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Dissertations / Theses on the topic 'Root rot'

Author: Grafiati

Published: 4 June 2021

Last updated: 26 July 2025

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1

Olsen, Mary. "Cotton (Texas) Root Rot." College of Agriculture, University of Arizona (Tucson, AZ), 2015. http://hdl.handle.net/10150/346609.

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Revised 02/2015; Originally published: 2000.<br>The most important disease of woody dicotyledonous plants in Arizona is Phymatotrichopsis root rot (Cotton or Texas root rot) caused by a unique and widely distributed soil-borne fungus, Phymatotrichopsis omnivora. The fungus is indigenous to the alkaline, low-organic matter soils of the southwestern United States and central and northern Mexico.

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2

Olsen, Mary W. "Cotton (Texas) Root Rot." College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 2009. http://hdl.handle.net/10150/144800.

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4 pp.<br>Cotton root rot commonly causes a sudden wilt and death of susceptible plants in summer months but may also cause a slow decline, especially at cooler temperatures. So, positive identification of disease by an experienced person is essential. This publication addresses the symptoms, environmental conditions, disease, prevention and control methods, sampling, identifying susceptible plants and the tolerant and immune plants of cotton root rot.

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3

Chambers, Susan M. "Phytophthora root rot of chestnut /." Title page, contents and abstract only, 1993. http://web4.library.adelaide.edu.au/theses/09PH/09phc4449.pdf.

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4

West, Jon. "Chemical control of Armillaria root rot." Thesis, University of Reading, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.386565.

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5

Kilby, Michael W. "Phymatotrichum (Cotton Root Rot) Resistant Grape Rootstocks." College of Agriculture, University of Arizona (Tucson, AZ), 1990. http://hdl.handle.net/10150/215735.

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6

Mahato, Tilak, Mary Olsen, and Ursula K. Schuch. "Controlling Rhizoctonia Root Rot in Bedding Plants." College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 2004. http://hdl.handle.net/10150/216551.

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Rhizoctonia root rot is caused by a soil borne fungus, Rhizoctonia solani and is a serious problem in bedding plants. The objective of this study was to determine the efficacy of three chemical and two biological products for controlling Rhizoctonia root rot in cool season and warm season bedding plants. Experiments were conducted with summer and winter bedding plants in a nursery production and landscape situation. The efficacy of conventional fungicides or biological products to control Rhizoctonia root rot in bedding plant production and simulated landscape growth cannot be evaluated from r

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7

Tyler, Ray, Edith DeRosa, Lee J. Clark, and Mary Olsen. "Seed Treatment to Prevent Black Root Rot." College of Agriculture, University of Arizona (Tucson, AZ), 1986. http://hdl.handle.net/10150/219773.

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The 1985 and 1986 Cotton Reports have the same publication and P-Series numbers.<br>NU-Zone (imazalil) + Nu-Flow ND (TCMTB + Chloroneb), NU-Flow ND, and Vitavax (carboxin) were evaluated as seed treatments with and without in-furrow PCNB. The following was learned: - Vitavax-treated seed got out of the ground faster than the other treatments, which brings out the possibility that NU-Flow or NU-Zone slows germination. - Stands and root development were slightly better when NUZone was present. - NU-Zone + NU-Flow ND seed treatment is not totally effective in controlling black root rot in heavily

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8

Persson, Lars. "Soil suppressiveness to Aphanomyces root rot of pea /." Uppsala : Swedish Univ. of Agricultural Sciences (Sveriges lantbruksuniv.), 1998. http://epsilon.slu.se/avh/1998/91-576-5472-7.gif.

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9

Xia-Hong, He. "Bio-control of root rot disease in vanilla." Thesis, University of Wolverhampton, 2007. http://hdl.handle.net/2436/15398.

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Fusarium oxysporum Schl. var. vanillae (Tucker) Gondon is known to cause root rot in Vanilla planifolia Andrews in most regions where it is grown, including the major plantations in Xishuangbanna, Yunnan Province of China. This is of serious economic concern to the Province since the vanilla flavouring extractable from the beans of the plant is a valuable food product and an important export commodity. There are no fungicides registered for the control of Fusarium root rot and the only available chemical control methods are ineffective and cause serious contamination of the soil. Breeding for

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10

Das, Jyotsna. "Serological detection of sphaerostible repens B. and Br. causing violet root rot disease of tea and its management." Thesis, University of North Bengal, 2002. http://hdl.handle.net/123456789/915.

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11

Omar, Ibrahim. "Biological control of crown and root rot of tomato." Thesis, University of Nottingham, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.310952.

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12

Beligala, Gayathri. "Screening for Resistance to Phytophthora Root Rot in Lupin." Bowling Green State University / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1467244910.

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13

Hine, Dick, Roy Whitson, Jim Armstrong, Don Howell, and Ron Cluff. "Fungicide Evaluations for the Control of Phymatotrichum Root Rot." College of Agriculture, University of Arizona (Tucson, AZ), 1985. http://hdl.handle.net/10150/204052.

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14

Chowdhury, Prabir Roy. "Exploitation of Rhizosphere microorganisms of tea for protection against root rot pathogens." Thesis, University of North Bengal, 2008. http://hdl.handle.net/123456789/1063.

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15

Meyer, Jack Robert. "Cultivar susceptibility and fungicide control of black dot root rot." Thesis, Montana State University, 2007. http://etd.lib.montana.edu/etd/2007/meyer/MeyerJ0507.pdf.

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16

Linde, Alec Robert 1956. "Root rot of hydroponically grown lettuce caused by Phytophthora cryptogea." Thesis, The University of Arizona, 1991. http://hdl.handle.net/10150/277895.

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In April 1989, lettuce (Lactuca sativa L.) plants showing severe root rot symptoms were received for diagnosis from a commercial hydroponic facility in Southern California. A species of Phytophthora was consistently isolated from necrotic roots. Pathogenicity trials were conducted under hydroponic conditions in a greenhouse at root temperatures of 18 and 28 C. Root necrosis, along with stem decay and plant death, occurred within 5-7 days after inoculation at both temperatures. Reisolation of the fungus from roots and stems of inoculated, but not from roots of non-inoculated plants, confirmed p

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17

Chittem, Kishore. "Genomics and Management of Fusarium Root Rot of Field Peas." Diss., North Dakota State University, 2012. https://hdl.handle.net/10365/26475.

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Dry Pea or field pea (Pisum sativum L.) is an important cool season legume crop grown in the United States. Field peas are vulnerable to many diseases of which, soil borne diseases including wilt and root rot are of major economic importance and can cause significant reduction in yield. There is a dearth of satisfactory methods for control of root rot and no varieties with complete resistance to Fusarium root rot are currently available. Root rot disease was found to be prevalent in all the major pea growing counties of North Dakota surveyed in 2004, 2005, 2010 and 2011. Fusarium species were

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18

Samils, Nicklas. "Monitoring the control methods of Heterobasidion annosum s.l. root rot /." Uppsala : Department of Forest Mycology and Pathology, Swedish University of Agricultural Sciences, 2008. http://epsilon.slu.se/200847.pdf.

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19

Young, Deborah, and Michael Matheron. "Control of Phytophthrowa Root and Crown Rot of Apple Trees." College of Agriculture, University of Arizona (Tucson, AZ), 1990. http://hdl.handle.net/10150/215717.

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20

Matheron, Michael, Deborah Young, and Joe Matejka. "Root and Crown Rot of Apple Trees Caused by Phytophthora." College of Agriculture, University of Arizona (Tucson, AZ), 1990. http://hdl.handle.net/10150/215738.

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21

Kalonji, Kabengele Muzela J. B. "Evaluation of three fungicides for control of soilborne diseases of lettuce seedlings." Diss., University of Pretoria, 2008. http://hdl.handle.net/2263/29549.

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Lettuce (Lactuca sativa L.) seedlings diseases caused by soilborne pathogens are characterised by root rot, stem rot and damping-off of the seedlings that can occur at any time during growth. Fusarium solani, Pythium ultimum and Rhizoctonia solani are known to be the important destructive pathogens of lettuce, causing severe yield losses in South Africa. The aim of this research was to evaluate the effects of three selected fungicides to control these pathogens on lettuce seedlings. In this study the fungicides metalaxyl (Apron®), fludioxonil (Celest®) and mefenoxam (Subdue®) were applied at t

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22

Lee, Jang Hoon. "Effect of fruit removal on carbohydrate concentrations of cantaloupe (Cucumis melo L.) roots in naturally infested soil with Monosporascus cannonballus." Texas A&M University, 2003. http://hdl.handle.net/1969.1/259.

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The effect of fruit removal from cantaloupe was studied under field conditions in a soil naturally infested with Monosporascus cannonballus. Fruit removal resulted in greater sugar accumulation in the cantaloupe roots compared to the roots from plants on which the fruits were allowed to develop normally. Individual, total, and combined root carbohydrate levels were greater in plants without fruit than in plants with fruit. Five major sugars (stachyose, raffinose, sucrose, glucose, and fructose) were found in the cantaloupe roots. Stachyose concentrations were higher than all the other sugars i

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23

Ihrmark, Katarina. "Double-stranded RNA elements in the root rot fungus Heterobasidion annosum /." Uppsala : Swedish Univ. of Agricultural Sciences (Sveriges lantbruksuniv.), 2001. http://epsilon.slu.se/avh/2001/91-576-6310-6.pdf.

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24

Popoola, Temi-Tope Olukayode. "The role of host plant stress in Armillaria root rot infections." Thesis, University of Reading, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.304388.

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25

Verrell, Andrew George. "Water, nitrogen, crown rot and common root rot interact to limit wheat production in northern NSW cropping systems." Thesis, The University of Sydney, 2004. https://hdl.handle.net/2123/27955.

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A multi-variate approach was undertaken to identify the major components of the cropping system that interact to affect yield and water use efficiency (WUE) in wheat in northern NSW. The major components identified from an on-farm monitoring program were rainfall, soil plant available water (PAW) and nitrogen (N) at sowing, grass weeds (GW), crown rot (CR) and common root rot (CRR). Combined, these factors accounted for 80% and 60% of the variation in yield and WUE, respectively. Principal components analysis showed that the region has two seasons; summer and winter, and cluster analy

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26

Dudley, Roy 1972. "Genetic mapping of Armillaria ostoyae using RAPD markers." Thesis, McGill University, 1998. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=20796.

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We report here the use of RAPD-PCR (Random Amplified Polymorphic DNA - Polymerase Chain Reaction) to identify segregating loci in the haploid progeny of an Armillaria ostoyae basidiocarp and the construction of the first genetic linkage map of this fungus, one of the causal species of Armillaria Root Disease. Upon screening 75 RAPD primers, 18 were found to identify a total of 43 loci segregating with a 1 : 1 Mendelian ratio. These loci were analysed for linkage among 58 monospore progeny. The map constructed with Mapmaker (LOD = 3.0, r = 0.38) was confirmed by GMendel (LOD = 1.5, r = 0.38). T

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27

Allay, Sanjita. "Screening of Arbuscular Mycorrhizal Fungi and Plant Growth Promoting Fungi from rhizosphere of Citrus reticulata Blanco and their assessment for management of root rot disease." Thesis, University of North Bengal, 2014. http://ir.nbu.ac.in/hdl.handle.net/123456789/955.

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28

Ziezold, Anya Monique Alix. "Chemical control of disappearing root rot of ginseng caused by Cylindrocarpon destructans." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp03/MQ31877.pdf.

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29

Boshoff, Jane. "Biological control of Pythium wilt and root rot in hydroponically grown lettuce." Pretoria : [s.n.], 2005. http://upetd.up.ac.za/thesis/available/etd-02272007-163651/.

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30

Raziq, Fazli. "Biological and integrated control of the root rot caused by Armillaria mellea." Thesis, University of Reading, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.245321.

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31

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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32

Young, Brian A. "Residual effects of defeated resistance genes on phytophthora root rot of soybean." The Ohio State University, 1989. http://rave.ohiolink.edu/etdc/view?acc_num=osu1333121251.

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33

Mauk, P. A., and R. B. Hine. "A Predictive System for Disease Incidence of Black Root Rot of Cotton." College of Agriculture, University of Arizona (Tucson, AZ), 1987. http://hdl.handle.net/10150/204490.

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A quantitative technique has been developed to assay cotton soils for populations of Thielaviopsis basicola, a soil occurring fungus that causes the seedling disease of cotton known as Black Root Rot. The procedure utilizes a soil dilution technique with a carrot extract agar containing etridiazol, Mystatin, streptomycin sulfate, chlortetracycline, calcium carbonate and PCNB. Populations of the fungus have been monitored from April to December, 1986 in a heavily infested Pima S-6 field in cooperation with Bob Cockrill, a Coolidge grower. When field soils containing approximately 600 propagules

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34

Mahmoud, Mohamed Ahmed Yosra. "Studies on mango soilborne diseases with special reference to Phytophtora root rot." Doctoral thesis, Università di Catania, 2013. http://hdl.handle.net/10761/1454.

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Mango (Mangifera indica L.) is an important fruit crop in many tropical and subtropical countries. Recently, mango has been introduced into Italy mainly in some provinces of Sicily. However, its future as approaching commodity in Sicilian agriculture is threatened by diverse biotic and abiotic threats. This study aimed to assess the occurrence of the fungal soilborne diseases and their causal agents in the island. Special reference was provided to Phytophthora species, oomycetes -like fungi that cause Phytophthora root and crown rot on mango. Surveys were conducted over summer and spring (201

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35

Piercey-Normore, Michele D. "Molecular evolution, identification and epidemiology of North American species of a root-infecting fungus, Armillaria." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape16/PQDD_0003/NQ36212.pdf.

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36

Paula, Júnior Trazilbo José de. "Ecological investigations as a basis for integrated management of bean Rhizoctonia root rot." [S.l. : s.n.], 2002. http://deposit.ddb.de/cgi-bin/dokserv?idn=966435079.

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37

Johnstone, Melanie Beth. "Canopy and leaf gas exchange accompanying Pythium root rot of lettuce and chrysanthemum." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/MQ58346.pdf.

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38

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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39

Thacker, Gary, and Jeff Silvertooth. "Response of Texas Root Rot to a Soil Sterilant in Marana in 1987." College of Agriculture, University of Arizona (Tucson, AZ), 1988. http://hdl.handle.net/10150/204554.

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Methyl bromidelchloropicrin, a soil sterilant, was deep-injected into cotton beds ten days before planting. Within the kill areas of the Texas Root Rot, the soil sterilant had some significant effects on the mortality and yield of the cotton.

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40

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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41

Matheron, M., and J. Matejka. "Phytophthora Gummosis and Root Rot of Citrus-Effect of Temperature on Disease Development." College of Agriculture, University of Arizona (Tucson, AZ), 1991. http://hdl.handle.net/10150/215726.

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Experiments were conducted to examine the effect of temperature on development of Phytophthora gummosis and root rot of citrus as well as the influence of temperature on sporulation of Phytophthora citrophthora and P. parasitica. Maximum production of sporangia by each fungus occurred at 25 C, while slight or no sporangia production occurred at 10, 15, and 35 C. Minimal growth of lesions was observed when stems of rough lemon were inoculated with P. citrophthora or P. parasitica and incubated at 5 and 30 C or 10 and 30 C, respectively. The inhibitory and stimulating effect of certain temperatu

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42

Moya, Ernesto Antonio. "Distribution and interaction of Fusarium crown rot and common root rot pathogens of wheat in Montana and development of an integrated management program for Fusarium crown rot." Thesis, Montana State University, 2010. http://etd.lib.montana.edu/etd/2010/moya/MoyaE0810.pdf.

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This thesis had three objectives: i) Determining distribution of FCR and common root rot (CRR) of wheat in Montana; ii) Determining population dynamics between F. pseudograminearum and Bipolaris sorokiniana at different wheat development stages, and iii) Development of an integrated disease management program for Fusarium crown rot (FCR) using biological and fungicide seed treatments, cultivar resistance, and induced systemic resistance (SAR). Surveys of 91 fields over two years using qPCR identified FCR in 57% and CRR in 93% of the fields surveyed. Bipolaris sorokiniana, F. culmorum and F. ps

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43

El, Masry Mousa Ahmed. "Biological and chemical control of Pythium butleri on tomato." Thesis, University of London, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.265901.

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44

Bovill, Jessica. "Mapping spot blotch & common root rot (causal agent: bipolaris sorokiniana) resistance genes in barley." University of Southern Queensland, Faculty of Sciences, 2008. http://eprints.usq.edu.au/archive/00006178/.

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The fungal pathogen Bipolaris sorokiniana (teleomorph Cochliobolus sativus)causes the foliar disease spot blotch (SB) and the root disease common root rot (CRR). Spot blotch and CRR are serious disease constraints to barley production in warmer growing regions of the world, with estimated yield losses ranging from 30-70% from SB and 15-30% for CRR. Although chemical treatments may assist incontrolling spot blotch infections, the most effective and environmentally sound means of control for each disease is breeding for varieties with natural resistance. InAustralia, no commercially available va

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45

Ottman, Mike. "Nondormant Alfalfa Varieties for Arizona 2017." College of Agriculture, University of Arizona (Tucson, AZ), 2017. http://hdl.handle.net/10150/625864.

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2 p.<br>Alfalfa varieties differ in fall dormancy, defined as growth during the fall. Nondormant alfalfa varieties are usually planted in mild winter areas for their ability to grow in the fall. However, fall growth of nondormant alfalfa may be undesirable in areas subject to repeated frosts or freezes. Nondormant, very nondormant, and extremely nondormant alfalfa varieties (fall dormancy class 8, 9, and 10) are adapted to elevations below 4000 feet in Arizona. Other dormancy classes not included in this publication are moderately nondormant varieties (fall dormancy class 7) which may be grown

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46

Lygis, Vaidotas. "Root rot in north-temperate forest stands : biology, management and communities of associated fungi /." Uppsala : Department of Forest Mycology and Pathology, Swedish University of Agricultural Sciences, 2005. http://epsilon.slu.se/200504.pdf.

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47

Bekker, Theo Frederik. "Efficacy of water soluble silicon for control of phytophthora cinnamomi root rot of avocado." Diss., Pretoria : [s.n.], 2007. http://upetd.up.ac.za/thesis/available/etd-09172007-084901.

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48

Olsen, Mary W., Steven George, and Stanley Heathman. "Application of Systemic Fungicides Through Subsurface Drip Irrigation for Control of Phymatotrichum Root Rot." College of Agriculture, University of Arizona (Tucson, AZ), 1987. http://hdl.handle.net/10150/204491.

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Application of two systemic fungicides, propiconazole (Tilt) and triadimenol (Summit), through subsurface drip irrigation resulted in a significant reduction in the number of dead plants in a Phymatotrichum-infested cotton field. The percent reductions in Tilt treatments were 72% in 1985 and 66% in 1986 and in Summit treatments were reduced 90% in 1985 and 70% in 1986.

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49

Sturesson, Claes. "Nondestructive testing (NDT) of Norway spruce with respect to infection by root and butt rot using ultrasound and acoustic methods." Thesis, Linnéuniversitetet, Institutionen för teknik, TEK, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-15753.

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50

Voelker, Steven L. "Causes of forest decline and consequences for oak-pine stand dynamics in southeastern Missouri /." free to MU campus, to others for purchase, 2004. http://wwwlib.umi.com/cr/mo/fullcit?p1422973.

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