [s.n.], 2003. http://repositorio.unicamp.br/jspui/handle/REPOSIP/316252.

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Orientador: Thomas Michael Lewinsohn<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Biologia<br>Made available in DSpace on 2018-08-03T15:00:40Z (GMT). No. of bitstreams: 1 AlmeidaNeto_Mario_M.pdf: 3490696 bytes, checksum: acc4a9eb38f12cc9199039e1caf0cfdf (MD5) Previous issue date: 2003<br>Resumo: Estudei a fenologia floral de uma importante espécie de planta invasora em seu habitat nativo. Meu objetivo foi avaliar se parâmetros fenológicos, como a duração, o início, o fim e a sincronia floral das plantas apresentavam alguma estruturação espacial e quais as cons

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6

Von, Senger Inge. "An assessment of the genetic diversity and origin of the invasive weed Chromolaena Odorata (L.) King and Robinson in South Africa." Thesis, Rhodes University, 2002. http://hdl.handle.net/10962/d1003802.

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Chromolaena odorata (L.) King and Robinson is an alien invasive weed to most of the Old World tropical regions of the earth, including South Africa where it is morphologically distinct from most other C. odorata plants examined from both its native and invasive range. It is thought that these morphological differences are related to difficulties encountered in successful establishment of biological control agents on the South African population of C. odorata. It has been postulated that the source population of the South African population will harbour potential biocontrol agents that will be

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7

Tantsi, Nolubabalo. "Long-term impacts of Chromolaena odorata (L.) invasion and ungulate grazing on ant body size and communities in Hluhluwe-iMfolozi Park, South Africa." Diss., University of Pretoria, 2012. http://hdl.handle.net/2263/30949.

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The present study investigated the impacts of Triffid weed Chromolaena odorata infestation and ungulate grazing on native ant communities in Hluhluwe-iMfolozi Park (HiP), in KwaZulu-Natal province, South Africa. HiP is a highly valued park because of its unique biodiversity. However, management of biodiversity in this park is intimidated by restructuring disturbances produced by invasions by alien plants and grazing. C. odorata is a highly invasive plant known to invade to an impenetrable extent, out shading and eliminating all competition of indigenous vegetation to many parts of the wo

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8

Gunasekera, Taligama Gamaralalage Lalith Gamini. "Physiological studies on growth and development of weed species, with particular reference to Galium aparine L. (Cleavers) and Chromolaena odorata (L.) K. & R." Thesis, Bangor University, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.334737.

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9

Atindehou, Ménonvè. "Caractérisation structurale et biologique de nouveaux agents antibactériens naturels actifs dans les infections intestinales : des peptides de la chromogranine A et des principes actifs de Chromolaena odorata." Phd thesis, Université de Strasbourg, 2012. http://tel.archives-ouvertes.fr/tel-00856585.

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Les premières souches bactériennes résistantes aux antibiotiques sont connues depuis 70 ans et se sont multipliées ces dernières années posant un grave problème de santé publique. Parmi les nombreux types d'infections induites par ces bactéries, nous nous sommes intéressés aux infections intestinales qui peuvent dégénérer en maladies inflammatoires de l'intestin et cancers. Notre travail de thèse a consisté à proposer des outils thérapeutiques dans le traitement des pathologies intestinales infectieuses : des peptides antimicrobiens dérivés de la chromogranine A et des extraits de plantes de l

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10

Fonche, Florentin Mongeng. "The impact of alien plant invasions on biodiversity in South Africa : the case of alien Acacia species in the Gauteng and Chromolaena odorata in the KwaZulu Natal Provinces." kostenfrei, 2005. http://deposit.ddb.de/cgi-bin/dokserv?idn=978419995.

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11

Autfray, Patrice. "Effets de litières sur l'offre en azote d'origine organique dans des systèmes de culture de maïs à couvertures végétales Etude de cas dans la zone à forêt semi-décidue de Côte d'Ivoire." Phd thesis, Université Montpellier II - Sciences et Techniques du Languedoc, 2002. http://tel.archives-ouvertes.fr/tel-00825211.

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Un dispositif agronomique pérennisé entre 1995 et 1999 avec des systèmes de culture de maïs à couvertures végétales a été installé dans la zone écologique à forêt semi-décidue de Côte d'Ivoire. L'offre en N d'origine organique est étudiée dans le cadre de systèmes de culture de maïs, avec une durée de jachère de 6 mois (SC6MJ) et 18 mois (SC18MJ). Les jachères sont occupées soit par Chromolaena odorata (subspontanée), soit par Pueraria phaseoloides (introduite). Ces quatre systèmes sont comparés à deux témoins, un sans Chromolaena pour les SC6MJ et un avec brûlis de Chromolaena pour les SC18MJ

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12

Erasmus, Daniël Jacobus. "Achene biology and the chemical control of Chromolaena odorata." Thesis, 1985. http://hdl.handle.net/10413/10530.

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13

Yi-ying, Tseng, and 曾怡頴. "Seasonal Dynamic Change in Spectrum of Mikania micrantha and Chromolaena odorata." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/46076226375124912967.

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碩士<br>國立屏東科技大學<br>森林系所<br>99<br>As an island country, Taiwan has unique ecosystem and abundant natural resources. However, invasive plants impact the forest ecosystem in Taiwan in both economy and biodiversity aspects. In order to assess the possibility of remote sensing monitoring for invasive herb species through utilising GER1500 this research regularly measured the reflectance spectrum of Mikania micrantha and Chromolaena odorata. Seasonally dynamic variations of the reflectance spectrum were also observed. By simulating the wave band range of multispectral scanner and hyperspectral scann

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14

Mgobozi, Mandisa Pride. "Spider community responses to Chromolaena odorata invasion, grassland type and grazing intensities." Diss., 2008. http://hdl.handle.net/2263/26800.

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Biological indicators measure components of the biota and are used to give general information about complex ecosystems in which they occur, playing key roles in conservation planning and management. This study illustrates the impact of habitat change by factors that are extrinsic to the habitats in question and the importance of spider responses in aiding management decisions. The spider responses illustrated existence of environmental change and represent responses of other biota. The conclusions drawn from this study have important management implications for protected areas with grazing he

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15

Wessels, Mathias Fittschen. "The role of fire and mechanical clearing in the management of Chromolaena odorata." Thesis, 2006. http://hdl.handle.net/10413/5492.

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The effects of fire and mechanical clearing were investigated for their potential in assisting with the eradication of Chromolaena odorata (previously Eupatorium odoratum). The study was divided into two focus areas, the first focused on mechanical clearing of dense stands of C. odorata on three sites and the second focused on the long term influences of a single burn on C. odorata plants in the different size categories. For mechanical clearing, two key issues were investigated; namely whether this type of clearing procedure was effective in dense C. odorata stands and whether rehabilitation

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16

Dumalisile, Lihle. "Effects of Chromolaena odorata on mammalian biodiversity in Hluhluwe-iMfolozi Park, South Africa." Diss., 2008. http://hdl.handle.net/2263/26178.

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This study investigated the effects of the Triffid weed Chromolaena odorata on small and large mammals in Hluhluwe-iMfolozi Park. C. odorata is a widespread invasive alien plant that poses threat to the highly maintained natural vegetation in HiP and most other protected areas in KwaZulu-Natal. Following the opinion that the effects of invasive alien plants on all levels of biodiversity need to be recognised for their effective control, we compared small and large mammal species richness and diversity between areas with differing C. odorata invasion durations, areas with differing clearing tim

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17

Howison, Ruth Alison. "Food preferences and feeding interactions among browsers and the effect of an exotic invasive weed Chromolaena odorata on the endangered black rhino (Diceros bicornis), in an African savanna." Thesis, 2009. http://hdl.handle.net/10413/7976.

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Biodiversity changes, often resulting from climate change, land transformation, and the transportation of organisms across geographical barriers are among the most important human induced global changes. To optimize the spatial allocation of conservation efforts, and how to best protect indigenous species, requires an understanding of the principal determinants that structure ecological communities and ecosystems. We studied community-level interaction among a diverse assemblage of specialist and generalist browsers in an African savanna. Hluhluwe-iMfolozi Park (HiP), South Africa, hosts a com

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18

"The effect of elevated atmospheric CO2 on the growth and physiology of Chromolaena odorata." Thesis, 2008. http://hdl.handle.net/10413/449.

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Rising atmospheric CO2 (Ca) concentrations have generated concern among scientists, mainly because of CO2’s role as a greenhouse gas and its influence on plant growth and development. Previous research has suggested that future CO2 enriched atmospheres may enhance the success of invasive aliens. Chromolaena odorata is an example of an invasive alien proving to be a serious threat to indigenous vegetation in South Africa, and effective control measures are desperately needed to curb infestations in the future. The current study aimed at assessing the response of C. odorata to elevated Ca and in

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19

Thiombiano, Amadou, and 田巴諾. "Life History and Host Specificity of Pareuchaetes pseudoinsulata on Chromolaena odorata in Quarantine Laboratory." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/94132996334008817591.

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碩士<br>國立屏東科技大學<br>熱帶農業暨國際合作系所<br>96<br>This study was aimed at determining the life history and evaluating the host specificity of the leaf-feeding moth, Pareuchaetes pseudoinsulata Rego Barros on Siam weed Chromolaena odorata (L.). The immature stages of P. pseudoinsulata could be divided into egg, 6 discernable larval instars as well as pre-pupal and pupal stages. The efficiency of P. pseudoinsulata feeding on C. odorata from 5th to 6th instar was observed with a mean consumption by each larva ranging from 28 to 97% of leaf area. The fecundity of P. pseudoinsulata was affected by the variati

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20

Gareeb, Milly. "Investigation into the mortality of potted Chromolaena odorata (L.) R. M. King & H. Robinson (Asteraceae)." Thesis, 2007. http://hdl.handle.net/10413/462.

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The neotropical semi-woody perennial shrub Chromolaena odorata (L.) King and Robinson (Asteraceae: Eupatorieae) has become a serious invasive weed in the sub-tropical regions of southern Africa, resulting in the initiation of an insect biocontrol research programme at Cedara in the KwaZulu-Natal province. The programme has experienced difficulties in growing and maintaining healthy potted C. odorata plants for research, for almost ten years. In an attempt to identify possible causes of mortality, plants were grown on elevated grids in two trials; (winter-spring 2003) and (autumn-winter 2004) i

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21

Goodall, Jeremy Marshall. "Monitoring serial changes in coastal grasslands invaded by Chromolaena odorata (L.) R.M. King and Robinson." Thesis, 2000. http://hdl.handle.net/10413/10246.

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The objective of this study was to describe the impacts of the density of Chromolaena odorata (chromolaena) on species composition in coastal grasslands and to investigate serial changes in the vegetation following the implementation of a burning programme. The thesis deals with key ecological concepts and issues, so a comprehensive literature review is included. Chromolaena invades coastal grasslands that are not burnt regularly (i.e. biennially). Grasslands that were not burnt for 30 years were seral to secondary forest. The successional pathway from open grassland to closed canopy forest va

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22

Kang, Chang-Jung, and 康昌榮. "Ecophysiological Studies on the Seed Germination of Chromolaena odorata (L) R. M. King & H. Rob." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/07362300640834641976.

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碩士<br>國立嘉義大學<br>農學研究所<br>99<br>The purposes of this study were to test the ecological characteristics of seed germination and to evaluate the effects of herbicide on the seed germination and seeding growth of Chromolaena odorata (L) R. M. King & H. Rob., and a comparison of seedling vigor of Bidens pilosa, Mikania micrantha, and C. odorata (L) R. M. King & H. Rob. was performed. The seeds were germinating at a constant temperature between 20 and 40℃, and the constant temperature resulting in the optimum germination was at 30℃, the germination percentage higher than 60 %. As using an alternatin

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23

Howison, Owen Erik. "How do alien plants invade : an analysis of the historical spread and potential distribution of the invasive alien plant Chromolaena odorata in and around Hluhluwe Game Reserve." Thesis, 2009. http://hdl.handle.net/10413/8357.

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Alien plant invasions and human-induced land transformations are the two most important factors contributing to loss of biodiversity, and Chromolaena odorata (C. odorata) is one of the world’s worst invader plants. It impacts negatively on biodiversity conservation, forestry and agriculture due to its rapid rate of spread, fast growth and hence an ability to transform habitats. It was introduced into KwaZulu-Natal, South Africa in the mid-1940s, and has spread north and southwards along the coastline and adjacent interior. In 1961 it was observed in Hluhluwe Game Reserve, and has invaded and t

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24

"Autocorrelação espacial e variação temporal na fenologia floral, produção e predação de sementes em Chromolaena odorata (Asteraceae)." Tese, Biblioteca Digital da Unicamp, 2004. http://libdigi.unicamp.br/document/?code=vtls000296152.

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25

Anyasi, Raymond Oriebe. "Bioremediation of polychlorinated biphenyls (PCBs)-contaminated soil by phytoremediation with Chromolaena odorata(L) R.M. King and Robinson." Diss., 2012. http://hdl.handle.net/10500/6103.

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The ability of Chromolaena odorata propagated by stem cuttings and grown for six weeks in the greenhouse to thrive in soil containing different concentrations of PCB congeners found in Aroclor and transformer oil, and to possibly remediate such soil was studied under greenhouse conditions. Chromolaena odorata plants were transplanted into soil containing 100, 200, and 500 ppm of Aroclor and transformer oil (T/O) in 1L pots. The experiments were watered daily at 70% moisture field capacity. Parameters such as mature leaves per plant, shoot length, leaf colour as well as the root length at harve

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26

Naidoo, Kubendran Kista. "Ecophysiological studies of the invasive weed Chromolaena odorata (L.) King and Robinson and its control in KwaZulu-Natal." Thesis, 2013. http://hdl.handle.net/10413/11221.

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Despite increased interest in the control and spread of the alien weed, Chromolaena odorata, little is known of its photosynthetic characteristics under field conditions. The aim of the study was to obtain a better understanding of the ecophysiological attributes of C. odorata that contribute to its invasive success. Photosynthetic performance of C. odorata was evaluated by monitoring diurnal changes in gas exchange, chlorophyll a fluorescence and plant water relations. Gas exchange characteristics of plants growing in exposed and shaded environments, as well as seasonal patterns, were evaluat

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27

Wang, Tzu-Hui, and 汪慈慧. "Host range of Pareuchaetes pseudoinsulata Rego Barros (Lepidoptera: Arctiidae) and its population parameters on the weed, Chromolaena odorata (L.) (Compositae)." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/93810333525446144342.

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碩士<br>國立屏東科技大學<br>熱帶農業暨國際合作研究所<br>93<br>Chromolaena odorata (L.) introduced around 1989 to southern part of Taiwan as a medicinal plant, has become an invasive weed, spreading to such counties as Pingtung, Kaohsiung, Tainan, Chiayi, Yunlin, Changhau, Taichung, and Taitung. An arctiid moth, Pareuchaetes pseudoinsulata Rego Barros, was introduced from Guam in June 2004 and was immediately isolated for study host specificity and other research in a quarantine laboratory at National Pingtung University of Science and Technology. The life history of P. pseudoinsulata feeding on C. odorata was stu

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28

Dube, Nontembeko. "Investigation of the biology and cross-breeding of populations of Pareuchaetes insulata (Lepidoptera : Arctiidae) and the implications for the biological control of Chromolaena odorata (Asteraceae) in South Africa." Thesis, 2008. http://hdl.handle.net/10413/10777.

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Larvae of Pareuchaetes insulata were released in South Africa for the biological control of the invasive weed Chromolaena odorata. Pareuchaetes insulata has proved to be a difficult agent to establish in the field in South Africa, for various possible reasons. Populations collected from Florida and Jamaica (their aboriginal home) were released separately at several sites each in South Africa, but only one population (Florida) was definitely established. It is possible that adults from this established population interbred with adults from the Jamaican population released at nearby sites. The

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29

Malahlela, Oupa. "Intergrating environmental variables with worldview-2 data to model the probability of occurence of invasive chromolena odata in forest canopy gaps : Dukuduku forest in KwaZulu-Natal, South Africa." Thesis, 2013. http://hdl.handle.net/10413/10562.

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Several alien plants are invading subtropical forest ecosystems through canopy gaps, resulting in the loss of native species biodiversity. The loss of native species in such habitats may result in reduced ecosystem functioning. The control and eradication of these invaders requires accurate mapping of the levels of invasion in canopy gaps. Our study tested (i) the utility of WorldView-2 imagery to map forest canopy gaps, and (ii) an integration of WorldView-2 data with environmental data to model the probability of occurrence of invasive Chromolaena odorata (triffid weed) in Dukuduku forest ca

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30

Nzama, Sindisiwe N. "Population and behavioural studies on Calycomyza eupatorivora spencer (Diptera : Agromyzidae), a biological control agent of Chromolaena odarata (L.) King and Robinson (Asteraceae) in South Africa." Thesis, 2011. http://hdl.handle.net/10413/10096.

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Chromolaena odorata (L.) King and Robinson (chromolaena, triffid weed) (Asteraceae: Eupatorieae) is one of the most problematic weeds in the subtropical northeastern parts of South Africa. Calycomyza eupatorivora Spencer (Diptera: Agromyzidae) was introduced as a biological control agent for the control of this weed. No study has yet been done to quantify field populations of C. eupatorivora since its establishment in 2003. The aim of this study was therefore to measure aspects of the field population and laboratory behaviour of C. eupatorivora on C. odorata. The first objective was to determi

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31

Fonche, Florentin Mongeng [Verfasser]. "The impact of alien plant invasions on biodiversity in South Africa : the case of alien Acacia species in the Gauteng and Chromolaena odorata in the KwaZulu Natal Provinces / vorgelegt von Florentin Mongeng Fonche." 2005. http://d-nb.info/978419995/34.

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