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Dissertations / Theses on the topic 'Plant root pathogens'

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Published: 18 May 2024

Last updated: 31 July 2025

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1

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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2

Ghosh, Anasooya. "Studies on soil –inhabiting siderophore producing bacteria and their role in suppression of plant root pathogens." Thesis, University of North Bengal, 2012. http://hdl.handle.net/123456789/1541.

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3

Matheron, Michael E., Kevin M. Crosby, and Martin Porchas. "Interaction of Pepper Experimental Lines with Phytophthora Crown and Root Rot in 2000." College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 2001. http://hdl.handle.net/10150/214919.

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This study was conducted in the greenhouse at the Yuma Agricultural Center. Thirty-nine experimental lines of pepper from the Texas A&M pepper breeding collection were seeded and grown in the greenhouse in 8 fl. oz. plastic pots. When plants were 2 months old (Aug 8), the potting mix in each pot was infested with Phytophthora capsici. Plants were placed in 2-in. deep containers filled with water for 48 hr every 2 weeks, which maintained the potting mix in a saturated condition and encouraged disease development. The mean temperature of the potting mix from the time it was infested with Phytoph

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4

Matheron, Michael E., and Martin Porchas. "Activity of Actigard® on Development of Phytophthora Root and Crown Rot on Pepper Plants." College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 2002. http://hdl.handle.net/10150/214945.

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Phytophthora blight of peppers (Capsicum annuum), caused by the oomycete pathogen Phytophthora capsici, occurs in most regions where this crop is grown. The root and crown rot phase of the disease develops on plants in areas of the field where soil remains saturated with water after an irrigation or rainfall. Subsequent periods of soil saturation encourage further disease development. Actigard (acibenzolar-S-methyl), is a chemical activator of plant disease resistance, has no known direct antifungal effects and is thought to mimic salicylic acid in the signal transduction pathway that leads to

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5

Nischwitz, C., Mary Olsen, and S. Rasmussen. "Influence of Salinity and Root-knot Nematode as Stress Factors in Charcoal Rot of Melon." College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 2002. http://hdl.handle.net/10150/214946.

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Incidence of Charcoal rot, caused by the soil borne fungus Macrophomina phaseolina, may be increased in some crops by the addition of stress on the host caused by high salinity of soil or irrigation water and infection by plant pathogenic nematodes. Since both of these factors may be problematic in melon production in Arizona, studies were initiated to determine if higher salt concentrations of irrigation water and infection by Root-knot nematode (Meloidogyne incognita) may be involved in recent increased incidences of Charcoal rot of melon. In greenhouse trials, higher concentrations of salts

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6

Levenfors, Jens. "Soil-borne pathogens in intensive legume cropping - Aphanomyces spp. and root rots /." Uppsala : Dept. of Plant Pathology and Biocontrol Unit, Swedish Univ. of Agricultural Sciences, 2003. http://epsilon.slu.se/a393.pdf.

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7

Olsen, M., M. McClure, and S. Husman. "Effect of Preplant Fumigation on Yield of Chile Pepper Infected with Root-Knot Nematode." College of Agriculture, University of Arizona (Tucson, AZ), 2000. http://hdl.handle.net/10150/220003.

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A field test was established in 1999 to determine the effect of preplant soil fumigation on yield of chile pepper in southeastern Arizona in order to give growers data on which to base management decisions. Replicated plots within a nematode-infested field planted with New Mex 6-4 chile in March 1999 were either treated with Telone II fumigant at 7 gal/A two weeks before planting or not treated. In a mid-season assay in July 1999, the effects of fumigation were evident in plant canopy growth although numbers of J2/cc soil were not significant between treatments (p=0.058). Differences in yields

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8

Matheron, Michael E., and Martin Porchas. "Comparative Effect of Five Fungicides on the Development of Root and Stem Rot and Survival of Chile Pepper Plants Grown in Field Soil Naturally Infested with Phytophthora capsici." College of Agriculture, University of Arizona (Tucson, AZ), 2000. http://hdl.handle.net/10150/220000.

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Five different fungicides, including azoxystrobin, dimethomorph, fluazinam, fosetyl-Al, and mefenozem (metalaxyl), were evaluated for their ability to inhibit the development of root and crown rot and increase the survival of chile pepper plants grown in soil naturally infested with Phytophthora capsici. For chile pepper plants grown in field soil naturally infested with P. capsici and subjected to a 48 h flood period every 2 weeks, growth and survival of plants receiving one treatment of dimethomorph at 100 μg/ml or fluazinam at 1,000 μg/ml were significantly greater than that for plants trea

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9

Sanabria, Andres SANABRIA. "EFFECTS OF ANAEROBIC SOIL DISINFESTATION COMBINED WITH BIOLOGICAL CONTROL ON ROOT-KNOT NEMATODE AND LETTUCE DROP." The Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu1534496965018979.

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10

Martin, Dana. "Investigation of the Biocontrol Activity in vitro and in planta of Different Pseudomonas Species Against Important Crown, Stem, Foliar and Root Pathogens of Ornamental Crops." The Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu1503063395390704.

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11

AZEVEDO, Thamara de Medeiros. "Expressão quantitativa de genes de Phytophthora parasitica e de citros durante a interação." Universidade Federal de Campina Grande, 2016. http://dspace.sti.ufcg.edu.br:8080/jspui/handle/riufcg/1151.

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Submitted by Rosana Amâncio (rosana.amancio@ufcg.edu.br) on 2018-07-11T20:50:26Z No. of bitstreams: 1 Dissertação Thamara - Capa Dura.pdf: 2260125 bytes, checksum: 530ae87f1e4a9200aafe1cb3102cff39 (MD5)<br>Made available in DSpace on 2018-07-11T20:50:26Z (GMT). No. of bitstreams: 1 Dissertação Thamara - Capa Dura.pdf: 2260125 bytes, checksum: 530ae87f1e4a9200aafe1cb3102cff39 (MD5) Previous issue date: 2016-08-19<br>CNPq<br>A gomose, provocada principalmente pelo oomiceto Phytophthora parasitica, é uma das mais graves doenças que acometem culturas de citros no âmbito mundial. Durante a intera

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12

Sheridan, Grainne E. C. "Molecular studies of watercress phylogeny and the crook-root pathogen." Thesis, University of Bath, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.338381.

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13

Matheron, Michael E., and Martin Porchas. "Efficacy of New Fungicides as Potential Management Tools for Phytophthora Crown and Root Rot on Pepper Plants." College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 2008. http://hdl.handle.net/10150/215006.

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Phytophthora blight of peppers (Capsicum annuum) is caused by the oomycete pathogen Phytophthora capsici. In Arizona, the root and crown rot phase of the disease initially can appear on plants early in the growing season in areas of the field where soil remains saturated with water after an irrigation or rainfall event. Disease severity can increase dramatically due to summer rains during July and August in the southeastern Arizona production area. Fungicides are an important component of a Phytophthora disease management system, when used in combination with other management practices such as

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14

Grimme, Eva. "Mycofumigation with Muscodor albus effects on Verticillium wilt and black dot root rot of potato, effects on Glomus intraradices and ectomycorrhizal fungi, and M. albus proliferation in soil /." Thesis, Montana State University, 2008. http://etd.lib.montana.edu/etd/2008/grimme/GrimmeE1208.pdf.

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Muscodor albus Worapong, Strobel & Hess, isolate CZ-620 (MA) is an endophytic fungus that produces volatile organic compounds (VOCs) and non-volatile antimicrobial compounds. The use of these VOCs to inhibit or kill a wide range of microorganisms is termed mycofumigation. This dissertation focuses on parameters of MA mycofumigation including: production and bioactivity of previously un-described water-soluble antimicrobial compounds produced by MA; distribution of antimicrobial compounds from a MA point source in three soil types as measured by effects on Verticillium dahliae and Colletotrichu

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15

Turnbull, Gillian Anne. "The role of motility in Pseudomonas fluorescens and Pseudomonas putida in soil-plant-microbe interactions." Thesis, University of Liverpool, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.367105.

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16

Sjöberg, Johanna. "Arbuscular mycorrhizal fungi : occurrence in Sweden and interaction with a plant pathogenic fungus in barley /." Uppsala : Dept. of Crop Production Ecology, Swedish University of Agricultural Sciences, 2005. http://epsilon.slu.se/200533.pdf.

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17

Yang, Zhenbiao. "Gene regulation in a pathogen-plant interaction: soft rot erwinias versus potato tubers." Diss., Virginia Tech, 1990. http://hdl.handle.net/10919/39693.

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Erwinia soft rot is a widespread disease destructive to numerous important crop plants. Damage to plants is primarily due to celldegrading enzymes (CDEs) secreted by the bacteria. I am interested in potato (Solanum tuberosum) soft rot because it is of agricultural importance and it represents an ideal model system for understanding molecular events in plant-pathogen interactions. Much has been learned in vitro about the molecular genetics of CDEs in the past decade; however, little is known about their expression in plantae To study expression of genes for these enzymes during pathogen

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18

Das, Lopamudra. "Studies on tea seed mycoflora and resistance of young tea plants against Rhizoctonia solani, a soil born root pathogen of germinating tea seedlings." Thesis, University of North Bengal, 2013. http://hdl.handle.net/123456789/1539.

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19

Taheri, Abdolhossein. "Interaction between root lesion nematode, Pratylenchus neglectus, and root-rotting fungi of wheat." Title page, contents and summary only, 1996. http://web4.library.adelaide.edu.au/theses/09PH/09pht128.pdf.

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Bibliography: leaves 307-329. This study concludes that in soils in South Australia where root-rotting fungi and P. neglectus exist together, root disease of wheat is caused by their combined effect. Evidence suggests that P. neglectus not only contributes to this interaction through mechanical wounding of roots, but also causes biochemical and physiological changes in plants, making them more prone to fungal infection.

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20

Ghazala, Al-Sadek Mohammed Salem. "Proteomic responses of uninfected tissues of pea plants infected by root-knot nematode, Fusarium and downy mildew pathogens." Thesis, University of the West of England, Bristol, 2012. http://eprints.uwe.ac.uk/18313/.

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Peas suffer from several diseases, and there is a need for accurate, rapid in-field diagnosis. This study used proteomics to investigate the response of pea plants to infection by the root knot nematode Meloidogyne hapla, the root rot fungus Fusarium solani and the downy mildew oomycete Peronospora viciae, and to identify potential biomarkers for diagnostic kits. A key step was to develop suitable protein extraction methods. For roots, the Amey method (Chuisseu Wandji et al., 2007), was chosen as the best method. The protein content of roots from plants with shoot infections by P. viciae was l

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21

Hutchins, John David. "Antagonism of the stem rot pathogen (Sclerotina sclerotiorum) by microorganisms from oilseed rape flowers : prospects for biological control." Thesis, Imperial College London, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.281747.

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22

Matheron, Michael E., and Martin Porchas. "Evaluation of Fungicides as Potential Management Tools for Phytophthora Crown Rot on Pepper Plants." College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 2006. http://hdl.handle.net/10150/215030.

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Phytophthora blight of peppers (Capsicum annuum) is caused by the oomycete pathogen Phytophthora capsici. In Arizona, the root and crown rot phase of the disease initially can appear on plants early in the growing season in areas of the field where soil remains saturated with water after an irrigation or rainfall event. Disease severity can increase dramatically due to summer rains during July and August in the southeastern Arizona production area. The efficacy of the systemic fungicide mefenoxam (Ridomil Gold)) for control of Phytophthora blight on pepper has been documented; however, in many

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23

Wicks, T. J. "Phytophthora crown rot of almond and cherry trees : pathogens, rootstock and scion susceptib[i]lity and control /." Title page, table of contents and summary only, 1987. http://web4.library.adelaide.edu.au/theses/09PH/09phw637.pdf.

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24

Huh, Jung-Hyun. "Biochemical, Molecular and Functional Analysis of Volatile Terpene Formation in Arabidopsis Roots." Diss., Virginia Tech, 2011. http://hdl.handle.net/10919/77151.

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Plants produce secondary (or specialized) metabolites to respond to a variety of environmental changes and threats. Especially, volatile compounds released by plants facilitate short and long distance interaction with both beneficial and harmful organisms. Comparatively little is known about the organization and role of specialized metabolism in root tissues. In this study, we have investigated the root-specific formation and function of volatile terpenes in the model plant Arabidopsis. As one objective, we have characterized the two root-specific terpene synthases, TPS22 and TPS25. Both en

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25

Southwood, Michael J. "Evolution and detection of Fusarium oxysporum f. sp. cepae in onion in South Africa." Thesis, Stellenbosch : Stellenbosch University, 2010. http://hdl.handle.net/10019.1/4499.

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Thesis (PhDAgric (Plant Pathology))--Stellenbosch University, 2010.<br>ENGLISH ABSTRACT: In the Western Cape onion industry in South Africa, Fusarium oxysporum Schlechtend.:Fr. f.sp. cepae (H.N. Hans.) W.C. Snyder & H.N. Hans. (Focep) has been identified as the leading cause of harvest and storage losses. This pathogen is of world-wide importance and causes Fusarium basal rot of onions (Allium cepa), affecting all onion growth stages. No information is available on the evolution, genetic diversity, molecular detection and inoculum sources of the South African Focep population. Similar t

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26

Van, Coller Gerhardus J. (Gerhardus Johannes). "An investigation of soilborne fungi associated with roots and crowns of nursery grapevines." Thesis, Stellenbosch : Stellenbosch University, 2004. http://hdl.handle.net/10019.1/49844.

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Thesis (MScAgric)--University of Stellenbosch, 2004.<br>ENGLISH ABSTRACT: Soilborne diseases of grapevines represent a complex problem with limited information available, both locally and internationally. Previous research in South Africa indicated that Phytophthora and Pythium spp. were the most widespread and devastating pathogens in grapevine nurseries and vineyards in the Western Cape province. The local grapevine industry is currently expanding; new cultivars, methods and agricultural chemicals are being used which can affect soilborne pathogens. It has therefore become necessary to

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27

Björkman, Maria. "Effects of intercropping on the life cycle of the turnip root fly (Delia floralis) : behaviour, natural enemies and host plant quality /." Uppsala : Dept. of Crop Production Ecology, Swedish University of Agricultural Sciences, 2007. http://epsilon.slu.se/2007125.pdf.

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28

Jung, M. C. Victoria. "The role of selected plant and microbial metabolites in the nutrient solution of closed growing systems in greenhouses /." Alnarp : Swedish University of Agricultural Sciences, 2003. http://diss-epsilon.slu.se/archive/00000343/.

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Thesis (doctoral)--Swedish University of Agricultural Sciences, 2003.<br>Appendix consists of reprints and manuscripts of five papers co-authored with others. Includes bibliographical references. Also partially available online in PDF format; online version lacks appendix.

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29

Andrade, Linares Diana Rocío. "Characterization of tomato root-endophytic fungi and analysis of their effects on plant development, on fruit yield and quality and on interaction with the pathogen Verticillium dahliae." Phd thesis, Universität Potsdam, 2011. http://opus.kobv.de/ubp/volltexte/2011/5137/.

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Non-mycorrhizal fungal endophytes are able to colonize internally roots without causing visible disease symptoms establishing neutral or mutualistic associations with plants. These fungi known as non-clavicipitaceous endophytes have a broad host range of monocot and eudicot plants and are highly diverse. Some of them promote plant growth and confer increased abiotic-stress tolerance and disease resistance. According to such possible effects on host plants, it was aimed to isolate and to characterize native fungal root endophytes from tomato (Lycopersicon esculentum Mill.) and to analyze their

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30

Musungu, Bryan Manyasi. "THE HOST-PATHOGEN INTERACTOME AND REGULATORY NETWORKS OF ASPERGILLUS FLAVUS PATHOGENESSIS OF ZEA MAYS: RESISTANCE IN MAIZE TO ASPERGILLUS EAR ROT AND TO AFLATOXIN ACCUMULATION." OpenSIUC, 2016. https://opensiuc.lib.siu.edu/dissertations/1212.

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The relationship between a pathogen and its host is a complex series of events that occurs at the molecular level and is controlled by transcriptional and protein interactions. To facilitate the understanding of these mechanisms in Aspergillus flavus and Zea mays, three approaches were taken: 1) the development of a predicted interactome for Z. mays (PiZeaM), 2) the development of co-expression networks for Z. mays and A. flavus from RNA-seq data, and 3) the development of causal inference networks depicting interactions between the host and the pathogen. PiZeaM is the genome-wide roadma

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31

Winslow, Jonathan W. "Evaluation of Host Resistance and the Utilization of Organic Amendments to Manage Macrophomina Crown Rot of Strawberry in California." DigitalCommons@CalPoly, 2019. https://digitalcommons.calpoly.edu/theses/2075.

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The production of strawberries can be severely limited by soilborne plant pathogens, insects and weeds. Macrophomina phaseolina is a problematic soilborne fungal pathogen in California strawberry production inciting the disease Macrophomina crown rot. When established, the pathogen can cause extensive plant decline and mortality. Host resistance will be a critical tool for managing this disease and guiding breeding programs in the post methyl bromide era. Evaluation of host resistance in strawberry germplasm to M. phaseolina was evaluated through phenotypic assessments of disease incidence. A

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32

Muppa, Saritha. "Molecular detection of pathogenic Fusarium species in roots and stalks of maize plants with or without transgenic resistance to corn rootworm." [Ames, Iowa : Iowa State University], 2009. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:1473237.

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33

Nauth, Brittany J. "Soybean QTL Mapping and Candidate Gene Identification for Pythium irregulare and Phytophthora sojae Partial Resistance; and Root-Knot Nematode Induced Suppression of Gene Silencing." The Ohio State University, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=osu1406151869.

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34

Ramirez-Suero, Montserrat. "Etude de l'interaction de Medicago truncatula avec Fusarium oxysporum et du rôle de l'acide salicylique dans les interactions de la plante avec différents agents pathogènes et symbiotiques." Thesis, Toulouse, INPT, 2009. http://www.theses.fr/2009INPT015A/document.

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Des études de l'interaction de la plante modèle des légumineuses Medicago truncatula avec des microorganismes pathogènes et symbiotiques ont été réalisées. Tout d'abord un pathosystème fongique a été caractérisé: M. truncatula en interaction avec Fusarium oxysporum spp., champignon responsable des fusarioses, soit du flétrissement vasculaire ou de la pourriture racinaire chez de nombreuses plantes cultivées. Deux lignées de M. truncatula: A17 et F83005.5 ont été identifiées comme sensible et tolérante respectivement à F. oxysporum f.sp. medicaginis, la forma specialis attribuée à la luzerne. D

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Golanowska, Malgorzata. "Characterization of Dickeya solani strains and identification of bacterial and plant signals involved in induction of virulence." Thesis, Lyon, INSA, 2015. http://www.theses.fr/2015ISAL0087/document.

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Les bactéries pectinolytiques des genres Pectobacterium (ancien nom Erwinia carotovora) et Dickeya (ancien nom Erwinia chrysanthemi) sont les agents des maladies de la jambe noire et de la pourriture molle. Ils provoquent des dommages aux cultures et des pertes économiques élevées. Les pertes causées par les bactéries pectinolytiques sont évaluées à environ 2 à 10% du rendement de pommes de terre, en fonction de l'année. En 2009, les pertes en pommes de terre en Europe ont été estimées à 250 millions d'euros. Au cours des dernières années, des souches de Dickeya ont été de plus en plus souvent

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Dore, Dalin Shelley. "Grapevine rhizosphere bacteria : influence of diversity and function on two root diseases : a thesis submitted in fulfilment of the requirements for the degree of Master of Science at Lincoln University /." Diss., Lincoln University, 2009. http://hdl.handle.net/10182/1305.

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The overall goal of this research was to determine what, if any, role grapevine rhizosphere bacteria play in the differing susceptibilities of New Zealand grown rootstocks to Cylindrocarpon black foot disease. The size and diversity of bacterial populations associated with the rhizospheres of grapevine rootstocks: 101-14, 5C, Schwarzmann and Riparia Gloire were evaluated. Dilution plating showed that total bacterial (P=0.012, P=0.005 for NA and KB, respectively) and fluorescent Pseudomonad (P=0.035) rhizosphere counts differed between rhizosphere and bulk soils but did not correlate with the d

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Patil, Neeraj. "Detection of Sclerotinia sclerotiorum using qPCR assay and comparison between three qPCR systems to check sensitivity." Thesis, Högskolan i Skövde, Institutionen för biovetenskap, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:his:diva-20265.

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Sclerotinia sclerotiorum is a pathogenic fungus that infects around 400 species of host plants. Stem rot disease caused by this fungus is economically disastrous for Brassica napus cultivators in Sweden. Due to the lack of disease resistant cultivars, disease management has been solely dependent on fungicide application. The current disease prediction models are not scientifically accurate and take into account factors such as weather, previous disease incidence, and conomic effects which often result in unnecessary and excessive use of fungicides by cultivators. Real-Time Polymerase Cha

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Sobrinho, Candido Athayde. "Patossistema caupi X Macrophomina phaseolina: método de detecção em sementes, esporulação e controle do patógeno." Universidade de São Paulo, 2005. http://www.teses.usp.br/teses/disponiveis/11/11135/tde-29042005-161211/.

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Apesar da espécie Vigna unguiculata (L.) Walp. ser bastante rústica e estar adaptada às condições adversas de clima e solo brasileiros, seu rendimento é muito baixo. Diversas causas têm sido levantadas para explicar esse comportamento; entre elas destacam-se as doenças fúngicas, sobretudo aquelas cujos patógenos são transmitidos por sementes, em especial a podridão cinzenta do caule, causada por Macrophomina phaseolina (Tassi) Goid. A abordagem analítica desse patossistema revelou alguns problemas emergentes. Entre eles, destacam-se: a) desconhecimento da qualidade sanitária das sement

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Abraham, Abraha Okbasillasie. "Biological control of Phytophthora root rot of citrus seedlings and cuttings." Thesis, 2005. http://hdl.handle.net/10413/3830.

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With an increasing realization that many agrochemicals are hazardous to animals and humans, came the desire to replace these chemical agents with biological approaches that are more friendly to the environment and human health. Microorganisms play an important role in plant disease control, as naturally occurring antagonists. Microorganisms may also have beneficial effects on plant development when applied to plant roots. Research efforts worldwide have recorded successes in biological control and growth stimulation on many crops, particularly when using members of the genera Bacillus and Tri

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Ramputla, Mogwale Janet. "Nutritional water productivity of hot chilli (capsicum annuum) under infection with meloidogyne javanica and meloidogyne incognitarace 2." Thesis, 2019. http://hdl.handle.net/10386/3168.

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Thesis (M.Sc. Agriculture (Soil Science)) -- University of Limpopo, 2019<br>Nutritional water productivity (NWP) is an assessment tool, which describes the amount of water that has been used to produce selected mineral malnutrition (MMN) elements and micronutrient malnutrition (MNMN) substances. Therefore, it links agricultural production to human nutrition. Deficiencies in MMN elements and/or MNMN substances in human nutrition referred to as malnutrition, had been linked with fatal diseases. Agricultural soils could be affected by soil-borne pathogens such as plant-parasitic nemat

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"Association of chickpea with soil fungi: a comparison of cultivars." Thesis, 2014. http://hdl.handle.net/10388/ETD-2014-11-1848.

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Certain crop plants are susceptible to pathogens or unable to develop efficient microbial symbioses. These crops adversely impact soil biological quality with consequences on plant health and productivity of cropping systems. Chickpea is a rotational pulse crop with two types: kabuli and desi, and several cultivars. Cultivation of chickpea has inconsistent effects on soil microbial communities and subsequent wheat crops. I conducted field studies and used high throughput molecular analyses to explore the variations among chickpeas to identify cultivars developing fungal communities that are co

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(9828155), Top Pun. "Computer visualisation for microscopic discernment and counting of plant-parasitic nematodes." Thesis, 2024. https://figshare.com/articles/thesis/Computer_visualisation_for_microscopic_discernment_and_counting_of_plant-parasitic_nematodes/29147576.

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Plant-parasitic nematodes are invasive pathogens that cause severe damage to crops. To minimise the infestation of plant-parasitic nematodes, appropriate identification techniques and accurate population estimation of plant-parasitic nematodes are necessary to employ optimal control strategies. Conventionally, nematodes are identified using a manual microscope, and their morphological features are investigated to discern nematode species and count their population in the sample. However, this process is laborious and time consuming with the increasing number of samples. Although several nemato

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(12298370), Alison S. Jensen. "Redefining pachymetra root rot management strategies and cultivar resistance in commercial sugarcane fields." Thesis, 2020. https://figshare.com/articles/thesis/Redefining_pachymetra_root_rot_management_strategies_and_cultivar_resistance_in_commercial_sugarcane_fields/19426862.

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Pachymetra chaunorhiza is an important soilborne pathogen of sugarcane and is found only in Australia. Pachymetra root rot is managed primarily by growing resistant cultivars, which are chosen for planting based on oospore levels in the soil. This management strategy does not account for differences in virulence among Pachymetra populations, despite previous research demonstrating that two genetically distinct groups of Pachymetra occur, which may differ in pathogenicity. Higher than expected yield losses have been associated with high oospore levels under some cultivars with intermediate resi

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Mackey, Melora. "Resistance to Verticillium in Tomatoes: the Root-Stem Controversy." Thesis, 2013. http://hdl.handle.net/10214/7749.

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Verticillium is a soil-borne fungus that is one of the world's foremost plant pathogens. Commercial plant grafting suggests that resistance occurs in the root; this conflicts with decades of research indicating that resistance occurs in the stem. The goal of this thesis work was to use an alternative approach to determine the location of resistance by expressing the Ve1 gene using organ-specific promoters. Promoter sequences for the stem-specific gene, Ribulose 1,5-bisphosphate carboxylase oxygenase small chain 2A (Rbsc2A), and root-specific gene, Tobacco Mosaic Virus Induced (TMVi) were ta

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Hsiao, Yun-Hsuan, and 蕭韻軒. "Development of simple differential and disease diagnosis assays for plant soft rot pathogen, Pectobacterium chrysanthemi." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/81100298821863514878.

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碩士<br>輔仁大學<br>生命科學系碩士班<br>103<br>The first purpose of this study is to test the feasibility of the 3XPGMA strip paper and two differential media, NGM and NGCa, for the diagnosis of orchid soft rot diseases caused by Pectobacterium chrysanthemi (Pch) or Burkholderia gladioli (Bgla) and for the detection of Pch or Bgla on the leaf surface of orchids. In the disease diagnosis, the diseased tissues caused by Pch or Bgla were first wiped by a wet cotton swab, and the swab was then put into a plastic tube containing 3XPGMA strip paper. The swab wiped on soft rot tissues caused by Pch turned the pape

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Wicks, T. J. (Trevor J. ). "Phytophthora crown rot of almond and cherry trees : pathogens, rootstock and scion susceptib[i]lity and control." 1987. http://web4.library.adelaide.edu.au/theses/09PH/09phw637.pdf.

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Wicks, T. J. (Trevor J. ). "Phytophthora crown rot of almond and cherry trees : pathogens, rootstock and scion susceptibility and control / T.J. Wicks." 1987. http://hdl.handle.net/2440/21591.

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Bibliography: leaves 169-185<br>viii, 185 leaves, [1] leaf of plates : ill. (some col.) ; 30 cm.<br>Title page, contents and abstract only. The complete thesis in print form is available from the University Library.<br>Thesis (Ph.D.)--University of Adelaide, Dept. of Plant Pathology, 1987

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Wanthaya, Somprathana, and 王姍姍. "Antifungal Activities of Medicinal Plants Extract for Controlling Crown Rot Pathogens on ‘Pei-Chiao’ Banana (Musa spp., Giant Cavendish, AAA Group)." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/26184126697885677872.

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碩士<br>國立中興大學<br>園藝學系所<br>103<br>Banana (Musa spp.) is a commercially important fruit crop of world. However, its short shelf life and suffers severe postharvest losses seriously limit the marketing of the fruits. Fungal disease, maning crown rot is a serious problem in banana. Fungicides are the primary means for controlling fungal diseases. However, many consumers prefer chemical free banana for their taste and pesticide free status. Medicinal plants are alternative methods that can control fungal disease, because a range of biological activities had been found in plant extracts including wou

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Andrade, Linares Diana Rocío [Verfasser]. "Characterization of tomato root-endophytic fungi and analysis of their effects on plant development, on fruit yield and quality and on interaction with the pathogen Verticillium dahliae / von Diana Rocío Andrade Linares." 2010. http://d-nb.info/1014227321/34.

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