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Dissertations / Theses on the topic 'Fusarium diseases of plants – Malawi'

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Published: 4 June 2021
Last updated: 3 February 2022

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1

Msibi, Happy Hazel. "Studies toward the stereoselective synthesis of the C(10)-C(20) unit of the fumonisins using Sharpless methodology." Pretoria : [s.n.], 2006. http://upetd.up.ac.za/thesis/available/etd-08102007-135031.

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2

Odom, Jennifer Lorraine. "Evaluation of Field Pea Varieties for Resistance to Fusarium Root Rot Pathogens." Thesis, North Dakota State University, 2017. https://hdl.handle.net/10365/28500.

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Fusarium root rot is one of the most important diseases of pulse crops, with numerous Fusarium spp. comprising the disease complex. Fusarium solani and F. avenaceum have been reported to be major pathogens in the pea root rot complex, and all commonly grown varieties are susceptible. Greenhouse methods to evaluate peas for resistance to Fusarium root rot resulted in inconsistent disease severity across varieties. In 2015, F. avenaceum infested field plots were more heavily damaged based on emergence and yield than F. solani infested plots, and opposite trends were observed in 2016. Differences
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3

Ariss, Jennifer J. "Pathological factors affecting persistence in alfalfa with emphasis on diseases incited by Fusarium and Colletotrichum species." Connect to this title online, 2005. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1117417525.

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Thesis (Ph. D.)--Ohio State University, 2005.<br>Title from first page of PDF file. Document formatted into pages; contains xiii, 118 p.; also includes graphics Includes bibliographical references (p. 114-118). Available online via OhioLINK's ETD Center
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4

Groenewald, Susan. "Biology, pathogenicity and diversity of Fusarium oxysporum f.sp. cubense." Pretoria : [s.n.], 2005. http://upetd.up.ac.za/thesis/available/etd-02232007-175712.

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5

Van, den Berg Noëlani. "Identification of genes associated with tolerance in the C Cavendish banana selection, GCTCV 218, against Fusarium oxysporum f.sp. cubense 'subtropical' race 4." Pretoria : [s.n.], 2006. http://upetd.up.ac.za/thesis/available/etd-11082006-171800.

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6

Akinsanmi, Olufemi Akinyemi. "Etiology and diversity of Fusarium species causing head blight of wheat in Australia /." [St. Lucia, Qld.], 2004. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe18247.pdf.

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7

Bian, Zhuyun. "Characterization of Effector Encoding Genes from the Novel Sugar Beet Pathogen Fusarium Secorum." Thesis, North Dakota State University, 2015. https://hdl.handle.net/10365/27711.

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A new disease of sugar beet, named Fusarium yellowing decline, was recently found in in the Red River Valley of MN and ND. This disease is caused by a novel pathogen named Fusarium secorum. Pathogens such as F. secorum secrete proteins during infection called ?effectors? that help establish disease. Since pathogenicity and disease development may depend on effector proteins produced by F. secorum during infection, effector protein identification furthers our understanding of the biology of this important pathogen. A list of 11 candidate effectors was generated previously. In this study, to cha
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8

Lui, Leung Hong 1952. "Factors influencing disease development and volatile production by Fusarium sambucinum and Pythium ultimum in stored potatoes." Thesis, McGill University, 2001. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=31262.

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Tubers of Russet Burbank were surface disinfested and 3 mm diameter by 3 mm deep wounds were made with cork borer. The holes were inoculated with 20muL of 104 macroconidia/ml suspension of (Fusarium sambucinum) or 20muL of 104 sporangia/ml suspension (Pythium ultimum) and incubated under mist. For infection studies, the inoculated tubers were exposed to 0--48 h of mist at 4--20ºC, dried and stored at 16ºC and 95% RH in growth chamber with forced air for 15 d (F. sambucinum), whereas stored at 12ºC and 95% RH for 30 d (P. ultimum). For lesion expansion studies tubers exposed to 24 h wet at 16ºC
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9

Fandohan, Pascal. "Fusarium infection and mycotoxin contamination in preharvest and stored maize in Benin, West Africa." Thesis, University of Pretoria, 2004. http://hdl.handle.net/2263/24999.

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10

Geddes, Jennifer M. H., and University of Lethbridge Faculty of Arts and Science. "Fusarium head blight of barley : resistance evaluation and identification of resistance mechanisms." Thesis, Lethbridge, Alta. : University of Lethbridge, Faculty of Arts and Science, 2006, 2006. http://hdl.handle.net/10133/399.

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An evaluation of nineteen barley lines using three artificial inoculation methods concluded that spray inoculation was the most reproducible method and provided the greatest discrimination of resistance. Six of the nineteen barley lines were used for proteomic studies to identify defense responses following F. graminearum infection. All lines responded by inducing an oxidative burst and pathogenesis-related proteins. Differences in response magnitude and the proteins activated could be attributed to varying levels of FHB resistance amongst the barley lines. RNA microarray profiling and iTRAQ t
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11

Shrestha, Subidhya. "Histology of Spot Blotch Infection in Barley, QTL Mapping of Resistance to Fusarium Head Blight, and Characterization of Root Rot Diseases in Wheat." Diss., North Dakota State University, 2017. https://hdl.handle.net/10365/28391.

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Three independent studies were conducted for spot blotch (Bipolaris sorokiniana), Fusarium head blight (FHB) (Fusarium graminearum), and root rot diseases (Fusarium species and B. sorokiniana). Histopathology of compatible and incompatible interactions between different pathotypes of B. sorokiniana and different genotypes of barley was examined with red fluorescent protein-tagged fungal isolates. The fungus penetrated the host cell wall and developed multicellular globular infection hyphae (IH) in the lumen of epidermal cells, but infected epidermal cells appeared to be alive till 16 hours pos
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12

Sun, Zhitan. "The pathogenicity of Fusarium spp. to Wheat Stem Sawfly, Cephus cinctus Norton (Hymenoptera: Cephidae)." Thesis, Montana State University, 2008. http://etd.lib.montana.edu/etd/2008/sun/SunZ0508.pdf.

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The wheat stem sawfly is the most destructive insect pest in both winter wheat and spring wheat production in the northern Great Plains. The sawfly is univoltine, and spends all immature stages within protective wheat stems, which explains the difficulty in controlling populations. However, the almost continuous inhabitation of stems also makes larvae more vulnerable to invasion by microorganisms colonizing both living stems and postharvest stubble. Fusarium spp. were frequently isolated from fungalcolonized larval cadavers, and were found to be the major lethal factors for overwintering larva
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13

Presello, Daniel A. "Studies on breeding of maize for resistance to ear rots caused by Fusarium spp. and on the occurrence of viruses in maize in eastern Canada." Thesis, McGill University, 2001. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=38260.

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Responses from pedigree selection for resistance to gibberella ear rot were assessed in four maize (Zea mays L.) populations, two selected after inoculation of Fusarium graminearum (Schwabe) macroconidia into the silk channel and two selected after inoculation into developing kernels. Responses were significant in both populations selected for silk resistance and in one of the populations selected for kernel resistance. Selection was more effective in later generations and genetic gains were associated with among-family selection but not with within-family selection. Results obtained here indi
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14

Gelderblom, Wentzel Christoffel Andreas. "Mycotoxicological properties of fusarium verticillioides and the fumonisins : mechanisms and implications for setting risk assessment parameters in humans." Thesis, Stellenbosch : Stellenbosch University, 2009. http://hdl.handle.net/10019.1/3971.

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Thesis (DSc (Biochemistry))--Stellenbosch University, 2009.<br>The fumonisin mycotoxins are known to be the causative principle for several animal diseases and are associated with the development of liver and oesophagus cancer and neural tube defects in humans. The thesis focuses mainly on the characterisation of the compounds from maize cultures of the fungus Fusarium verticillioides, isolated from maize, the toxicological effects in animals, mechanism involved in hepato- and nephrocarcinogenicity and discussing the major differences and contradictions in the literature together with th
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15

Schreuder, Wouter. "Characterization and pathogenicity of South African isolates of Fusarium oxysporum f. sp. melonis." Thesis, Stellenbosch : Stellenbosch University, 2000. http://hdl.handle.net/10019.1/51651.

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Thesis (PhD(Agric))--University of Stellenbosch, 2000.<br>ENGLISH ABSTRACT: The purpose of this study was to characterize the race and vegetative compatibility of Fusarium oxysporum f. sp. melonis (FOM) isolates collected in the major melon producing areas, to report on their geographical distribution, and their possible relatedness to isolates from other countries. Seventy two FOM isolates obtained from 30 fields in 17 melon producing regions were race-typed using the differential cultivars Topmark (susceptible to all races), Doublon (Fomi), CM 17187 (Fom2) and Perlita (Fom3) and group
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16

Schuh, Casey Steven. "Revisiting Management Practices for Diseases of Spring Barley in North Dakota." Thesis, North Dakota State University, 2018. https://hdl.handle.net/10365/28723.

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Common barley diseases observed in North Dakota include net blotch, spot blotch, leaf and stripe rust, bacterial leaf streak, and Fusarium head blight. The first objective of this research was to determine the effect of variety and fungicide timing on disease development of barley under conventionally tilled systems. Five field trials were performed in 2016-2017 to test the effect of common varieties and fungicide applications on foliar disease of barley. Overall, varietal selection had a greater effect on the level of foliar disease observed than fungicide application. The second objectiv
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17

Van, Dyk Kerien. "Fungi associated with root and crown rot of wheat and barley in Tanzania." Diss., University of Pretoria, 2003. http://hdl.handle.net/2263/25941.

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18

Kandolo, Sadiki Delphin. "Effect of fungicide seed treatments on germination and vigour of maize seed." Diss., University of Pretoria, 2008. http://hdl.handle.net/2263/29544.

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Fungicides have been developed to protect plants against diseases and pests, which cause serious problems such as the loss of germination and vigour. The aim of this study was to test the germination and vigour of maize (Zea mays L.) seeds treated with several fungicides Apron® Star 42 WS (difenoconazole, thiamethoxam, and metalaxyl-m), Apron® XL (mefenoxam), Celest® XL (fludioxonil, mefenoxam) and thiram in the laboratory. In the greenhouse, the efficacy of fungicide treatment was evaluated in soil inoculated with Fusarium graminearum. The control consisted of untreated seeds. Germination and
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19

Mandala, Giulia. "Reinforcing and broadening wheat resistance against Fusarium diseases by a barley deoxynivalenol detoxifying UDP‐glucosyltransferase and its pyramiding with ectopic glycosidase inhibitors." Thesis, Aix-Marseille, 2018. http://www.theses.fr/2018AIXM0132.

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Les maladies du blé causées par Fusarium, comme la brulure de l’épi (FHB) et la pourriture de la tige (FCR), entrainent une réduction de production, de la qualité du blé et des problèmes de sécurité alimentaire liés à la présence de mycotoxines affectant la santé de l’Homme et des animaux: la plus représentée étant le déoxynivalénol (DON). Le DON est un inhibiteur de la synthèse protéique qui agit durant l’infection comme un facteur de virulence. La glycosylation du DON en D3G (DON-3-O-glicoside) catalysée par des UDP-glycosyltransférases (UGTs) est le principal mécanisme de protection des pla
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20

Williams, Paul James. "Near infrared (NIR) hyperspectral imaging and X-ray computed tomography combined with statistical and multivariate data analysis to study Fusarium infection in maize." Thesis, Stellenbosch : Stellenbosch University, 2013. http://hdl.handle.net/10019.1/79904.

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Thesis (PhD)--Stellenbosch University, 2013.<br>ENGLISH ABSTRACT: Maize (Zea mays L.) is used for human and animal consumption in diverse forms, from specialised foods in developed countries, to staple food in developing countries. Unfortunately, maize is prone to infection by different Fusarium species that can produce harmful mycotoxins. Fusarium verticillioides is capable of asymptomatic infection, where infected kernels show no sign of fungal growth, but are contaminated with mycotoxins. If fungal contamination is not detected early on, mycotoxins can enter the food chain. Rapid and a
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21

Changaya, Albert Gideon. "Development of high yielding pigeonpea (Cajanus cajan) germplasm with resistance to Fusarium wilt (Fusarium udum) in Malawi." Thesis, 2007. http://hdl.handle.net/10413/968.

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22

Britz, van Heerden Henriette. "Taxonomy and population genetics of Fusarium subglutinans sensu lato on pine and mango." Thesis, 2002. http://hdl.handle.net/2263/29954.

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Fusarium subglutinans sensu lato is a complex of fungi, which are the causal agents of important diseases on a wide variety of plants. Two important diseases caused by F. subglutinans sensu lato are pitch canker and mango malformation. F. subglutinans sensu lato isolates causing pitch canker on pine trees have been described as a separate species, F. circinatum. whereas F. subglutinans sensu lato isolates associated with mango malformation have not been formally described. The objective of study was to clarify the taxonomy and population genetics of the pitch canker and mango malformation fung
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23

Ramsunder, Kumindra Devrajh. "Incidence and characterization of Fusarium species in crown rot of bananas." Thesis, 2002. http://hdl.handle.net/10321/2854.

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Submitted in partial fulfillment for the Degree of Master of Technology: Biotechnology, M. L. Sultan Technikon, 2002.<br>Fusarium species produce toxic mycotoxins that are known to exert adverse health effects in humans and animals. No attempts have been made to establish mycotoxin-producing capabilities of isolates of Fusarium species from bananas exhibiting symptoms of crown rot. Crown rot is one of the most serious post harvest problems in banana and the disease is caused by different fungal species, principally Fusarium species. Banana, which is of great economic significance in growing co
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24

Mkhize, Phumzile. "Development of an enzyme-linked immunosorbent assay (ELISA) for field detection and discrimination of Fusarium circinatum from Fusarium oxysporum and Diplodia pinea in pine seedlings." Thesis, 2013. http://hdl.handle.net/10413/11230.

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Fusarium circinatum is a fungal pathogen that has had a serious impact on pine production throughout the world. It attacks most Pinus species including Pinus elliottii, Pinus patula and Pinus radiata. Infections in South Africa (SA) are largely on seedlings, and result in fatal seedling wilt. Accurate and quick detection systems suitable for field use are needed to monitor the spread of the disease and optimize fungicide applications. Detection of F. circinatum is currently based on visual observations of typical symptoms. However, symptoms are not unique to the pathogen and can be caused by o
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25

Kidane, Eyob Gebrezgiabher. "Management of fusarium wilt diseases using non-pathogenic Fusarium oxysporum, and silicon and Trichoderma harzianum (ECO-T®)." Thesis, 2008. http://hdl.handle.net/10413/1225.

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In the genus Fusarium are many important plant pathogens. The diversity of hosts the genus attacks, the number of pathogenic taxa and the range of habitats in which they cause disease are the greatest in plant pathology. One important species complex within the genus Fusarium is Fusarium oxysporum Schlecht. This species complex consists more than 80 pathogenic forma specialis and is particularly difficult to control. The fungi can survive in soil for decades as specialized spores, known as chlamydospores. Interestingly, however, this species complex also contains beneficial non-pathogenic form
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26

Mahlanza, Tendekai. "In vitro generation of somaclonal variant plants of sugarcane (Saccharum spp. hybrids) for tolerance to toxins produced by Fusarium sacchari." Thesis, 2012. http://hdl.handle.net/10413/8497.

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The fungus Fusarium sacchari (Butler) Gams causes stem rot in sugarcane especially in association with the stem borer Eldana saccharina Walker. Sugarcane plants tolerant to F. sacchari PNG40 were obtained by chemical mutagenesis and in vitro selection during somatic embryogenesis and plantlet regeneration on media containing F. sacchari culture filtrates (CF), followed by selection in the greenhouse. Somaclonal variants tolerant to F. sacchari PNG40 CF were established by treatment of calli with ethyl methanesulphonate (EMS) and various selection treatments. Investigations were conducted to te
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27

Seepe, Hlabana Alfred. "Isolation and characterisation of antifungal compounds from medicinal plants that are active against selected fusarium species." Thesis, 2021. http://hdl.handle.net/10386/3353.

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Thesis (Ph.D. (Chemistry)) -- University of Limpopo, 2021<br>Fusarium species are among pathogenic organisms responsible for massive yield and quality losses in crop production. They cause crop diseases in the field and during storage, and some species are capable of producing mycotoxins which contaminate products and threaten consumer s’ health. Conventional synthetic fungicides are available for the control of Fusarium pathogens, however, their applications have been restricted or discouraged due to their harmful effect on the environment, livestocks and human health. There are also reports
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28

Bienapfl, John C. "Hop cone tip blight : a new disease in the Pacific Northwest." Thesis, 2003. http://hdl.handle.net/1957/32490.

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A necrosis at the tip of cones was observed on hop (Humulus lupulus), cultivar "Nugget", grown in Oregon in the early 1990's. Fusarium sambucinum and F. avenaceum were recovered from symptomatic cones in 1998 and preliminary inoculation experiments suggested both Fusarium species could cause hop cone necrosis. Studies were carried out to (1) examine pathogenicity and demonstrate Koch's postulates for hop cone tip blight using isolates of F. avenaceum and F. sambucinum obtained from hop cones; (2) examine isolates of F. avenaceum and F. sambucinum derived from other diseased plant hosts, and ot
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29

Venter, Eduard. "The molecular characterization of interaction between Fusarium circinatum and Pinus patula." Thesis, 2004. http://hdl.handle.net/2263/24544.

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The main objective of this thesis was the elucidation of the host-pathogen interaction between Pinus patula and Fusarium circinatum. This was accomplished by studying differential gene expression at the molecular level. Therefore, the first chapter reports the use of PCR-based methods in gene discovery and transcriptome analysis. The use of these techniques in the identification of novel transcripts in host-pathogen interactions addressed. These examples illustrate the differences and strong features of each technique. Chitinases are linked to defence responses in plants. In chapter tw0, the i
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30

Swett, Cassandra L. "Etiology and control of fusarial orchid diseases in Hawaii." Thesis, 2007. http://hdl.handle.net/10125/20922.

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31

Nkosi, Brightness Zama. "Characterisation of Fusarium oxysporum species complex associated with Fusarium wilt of sweet potato in South Africa." Diss., 2020. http://hdl.handle.net/10500/26613.

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Sweet potato is a popular food security crop in South Africa and has a considerable commercial value. Fusarium wilt (FW), caused by the fungal pathogen Fusarium oxysporum formae speciales (f. sp.) batatas, has been reported worldwide and is widespread in sweet potato production areas in South Africa. Preliminary molecular identification of South African isolates from diseased sweet potato plants indicated that there are other formae speciales besides F. oxysporum f. sp. batatas associated with FW. The objectives of the study were to conduct a field survey and to characterise the isolates of th
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32

Mugisha, Clare Mukankusi. "Improving resistance to Fusarium root rot [Fusarium solani (Mart.) Sacc. f. sp. phaseoli (Burkholder) W.C. Snyder & H.N. Hans] in common bean (Phaseolus vulgaris L.)." Thesis, 2008. http://hdl.handle.net/10413/208.

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Fusarium root rot (FRR) disease, caused by the fungus Fusarium solani f. sp. phaseoli (FSP), is an important soil-borne disease reducing common bean (Phaseolus vulgaris L.) yields, and hence food security, in Uganda and elsewhere in developing countries where the crop is grown without fungicides. The key aim of this study was to elucidate the significance of bean root rot (BRR), appraise methods for screening germplasm for resistance to FRR, determine the genotypic variability of resistance, and the inheritance of resistance to FRR in common bean. This information was deemed useful in devising
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33

Gerber, Johan 1961. "Yield response of Fusarium infected maize seed treated with biological control agent formulations." Diss., 2010. http://hdl.handle.net/10500/4713.

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Potential vegetative and reproductive increases in yield, as well as the biological efficacy against Fusarium verticillioides and F. proliferatum causing ear and stem rot in maize crops of commercially-formulated micro-organism formulation T-Gro (Trichoderma harzianum isolate DB103 WP) combined with Spartacus (Beauveria bassiana isolate DB 105 WP), T-Gro combined with Armenius (Bacillus subtilis isolate DB 109 WP), T-Gro combined with Maximus (Bacillus subtilis isolate DB 108 WP), T-Gro combined with Shelter (Bacillus subtilis isolate DB 101), T-Gro combined with Bismarck (Microbacterium marit
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34

Yang, Yalong. "Infection and mycotoxin production by Fusarium lactis, causal agent of internal fruit rot of sweet pepper." Master's thesis, 2009. http://hdl.handle.net/10048/605.

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Thesis (M. Sc.)--University of Alberta, 2009.<br>Title from PDF file main screen (viewed on Oct. 20, 2009). "A thesis submitted to the Faculty of Graduate Studies and Research in partial fulfillment of the requirements for the degree of Master of Science in Plant Science, Department of Agricultural, Food and Nutritional Science, University of Alberta." Includes bibliographical references.
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35

Hlokwe, Mapula Tshepo Pertunia. "The efficacy of mosonia burkeana, moringa oleifera and trichoderma harzianum on tomato soil-borne fungal pathogens fusarium oxysporum and rhizoctonia solani under in vitro and in vivo conditions." Thesis, 2018. http://hdl.handle.net/10386/2415.

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Thesis (M.Sc. (Agriculture)) --University of Limpopo, 2018<br>Tomato is second most cultivated crop globally and in South Africa it is planted by both commercial and smallholder farmers. However, the crop is susceptible to a number of diseases including those caused by fungal pathogens. Fusarium wilt caused by Fusarium oxysporum f. sp. lycopersici and seedling damping-off caused by Rhizoctonia solani, are known to cause serious yield loss in tomato production. Their management is mainly based on the application of synthetic fungicides and cultural practices. However, both methods have li
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36

Mweshi, Mukanga. "Genetic improvement of Zambian maize (Zea mays L.) populations for resistance to ear rots and a survey of associated mycotoxins." Thesis, 2009. http://hdl.handle.net/10413/519.

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Maize ear rots are among the most important impediments to increased maize production in Africa. Besides yield loss, they produce mycotoxins in their host whose contamination has been linked to several human and animal mycoses. The main objectives of the studies reported on in this thesis were (i) to investigate farmer perceptions of maize ear rot disease and prospects for breeding for host plant resistance in Zambia; and (ii) to establish the levels of incidence and extent of maize ear rot infection as well as the level of mycotoxins in the maize crops of smallholder farms in central and sout
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Mitchell, Richard Glen. "Factors affecting the successful deployment of Pinus patula as rooted cuttings." Thesis, 2005. http://hdl.handle.net/10413/4474.

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Summary: The future mass propagation of elite families of Pinus patula by cuttings is a realistic method of deployment if the short-term performance of cuttings and seedlings are confirmed at harvesting. This will impact significantly on the future outlook of forestry in South Africa as softwood yields are improved substantially through the introduction of material of high genetic value in commercial plantings. This, however, will require significant changes in future silviculture and other management practices as foresters and plantation staff learn to regenerate, maintain, and schedule the h
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