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Dissertations / Theses on the topic 'Suppressive soils'

Author: Grafiati

Published: 4 June 2021

Last updated: 20 February 2023

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1

Ghahremani, Zahra. "Biological control approaches of Meloidogyne spp. in vegetable crops : from application of selected antagonists to suppressive soils." Doctoral thesis, Universitat Politècnica de Catalunya, 2020. http://hdl.handle.net/10803/673047.

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Root-knot nematodes (RKN), Meloidogyne spp., are the most economically important genus of plant parasitic nematodes that cause considerable damage and yield losses of horticultural crops worldwide. RKN management strategies tend to reduce chemical nematicides by encouraging alternative control methods like the use of plants bearing resistance genes (R-genes) and/or by microbe-inducing plant resistance, and the antagonistic potential of soils. In the thesis, two biological control approaches of Meloidogyne spp. were evaluated: 1) the application of selected nematode antagonists, the fungus Poch

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2

Almario, Juliana. "Relation entre la propriété phytoprotectrice de synthèse de 2,4-diacétylphloroglucinol par les Pseudomonas fluorescents dans la rhizosphère, et la résistance des sols à la maladie de la pourriture noire des racines de tabac." Thesis, Lyon 1, 2012. http://www.theses.fr/2012LYO10337/document.

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Les bactéries du sol produisant des antifongiques comme le 2,4-diacétylphloroglucinol(DAPG) protègent les racines des plantes vis-à-vis des champignons phytopathogènes. Néanmoins, les conditions de fonctionnement de ces populations bactériennes dans le sol restent très mal connues. Dans certains sols, dits résistants aux maladies, ces bactéries phytoprotectrices sont présentes à des effectifs importants et leur activité est suffisante pour protéger la plante malgré la présence du pathogène. L'objectif de cette thèse a été de comprendre la relation entre la résistance des sols à la maladie de l

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3

Trejo, Sypolt Emily. "The Impacts of Soil Degradation on Plant Pest Suppression in Cities." The Ohio State University, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=osu1574779121415878.

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4

Meagher, Patricia. "The influence of peat and peat-substitute potting mix components on disease suppression, with particular reference to changes with time." Electronic version, 2008. http://epress.lib.uts.edu.au/dspace/handle/2100/553.

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5

Chng, Soon Fang. "Microbial factors associated with the natural suppression of take-all in wheat in New Zealand : a thesis submitted in partial fulfilment of the requirements for the degree of Doctor of Philosophy at Lincoln University, Canterbury, New Zealand /." Diss., Lincoln University, 2009. http://hdl.handle.net/10182/863.

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Take-all, caused by the soilborne fungus, Gaeumannomyces graminis var. tritici (Ggt), is an important root disease of wheat that can be reduced by take-all decline (TAD) in successive wheat crops, due to general and/or specific suppression. A study of 112 New Zealand wheat soils in 2003 had shown that Ggt DNA concentrations (analysed using real-time PCR) increased with successive years of wheat crops (1-3 y) and generally reflected take-all severity in subsequent crops. However, some wheat soils with high Ggt DNA concentrations had low take-all, suggesting presence of TAD. This study investiga

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6

Osei, Kingsley. "Nematode suppression and soil improvements potential of some leguminous cover crops in Ghana." Thesis, University of Reading, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.494780.

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Leguminous cover crops are promising as Meloidogyne spp. suppressants but where populations of mixed species occur, their potential remains uncertain. When inoculated with a Meloidogyne arenaria-incognita-javanica complex in a glasshouse experiment, Mucuna pruriens and Crotalaria spectabilis, were poor or non-hosts, did not gall and plant height and shoot biomass were not affected. However, Dolichos lablab was highly susceptible. The root system of D. lablab stimulated population increase but the leaf eluant proved lethal. Thus, different parts of a plant contain different active ingredients o

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7

Nanayakkara, Chandrika Malkanthi Hewawasam. "Bacterial biocontrol and soil solarization strategies for suppression of Rhizoctonia solani on rice." Thesis, University of Aberdeen, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.424985.

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Use of known antagonists and antagonistic, endophytic bacteria was investigated to screen a successful antagonist for the fungal strains <i>R. solani</i> AG 2-1, <i>R. solani</i> AG 4 and <i>R. solani</i> AGSL01. Reputed antagonists used in the study; <i>Bacillus subtilis </i>MBI 205, <i>B. subtilis</i> MBI 600, <i>Pseudomonas fluorescens</i> B5 and <i>P. corrugate</i> R. 117 were capable of suppressing the fungus in dual cultures. Manipulation of soil factors to reduce pre-plant density of <i>R. solani</i> sclerotia involved a laboratory experiment followed by two field experiments. In th

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8

Efthymiadou, Aspasia. "Effect of environmental and soil factors on nitrogen release, weed suppression and yield of organically grown crops." Thesis, University of Reading, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.494958.

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The objective of this study was to evaluate the effect of various organic amendment on weed suppression, soil content and yield components of sweet com (Zea mays L.) grown under organic or sustainable agriculture regimes. Field experiments were conducted during 2004, 2005 and 2006 to study the effect poultry manure, cow manure and barley mulch, used at three rates (half, recommended. double). Sweet com ({Zea mays L.) was planted. Two experiments were conducted each year. Experiment I was in combination with nitrogen fertilization (nitrogen was added in each treatment according to the nitrogen

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9

Buck, Joshua R. "Plant-Soil Feedbacks and Subalpine Fir Facilitation in Aspen-Conifer Forests." BYU ScholarsArchive, 2012. https://scholarsarchive.byu.edu/etd/3397.

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This thesis includes two studies. The first study examined changes in soil characteristics as a result of prolonged conifer dominance in successional aspen-conifer forests. Changing disturbance patterns in aspen-conifer forests appear to be altering successional dynamics that favors conifer expansion in aspen forests. The primary objective of this paper was to identify how increasing conifer dominance that develops in later successional stages alters forest soil characteristics. Soil measurements were collected along a stand composition gradient: aspen dominated, aspen-conifer mix, conifer dom

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10

Hoagland, Lori A. "Impact of soil biology on nitrogen cycling and weed suppression under newly established organic orchard floor management systems." Online access for everyone, 2007. http://www.dissertations.wsu.edu/Dissertations/Spring2007/l_hoagland_041807.pdf.

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11

Lainà, Rosetta. "Some effects of air-filled porosity on the suppression of damping-off of seedlings by pythium ultimatum in compost amended potting media /." [Campbelltown, N.S.W. : The author], 1997. http://library.uws.edu.au/adt-NUWS/public/adt-NUWS20030709.141536/index.html.

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12

Fang, Lynn. "Biological Indicators Of Compost-Mediated Disease Suppression Against The Soilborne Plant Pathogen Rhizoctonia Solani." ScholarWorks @ UVM, 2015. http://scholarworks.uvm.edu/graddis/456.

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Compost can suppress soilborne plant pathogens that cause significant damage on globally important food crops. However, reports of plant pathogen suppression are inconsistent likely because there are no established standards for feedstock material, application rate, and maturity age upon application. Excellent results can be achieved in greenhouse trials, but field applications are much less reliable. Disease suppression occurs through the activity of biocontrol organisms (direct antagonism), and general microbial competition. Biocontrol species are hypothesized to colonize the pile during the

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13

Orellana, Vintimilla Diego Patricio. "Short-term Effect of Fertilization and the Long-term Effect of Soil Organic Management History and its Relationship to Above-ground Insect Suppression." The Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu1483699208567652.

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14

Zhang, Weizheng. "Disease suppression and systemic-acquired-resistance-induced in plants by compost-amended potting mixes, compost water extracts and no-tillage soil /." The Ohio State University, 1997. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487943610784806.

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15

Benitez, Maria Soledad. "Applied T-RFLP Analyses for the Identification and Characterization of Microbial Populations Associated With Damping-Off Incidence in a Transitional Organic Cropping System." The Ohio State University, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=osu1218471106.

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16

Eberlein, Caroline [Verfasser], Stefan [Akademischer Betreuer] Vidal, Johannes [Gutachter] Hallmann, and Andreas von [Gutachter] Tiedemann. "Influence of agronomic practices on the development of soil suppression against cyst-forming plant-parasitic nematodes / Caroline Eberlein ; Gutachter: Johannes Hallmann, Andreas von Tiedemann ; Betreuer: Stefan Vidal." Göttingen : Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2017. http://d-nb.info/1131875664/34.

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17

Liu, Lanfa, Min Ji, and Manfred Buchroithner. "A Case Study of the Forced Invariance Approach for Soil Salinity Estimation in Vegetation-Covered Terrain Using Airborne Hyperspectral Imagery." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2018. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-234978.

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Soil spectroscopy is a promising technique for soil analysis, and has been successfully utilized in the laboratory. When it comes to space, the presence of vegetation significantly affects the performance of imaging spectroscopy or hyperspectral imaging on the retrieval of topsoil properties. The Forced Invariance Approach has been proven able to effectively suppress the vegetation contribution to the mixed image pixel. It takes advantage of scene statistics and requires no specific a priori knowledge of the referenced spectra. However, the approach is still mainly limited to lithological mapp

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18

Madsen, Matthew D. "Influence of Soil Water Repellency on Post-fire Revegetation Success and Management Techniques to Improve Establishment of Desired Species." BYU ScholarsArchive, 2009. https://scholarsarchive.byu.edu/etd/1994.

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The influence of soil water repellency (WR) on vegetation recovery after a fire is poorly understood. This dissertation presents strategies to broaden opportunities for enhanced post-fire rangeland restoration and monitoring of burned piñon and juniper (P-J) woodlands by: 1) mapping the extent and severity of critical and subcritical WR, 2) determining the influence of WR on soil ecohydrologic properties and revegetation success, and 3) evaluating the suitability of a wetting agent composed of alkylpolyglycoside-ethylene oxide/propylene oxide block copolymers as a post-fire restoration tool fo

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19

Zhu, Hui-E., and 朱慧娥. "Studies on the soils suppressive to Rhizoctonia solani." Thesis, 1991. http://ndltd.ncl.edu.tw/handle/75619070271055567847.

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20

Keen, Bradley Paul, University of Western Sydney, College of Health and Science, and School of Natural Sciences. "Microbial ecology of phytophthora cinnamomi suppressive soils : a study of biological suppression of P. cinnamomi in sub-tropical avocado orchards on the east coast of Australia." 2006. http://handle.uws.edu.au:8081/1959.7/16038.

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This study focuses on the soil- and water-borne plant pathogen Phytophthora cinnamomi Rands and the phenomenon of P. cinnamomi suppressive soil. In particular, this thesis reports on the outcome of field surveys and glasshouse assays undertaken to locate P. cinnamomi suppressive soils and to confirm the involvement of biological processes in suppression. The potential role of cellulase and laminarinase in suppression was investigated and a molecular technique known as length heterogeneity PCR (LH-PCR) was used to analyse the structure and diversity of bacterial and fungal communities in avocad

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21

ZHENG, KE-DA, and 鄭可大. "Comparative studies on clubroot disease of crucifers in conducive and suppressive soils." Thesis, 1989. http://ndltd.ncl.edu.tw/handle/24835533541962988416.

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22

Keen, Bradley Paul. "Microbial ecology of phytophthora cinnamomi suppressive soils : a study of biological suppression of P. cinnamomi in sub-tropical avocado orchards on the east coast of Australia." Thesis, 2006. http://handle.uws.edu.au:8081/1959.7/16038.

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This study focuses on the soil- and water-borne plant pathogen Phytophthora cinnamomi Rands and the phenomenon of P. cinnamomi suppressive soil. In particular, this thesis reports on the outcome of field surveys and glasshouse assays undertaken to locate P. cinnamomi suppressive soils and to confirm the involvement of biological processes in suppression. The potential role of cellulase and laminarinase in suppression was investigated and a molecular technique known as length heterogeneity PCR (LH-PCR) was used to analyse the structure and diversity of bacterial and fungal communities in avocad

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23

Davey, Rowena Sjaan. "Soil-borne disease suppression to Rhizoctonia solani AG8 in agricultural soils from a semi-arid region in South Australia." Thesis, 2013. http://hdl.handle.net/2440/82376.

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Rhizoctonia solani AG8 is a significant soil-borne pathogen of cereal roots in semi-arid Mediterranean regions of Australia and the Pacific North West region in the United States of America, causing severe productivity and economic losses to farmers. During the past twenty years the conversion of many farming systems to conservation tillage has meant that the mycelial network of the pathogen is no longer seasonally disturbed by cultivation which has subsequently increased the potential for greater incidence of Rhizoctonia root rot. There has been some success in reducing incidence by using mod

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24

WANG, ZHAO-FEN, and 王肇芬. "The investigation of suppressive soil of clubroot of crucifers and its mechanism." Thesis, 1986. http://ndltd.ncl.edu.tw/handle/34619571224453929311.

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25

(9806690), Lily Ishak. "Soil microbial communities and disease suppression as affected by soil compaction resulting from different management strategies." Thesis, 2017. https://figshare.com/articles/thesis/Soil_microbial_communities_and_disease_suppression_as_affected_by_soil_compaction_resulting_from_different_management_strategies/13449452.

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This research has examined the effects of soil compaction, and common agricultural management strategies used to overcome soil compaction, on soil bacterial and fungal activity and diversity. Soil microbial communities, bacteria and fungi in particular, play essential roles in the maintenance of soil health, where high soil microbial diversity might strongly contribute to the natural disease suppression. The activity and diversity of soil microbial communities is, however, strongly dependent on other soil characteristics, especially soil physical parameters. Soil compaction indicated by increa

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26

Shen, Sheng-Chia, and 沈家昇. "Control of Fusarium Wilt of Cucumber by Using Nonpathogenic Fusarium oxysporum from a Suppressive Soil." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/60061358694197571272.

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碩士<br>國立中興大學<br>植物病理學系<br>89<br>This study was aimed at verifying the suppressiveness of soil collected from a cucumber cultivation field at Hualian, determining the suppressive factor(s), screening the beneficial nonpathogenic Fusarium oxysporum and bacterial antagonists, and their application on biological control the Fusarium wilt of cucumber caused by F. oxysporum f. sp. cucumerinum. Fusarium wilt is an important limiting factor of cucumber cultivation in Taiwan. Typical wilt symptoms in cucurbits, resulting in mortality are manifested in both young and mature plants and when infection occ

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27

Mahran, Amro. "Suppression of the root-lesion nematode using liquid hog manure." 2009. http://hdl.handle.net/1993/3157.

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Root-lesion nematodes, Pratylenchus spp., are serious pathogens of potato plants worldwide. Several management practices can control Pratylenchus spp.; however, they all have shown some limitations. Therefore, environmentally-safe, low-cost, and effective control strategies are needed as possible alternative to currently used strategies. This thesis was designed to assess if liquid hog manure (LHM) holds such potential. The objectives of this thesis were to determine: (i) the prevalence and identity of species of Pratylenchus spp. in Manitoba potato fields, (ii) if short-chain volatile fatty a

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28

Latz, Ellen. "Unravelling mechanisms linking plant diversity to plant-disease suppression." Doctoral thesis, 2015. http://hdl.handle.net/11858/00-1735-0000-0022-608E-7.

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29

Ku, Pei-Chi, and 辜珮琪. "Cement solidification and chemically modified activated carbon for suppression of mercury leaching from contaminated soil." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/23ap76.

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碩士<br>國立臺北科技大學<br>土木與防災研究所<br>100<br>Mercury is receiving a major focal among many of the heavy metals due to its unique characteristics, such as its high toxicity, volatility and ability to bioaccumulate. Mercury has been recognized as a toxic hazard for centuries. Both inorganic and organic mercury can cause serious health effects. Organic forms of mercury are generally more toxic than inorganic forms, but it is possible for inorganic mercury to be biologically transformed into organic mercury. Therefore, it is important to control inorganic mercury leaching from mercury containing wastes. I

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30

Eberlein, Caroline. "Influence of agronomic practices on the development of soil suppression against cyst-forming plant-parasitic nematodes." Thesis, 2016. http://hdl.handle.net/11858/00-1735-0000-0023-3E35-A.

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31

Rifai, Sami. "Fertilization and competing vegetation suppression in loblolly pine forests impacts on soil C, N, and microbial attributes /." 2008. http://purl.galileo.usg.edu/uga%5Fetd/rifai%5Fsami%5Fw%5F200812%5Fms.

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32

Yu, I.-Min, and 游以民. "Pile of vibration suppression and behavior of the attenuation of wave propagation around model pile in the soil." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/15850408852418448698.

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碩士<br>國立中央大學<br>土木工程研究所<br>93<br>Abstract Vibration caused by transportation vehicles pass through viaduct or bridge may be transmitted from piers to pile foundations. This vibration may generate waves in deep layer. The wave propagation from the bearing stratum may cause damages to the adjacent structures or high-tech production facilities. The purpose of this research is to investigate the wave propagation in soil layers and the method for reducing these vibrations. To reduce the vibration that may cause some detrimental effects to the residences, adjacent structures or high-tech production

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33

SIE, MENG-YUN, and 謝孟耘. "Investigation of soil microorganisms in organic tea garden and its application for suppression of anthracnose disease on chinese cabbage." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/3as86s.

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碩士<br>國立虎尾科技大學<br>生物科技系碩士在職專班<br>107<br>In order to cope with the possible shortage of food caused by the increase in population, all countries in the world are working hard to increase food production. However, how to achieve a balance between food production and environmental and ecological systems is the goal of national agricultural policy efforts, such as promoting organic agriculture is one of its policies. Biological control is recognized as one of the important means to replace or reduce chemical pesticide use in the future. Therefore, this thesis is conducted to isolate antagonistic m

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