Log in

Relevant bibliographies by topics / Beans – Diseases and pests / Dissertations / Theses

To see the other types of publications on this topic, follow the link: Beans – Diseases and pests.

Dissertations / Theses on the topic 'Beans – Diseases and pests'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 dissertations / theses for your research on the topic 'Beans – Diseases and pests.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.

1

Dennis, Jeremy Ian. "Chocolate spot of faba beans in South Australia." Title page, contents and summary only, 1991. http://web4.library.adelaide.edu.au/theses/09A/09ad411pdf.pdf.

Full text

Abstract:

Bibliography: leaves 81-100. Entry of inoculum into a crop and disease development in the crop cannot be prevented because spores are airborne and there is a lack of highly resistant varieties. This makes complete control of chocolate spot unlikely. It should however, be possible to improve current levels of disease control through the integration of the factors identified in the study.

APA, Harvard, Vancouver, ISO, and other styles

2

Lawsawadsiri, Somporn. "Variation in resistance to Ascochyta blight in faba beans." Title page, contents and summary only, 1994. http://web4.library.adelaide.edu.au/theses/09PH/09phl425.pdf.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Noronha, Christine M. (Christine Mary). "Effects of density and host plant type on fecundity and survival of Delia radicum (Bouché), D. Antiqua (Meigen) and D. Platura (Meigen) (Diptera: Anthomyiidae)." Thesis, McGill University, 1992. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=41017.

Full text

Abstract:

The effects of intraspecific and interspecific competition, host plant, and prior host plant experience on fecundity, rate of oviposition and mortality of adults and larval survival of Delia radicum Bouche (Cabbage Maggot (CM)), D. antiqua Meigen (Onion Maggot (OM)), and D. platura Meigen (Seed Corn Maggot (SCM)), were studied on cabbage, onion and bean plants.<br>An optimum density for maximum fecundity per female was observed when the four experimental densities were compared. This optimum density was higher on host than on non-host plants. CM females were host specific and did not oviposit

APA, Harvard, Vancouver, ISO, and other styles

4

Yakop, Uyek Malik. "Resistance of faba beans to Ascochyta blight." Title page, contents and summary only, 1998. http://web4.library.adelaide.edu.au/theses/09APSM/09apsmy15.pdf.

Full text

Abstract:

Bibliography: leaves 111-120. This study investigated various aspects of genetic resistance in fava beans to Ascochta blight (A. fabae) with the objective to facilitate an efficient breeding strategy for long-term control. Pathogenic variability of A. fabae was found to be high, as was genetic variation between resistant fava bean accessions. A number of alternative resistance genes to that of Ascot cultivar were identified.

APA, Harvard, Vancouver, ISO, and other styles

5

Jimenez, Garcia Emilio. "ETIOLOGY, PATHOLOGY AND CHARACTERIZATION OF VIRUSES FROM BEANS GROWING IN THE SONORA DESERT OF MEXICO (COWPEA, CHLOROTIC MOTTLE)." Diss., The University of Arizona, 1985. http://hdl.handle.net/10150/187907.

Full text

Abstract:

Survey of crops of common bean (Phaseolus vulgaris L.) in Sonora, Mexico revealed the presence of two isometric viruses and one flexuous rod virus on the basis of host reaction, particle morphology, serology and physico-chemical properties. The isometric viruses were identified as Bean Southern Mosaic Virus (BSMV) and Cowpea Chlorotic Mottle Virus (CCMV); the flexuous rod virus was identified as Bean Common Mosaic Virus (BCMV). Using bean cultivar differentials, two strains of the potyvirus BCMV were identified, NY-15 and a previously undescribed strain designated YV-1. Host range, serological

APA, Harvard, Vancouver, ISO, and other styles

6

Bressan, Dayanne Fabrício. "Uso dos eliciadores acibenzolar-s-metílico e harpina na indução de resistência em plantas de feijoeiro comum ao crestamento bacteriano." Universidade Tecnológica Federal do Paraná, 2011. http://repositorio.utfpr.edu.br/jspui/handle/1/232.

Full text

Abstract:

CAPES<br>O crestamento bacteriano comum, causado por Xanthomonas axonopodis pv. phaseoli, é uma das principais doenças da cultura do feijoeiro. Em busca por alternativas no controle de doenças em plantas, o uso de eliciadores/indutores de resistência tem sido explorado. Desta forma, o objetivo deste trabalho foi verificar a eficiência dos eliciadores harpina e acibenzolar-S-metílico na indução de mecanismos de defesa em plantas de feijoeiro (Phaseolus vulgaris L.) ao crestamento bacteriano comum, causado por X. axonopodis pv. phaseoli, avaliandose possíveis alterações no processo de trocas gas

APA, Harvard, Vancouver, ISO, and other styles

7

Lagos, Frank Silvano. "Uso do leite de vaca no controle do oídio em feijão-de-vagem." Universidade Tecnológica Federal do Paraná, 2009. http://repositorio.utfpr.edu.br/jspui/handle/1/239.

Full text

Abstract:

A crescente procura por alimentos mais saudáveis demanda um aumento na produção isenta de agrotóxicos. O feijão-de-vagem é uma das principais olerícolas cultivadas no Brasil. Dentre as principais doenças que afetam essa cultura está o oídio, podendo ocasionar perdas de produção em até 69%, sendo de ocorrência comum em cultivos protegidos especialmente em períodos tardios. O uso do leite tem demonstrado boas perspectivas no controle desta doença em diversas culturas. Foram desenvolvidos na Universidade Tecnológica Federal do Paraná – Campus de Pato Branco – PR, nos anos de 2007 e 2008, trabalho

APA, Harvard, Vancouver, ISO, and other styles

8

Cieslik, Lucas Fernando. "Interferência de fatores morfoambientais e horários de aplicação de fluazifop-p-butyl e fomesafen no controle de infestantes, seletividade e lucratividade da cultura do feijoeiro (Phaseolus vulgaris L.)." Universidade Tecnológica Federal do Paraná, 2012. http://repositorio.utfpr.edu.br/jspui/handle/1/263.

Full text

Abstract:

Fundação Araucária, CNPQ<br>Plantas daninhas competem com as cultivadas e dentre as influências negativas desse convívio está a redução da produtividade das culturas. O controle químico é a principal forma de gestão das infestantes na cultura do feijão (Phaseolus vulgaris L.). Sua eficácia depende de uma série de fatores, entre eles: condições ambientais (em função dos horários de aplicação) no momento da aspersão do herbicida e doses utilizadas. Um programa de pesquisa foi desenvolvido no curso de Agronomia da UTFPR, Pato Branco, PR, durante a safra 2010/11 com os objetivos gerais de analisar

APA, Harvard, Vancouver, ISO, and other styles

9

Machado, Adriano Bressiani. "Impacto agronômico e dano econômico da interferência entre leiteiro (Euphorbia heterophylla) e feijoeiro (Phaseolus vulgaris) em intervalos distintos de semeadura." Universidade Tecnológica Federal do Paraná, 2012. http://repositorio.utfpr.edu.br/jspui/handle/1/265.

Full text

Abstract:

A cultura do feijoeiro apresenta grande importância econômica para o Brasil e especificamente para a região do Sudoeste do Paraná, onde é cultivado principalmente em pequenas e médias propriedades. Constitui-se em um dos alimentos mais ricos consumido pelo povo brasileiro, principalmente para as populações mais pobres. É imprescindível o estudo cientifico dos sistemas de produção e o avanço tecnológico para aumentar sua produtividade e rentabilidade. Entre os gargalos limitantes à cultura, está a necessidade de estudar melhor os níveis populacionais de plantas daninhas que justificam o seu con

APA, Harvard, Vancouver, ISO, and other styles

10

Mazaheri, Lucy. "Development of a Molecular Marker to Track APA G40199 Introgression in Common Bean for Bruchid Resistance." Thesis, North Dakota State University, 2018. https://hdl.handle.net/10365/29300.

Full text

Abstract:

In common bean (Phaseolus vulgaris), the main seed storage pests are the bruchid beetles. Damage done to the seed by the larvae has a large impact on seed quality and yield. Arcelin (ARC), phytohaemagglutinin (PHA), and α-amylase inhibitor (α-AI) are linked seed storage proteins that form the APA locus on chromosome Pv04 and are associated with resistance. A major breeding objective is to introduce bruchid resistance into common bean from a resistant tepary genotype, G40199, by introgressing the resistant APA locus into susceptible common bean backgrounds. Here we developed a molecular marke

APA, Harvard, Vancouver, ISO, and other styles

11

Sing, Sharlene E. "Suppression of bruchids infesting stored grain legumes with the predatory bug Xylocoris flavipes (Reuter) (hemiptera: anthocoridae)." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp04/mq29789.pdf.

Full text

APA, Harvard, Vancouver, ISO, and other styles

12

Krieger, Izabel. "Critérios para aplicação de fungicidas visando ao controle de doenças foliares do feijoeiro comum e análise econômica." Universidade do Estado de Santa Catarina, 2006. http://tede.udesc.br/handle/handle/1244.

Full text

Abstract:

Made available in DSpace on 2016-12-08T16:44:53Z (GMT). No. of bitstreams: 1 PGPV07MA017.pdf: 316351 bytes, checksum: 90f3d3dd654e7567ae2c313d163704f6 (MD5) Previous issue date: 2006-02-24<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>The indications for the beginning of the application of fungicides to control the common bean diseases are scarce and few precise, following different criteria, as: growth stages, fixed program of calendar, information on climatic conditions, inoculum density and disease intensity in the plant.Most of these cases, the applications of fungici

APA, Harvard, Vancouver, ISO, and other styles

13

Trembley, Marcella L. "The effect of mechanical weed cultivation on crop yield and quality, disease incidence and phenology in snap bean, carrot and lettuce crops." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape16/PQDD_0003/MQ29801.pdf.

Full text

APA, Harvard, Vancouver, ISO, and other styles

14

Godschalx, Adrienne Louise. "Symbiosis with Nitrogen-fixing Rhizobia Influences Plant Defense Strategy and Plant-predator Interactions." PDXScholar, 2017. https://pdxscholar.library.pdx.edu/open_access_etds/3644.

Full text

Abstract:

As sessile organisms, plants evolved a plethora of defenses against their attackers. Given the role of plants as a primary food source for many organisms, plant defense has important implications for community ecology. Surprisingly, despite the potential to alter entire food webs and communities, the factors determining plant investment in defense are not well-understood, and are even less understood considering the numerous symbiotic interactions in the same plant. Legume-rhizobia symbioses engineer ecosystems by fixing nitrogen from the atmosphere in trade for plant photosynthates, yet conne

APA, Harvard, Vancouver, ISO, and other styles

15

Zhou, Ting. "Biological control of white mold of bean (Phaseolus vulgaris L.) by Epicoccum purpurascens Ehrenb. ex Schlecht." Thesis, McGill University, 1991. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=74616.

Full text

Abstract:

After a wild-type isolate of Epicoccum purpurascens was exposed to shortwave ultraviolet light, several new strains were recovered which were improved in sporulation, fungicide tolerance, and performance in suppression of white mold caused by Sclerotinia sclerotiorum. The efficacy of E. purpurascens in controlling white mold of snap bean (Phaseolus vulgaris) was assessed in greenhouse and field trials. White mold was significantly reduced in both greenhouse and field trials when 2-4 sprays of E. purpurascens conidial suspensions (in 1% malt extract) were sprayed onto the plant surface during t

APA, Harvard, Vancouver, ISO, and other styles

16

Kasiamdari, Rina Sri. "Interactions between arbuscular mycorrhizal fungi and other root-infecting fungi." Title page, contents and abstract only, 2001. http://web4.library.adelaide.edu.au/theses/09PH/09phk1887.pdf.

Full text

APA, Harvard, Vancouver, ISO, and other styles

17

Masli, Aryananda. "Search for restriction fragment length polymorphism of Phaseolus vulgaris in relation to the immune gene to bean common mosaic virus." Thesis, University of North Texas, 1991. https://digital.library.unt.edu/ark:/67531/metadc798405/.

Full text

Abstract:

A technique involving Restriction Fragment Length Polymorphism (RFLP) was used to observe the DNA fragment polymorphism between a bean cultivar with I/I genotype and a bean cultivar with i/i genotype. The I gene encodes immunity to bean common mosaic virus (BCMV).

APA, Harvard, Vancouver, ISO, and other styles

18

Terry, Alan J. "Control of pests and diseases." Thesis, University of Surrey, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.505965.

Full text

APA, Harvard, Vancouver, ISO, and other styles

19

Srinivasan, Indira. "Isolation and detection of bean yellow mosaic, clover yellow vein and peanut stunt viruses from Trifolium L. species." Thesis, This resource online, 1992. http://scholar.lib.vt.edu/theses/available/etd-09122009-040402/.

Full text

APA, Harvard, Vancouver, ISO, and other styles

20

George, Adrienne. "Cataloguing Diseases and Pests in Captive Corals." Scholar Commons, 2011. http://scholarcommons.usf.edu/etd/3115.

Full text

Abstract:

Stony corals (Order Scleractinia) are susceptible to a variety of diseases, which can occur from abiotic or biotic factors, or a combination of both. Public aquaria provide opportunities to study coral disease. Because coral mucus is the first line of defense against disease, the Biolog EcoplateTM is a useful tool to detect differences in microbial assemblages in the surface mucopolysaccharide (mucus) layer when comparing healthy and diseased corals. Histological examination is essential to document structural changes in coral tissue in response to diseases. This study identifies and character

APA, Harvard, Vancouver, ISO, and other styles

21

Denman, Sandra. "Botryosphaeria diseases of proteaceae." Thesis, Stellenbosch : Stellenbosch University, 2002. http://hdl.handle.net/10019.1/52721.

Full text

Abstract:

Dissertation (PhD (Agric))--University of Stellenbosch, 2002.<br>ENGLISH ABSTRACT: Fungi belonging to the genus Botryosphaeria are heterotrophic micromycetes that can be pathogens on woody plants. They cause serious, and in some cases devastating losses to crops through leaf necrosis, stem cankers and plant death. The Proteaceae cut-flower industry in South Africa accounts for 70% of the national cut-flower enterprise. Botryosphaeria diseases are a major impediment to production and trade of Proteaceae and there is an urgent need to investigate the etiology, epidemiology and control of t

APA, Harvard, Vancouver, ISO, and other styles

22

Lubbe, Carolien M. "Colletotrichum diseases of Proteaceae." Thesis, Stellenbosch : Stellenbosch University, 2004. http://hdl.handle.net/10019.1/53732.

Full text

Abstract:

Thesis (MSc)--Stellenbosch University, 2004.<br>ENGLISH ABSTRACT: This thesis consists of four chapters that present research findings on Colletotrichum diseases associated with Proteaceae worldwide. The first chapter is a review of literature regarding the taxonomy and histology of Colletotrichum species associated with Proteaceae. The literature is not restricted to Proteaceae hosts, as information regarding Colletotrichum on Proteaceae is very limited. In chapter two, Colletotrichum spp. associated with proteaceous hosts growing in various parts of the world were identified based on m

APA, Harvard, Vancouver, ISO, and other styles

23

Wakgari, Waktola (Waktola Muleta). "Biology, ecology and management of white wax scale, Ceroplastes destructor Newstead (Hemiptera: Coccidae), on citrus and syzygium." Thesis, Stellenbosch : Stellenbosch University, 2000. http://hdl.handle.net/10019.1/51637.

Full text

Abstract:

Thesis (PhD)--University of Stellenbosch, 2000.<br>ENGLISH ABSTRACT: The population density of the white wax scale, Ceroplastes destructor Newstead, has increased since 1994 in certain areas of Western and parts of Eastern Cape Provinces of South Africa where citrus is grown, particularly on Citrus reticulata (Blanco). A study was conducted to investigate its morphology, biology and ecology as contributions to the development of a sound integrated management programme. Characteristics of the immature stages and adult females were described and illustrated from field-collected and slide-

APA, Harvard, Vancouver, ISO, and other styles

24

Rodriguez, Juan Jose. "Movement and Accumulation of Candidatus Liberibacter Solanacearum in Potato Plants." Diss., North Dakota State University, 2012. https://hdl.handle.net/10365/26726.

Full text

Abstract:

A new disease affecting potatoes was first detected in Mexico in 1993. Affected plants had aerial symptoms similar to those caused by potato purple top and psyllid yellows, but tubers had internal brown discoloration when sliced and dark stripes and streaks when processed to produce potato chips. The disease has been found in many potato production areas in Guatemala, Mexico, Honduras, New Zealand and the United States. The disease, termed Zebra Chip (ZC), has been associated with the presence of heavy infestations of the potato-tomato psyllid (Bactericera cockerelli). In 2009, a research grou

APA, Harvard, Vancouver, ISO, and other styles

25

Mukoko, Olivia Zvinofa. "Breeding beans (Phaseolus vulgaris L.) for resistance to bean common mosaic virus in Zimbabwe." Thesis, University of Cambridge, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.240145.

Full text

APA, Harvard, Vancouver, ISO, and other styles

26

Jensen, Paul. "An evaluation of potential apple replant disease treatments for Quebec /." Thesis, McGill University, 1985. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=63295.

Full text

APA, Harvard, Vancouver, ISO, and other styles

27

Lee, Yi-Chen. "EVALUATION OF SOYBEAN DISEASES AND PESTS USING TWO ADVANCED BREEDING POPULATIONS." OpenSIUC, 2021. https://opensiuc.lib.siu.edu/dissertations/1927.

Full text

Abstract:

Soybean (Glycine max [L.] Merr.) is one of the most important crops in the world. The average annual yield losses due to soybean diseases and pests are estimated to be around 11% in the United States. Soybean yield losses due to sudden death syndrome (SDS), caused by the fungus Fusarium virguliforme O'Donnell & T. Aoki have been problematic in majority of the soybean producing states. In recent years, reniform nematode (RN, Rotylenchulus reniformis Linford and Oliveira) and frogeye leaf spot (FLS), caused by the fungus Cercospora sojina K. Hara have emerged as a major problem in the southern s

APA, Harvard, Vancouver, ISO, and other styles

28

Chauhan, Ramola. "A study of filamentous viruses in maize and smallgrains." Master's thesis, University of Cape Town, 1985. http://hdl.handle.net/11427/22013.

Full text

Abstract:

Bibliography: pages 175-184.<br>The occurrence of maize dwarf mosaic virus (MDMV) in field grown maize was investigated. For this purpose, maize showing mosiac symptoms was collected from different maize growing areas in South Africa by Prof. M.B. von Wechmar. These samples from Transvaal, Orange Free State and Natal were then investigated for the presence of MDMV and possible strains of this virus. Three virus isolates were purified and partially characterised. These isolates were serologically compared together with a fourth isolate SCMV 4975, obtained from the U.S., to establish strain rela

APA, Harvard, Vancouver, ISO, and other styles

29

Loots, Shilo. "Isolation and characterization of Diuraphis noxia induced sequences from wheat line PI 294994." Diss., University of Pretoria, 2002. http://hdl.handle.net/2263/25763.

Full text

APA, Harvard, Vancouver, ISO, and other styles

30

Laberge, Christiane. "Production and diseases of Jerusalem artichoke." Thesis, McGill University, 1986. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=65448.

Full text

APA, Harvard, Vancouver, ISO, and other styles

31

Greiner, Blake William. "Inoculation and Spread of Dickeya in Potatoes." Thesis, North Dakota State University, 2019. https://hdl.handle.net/10365/29461.

Full text

Abstract:

Field experiments were conducted in two different growing environments to evaluate the spread and movement of Dickeya dadantii. A procedure to inoculate seed potatoes with Dickeya dadantii was developed to use during this study. Spread of Dickeya dadantii from inoculated potato seed to healthy potato seed during the handling, cutting and planting procedures was not detected at either location. Spread of Dickeya dadantii from inoculated seed to surrounding progeny tubers in the field was documented in both locations. In Florida, 33% of progeny tubers tested positive for Dickeya using PCR, and i

APA, Harvard, Vancouver, ISO, and other styles

32

Hopkinson, Sarah J. "Puccinia graminis f.sp. tritici, race c17 : physiology of uredospore germination and germtube differentiation." Thesis, University of British Columbia, 1988. http://hdl.handle.net/2429/27957.

Full text

Abstract:

Germinating uredospores of race C17 of Puccinia graminis f.sp. tritici form characteristic infection structures (appressorium, infection peg, vesicle, infection hypha) in response to a 1.5 h heat shock at 29° C administered 2 h after germination at 19° C. The proportion of sporelings forming infection structures was augmented by nutrients, n-nonyl alcohol and, an appropriately timed heat shock. The heat shock temperature required to induce maximum differentiation had a very precise optimum which varied slightly for each spore lot. Variations one degree above or below this optimum reduced the p

APA, Harvard, Vancouver, ISO, and other styles

33

Lombard, Lorenzo. "Fungal diseases in Eucalyptus and Acacia nurseries in South Africa." Diss., University of Pretoria, 2004. http://hdl.handle.net/2263/24484.

Full text

Abstract:

Studies presented in this dissertation highlight the importance of fungal pathogens in forestry nurseries in South Africa. Both Acacia meamsii seedlings and Eucalyptus hybrid cuttings are shown to be affected by important nursery pathogens. Chapter one presents an evaluation of the potential importance of pathogens to Eucalyptus hedge plants maintained in hydroponics. Hydroponics is a new technology being used in South African forest nurseries, which allows for the rapid establishment of Eucalyptus hedge plants. However, no information is available on pathogens affecting Eucalyptus in hydropon

APA, Harvard, Vancouver, ISO, and other styles

34

Dhliwayo, Tererayi. "Alternative products in the inhibition of te plant pathogen scleroyinia sclerotiorum on potato production." Thesis, Nelson Mandela Metropolitan University, 2008. http://hdl.handle.net/10948/941.

Full text

Abstract:

White mold caused by Sclerotinia sclerotiorum attacks a wide host range of broad-leafed plants which includes potatoes. Current control is limited to the use of chemicals, but biological control has emerged as an eco-friendly alternative. For the study, 19 bacterial strains and 18 fungal strains obtained from soil samples taken from a potato field naturally infested with the pathogen S. sclerotiorum were tested for the effects on S. sclerotiorum mycelium growth and sclerotia viability in vitro. A total of eight bacterial strains and six fungal strains proved to be effective in the inhibition o

APA, Harvard, Vancouver, ISO, and other styles

35

Filion, Martin. "The application of real-time PCR to investigate the effect of the arbuscular mycorrhizal fungus Glomus intraradices on the plant pathogen Fusarium solani f. sp. phaseoli /." Thesis, McGill University, 2002. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=82870.

Full text

Abstract:

The effect of the arbuscular mycorrhizal symbiosis at reducing the incidence of root diseases has received considerable attention. However, information on the role of mycorrhizae in reducing disease incidence of Fusarium root rot of beans (Phaseolus vulgaris), caused by the root pathogen Fusarium solani f. sp. phaseoli, is scarce. A study was undertaken to investigate how the arbuscular mycorrhizal fungus (AMF) Glomus intraradices affects disease development and population number of F. solani f. sp. phaseoli in the mycorhizosphere of bean plants growing in an experimental microcosm unit

APA, Harvard, Vancouver, ISO, and other styles

36

Van, der Walt Rachel. "Identifying volatile emissions associated with False Codling Moth infested citrus fruit." Thesis, Nelson Mandela Metropolitan University, 2012. http://hdl.handle.net/10948/d1020056.

Full text

Abstract:

False codling moth is a known pest of economic importance to many cultivated crops in South Africa and Africa south of the Sahara, and is particularly severe on citrus. If the fruit is infested just before harvest the chances of detecting signs of infestation are very low. As a result, the risk of packaging infested fruit and exporting them as healthy fruit is high. It is therefore a priority to develop a post-harvest technique for detection of False codling moth in citrus fruit at different levels of infestation in order to reduce phytosanitary risk. Compounds released and detected were indic

APA, Harvard, Vancouver, ISO, and other styles

37

Ferreira, Anton. "Further studies on leaf blackening of proteas." Thesis, Stellenbosch : University of Stellenbosch, 2005. http://hdl.handle.net/10019.1/2879.

Full text

Abstract:

Thesis (MscAgric (Horticulture))--University of Stellenbosch, 2005.<br>The occurrence of both pre- and postharvest leaf blackening in certain Protea species and cultivars is a problem that severely limits their marketability, vase life and transport options. This research focuses on : (I) The distribution of carbohydrates in inflorescence bearing stems of certain Protea cultivars from harvest, following pulsing with a 10 g.L-1 glucose solution until four weeks postharvest. Stems were held under a variety of postharvest conditions, and (II) The suppression of Protea postharvest leaf blackening

APA, Harvard, Vancouver, ISO, and other styles

38

Kelly, Jack, and Mary W. Olsen. "Problems and Pests of Agave, Aloe, Cactus and Yucca." College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 2011. http://hdl.handle.net/10150/144789.

Full text

Abstract:

12 pp.<br>plant disease bulletins; July 2006 original publishing date, rev. 10/08<br>Cacti, agaves and yuccas are classified as succulents, plants that have highly specialized anatomical features such as thick waxy cuticles, fleshy or minimal leaves, modified leaves (spines), and roots with extra storage capabilities for food and water. These modifications allow them to survive and thrive in harsh desert environments. They survive long periods of drought in areas of sparse rainfall and intense heat. During stressful periods, many succulents cease to grow, drop unnecessary leaves, dehydrate an

APA, Harvard, Vancouver, ISO, and other styles

39

Fitzpatrick-Peabody, Erica. "Methodology and Assessment of the Susceptibility of Potato Genotypes to Phytophthora Erythrosetpica Causal Organism of Pink Rot." Fogler Library, University of Maine, 2008. http://www.library.umaine.edu/theses/pdf/Fitzpatrick-PeabodyER2008.pdf.

Full text

APA, Harvard, Vancouver, ISO, and other styles

40

Luffman, Margie. "Late yellow rust (Pucciniastrum americanum (Farl.) Arth.) of Red raspberry (Rubus idaeus L.)." Thesis, McGill University, 1988. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=61841.

Full text

APA, Harvard, Vancouver, ISO, and other styles

41

Odendaal, Deidre. "Orchard and bin treatment with entomopathogenic nematodes (Rhabditida: Steinernematidae and Heterorhabditidae) for the control of the codling moth (Cydia pomonella)." Thesis, Stellenbosch : Stellenbosch University, 2015. http://hdl.handle.net/10019.1/97962.

Full text

Abstract:

Thesis (MSc)--Stellenbosch University, 2015.<br>ENGLISH ABSTRACT: The codling moth, Cydia pomonella (Lepidoptera: Tortricidae), is the key pest of apples and pears worldwide. The withdrawal of certain fundamental chemicals from codling moth management spray programmes, due to concerns about human, environmental and ecosystem health, has resulted in the search for softer, more environmentally friendly, and safer control measures. Entomopathogenic nematodes (EPNs), naturally occur in the soil, and actively search for hosts. The interest in using EPNs from the families Heterorhabditidae and Stein

APA, Harvard, Vancouver, ISO, and other styles

42

Upadhaya, Arjun. "Plant-Parasitic Nematodes in Field Pea and Potato and their Effect on Plant Growth and Yield." Thesis, North Dakota State University, 2018. https://hdl.handle.net/10365/28875.

Full text

Abstract:

In this study, surveys were conducted in pea and potato fields in North Dakota and Central Minnesota to investigate the incidence and abundance of plant-parasitic nematodes in these fields. Moreover, the effect of the pin nematode, Paratylenchus nanus, on plant growth and yield of six field pea cultivars was determined under greenhouse conditions. Similarly, the influence of lesion nematode, Pratylenchus penetrans, and wilt fungi, Fusarium oxysporum alone and together on growth and yield of potato cultivar ‘Red Norland’, was evaluated in microplots under field conditions. The results indicate

APA, Harvard, Vancouver, ISO, and other styles

43

Birla, Keshav. "Characterization of Cytochrome B from European Field Isolates of Cercospora Beticola with Quinone Outside Inhibitor Resistance." Thesis, North Dakota State University, 2012. https://hdl.handle.net/10365/26553.

Full text

Abstract:

Cercospora leaf spot (CLS), caused by the fungal pathogen Cercospora beticola, is the most important foliar disease of sugar beet worldwide. Control strategies for CLS rely heavily on fungicides including quinone outside inhibitor (QOI) fungicides. We collected 866 C. beticola isolates from sugar beet growing regions in France and Italy and assessed their sensitivity to the QOI fungicide pyraclostrobin. To gain an understanding of the molecular basis of QOI resistance, we cloned the full-length coding region of Cbcytb. All tested QOI-resistant isolates harbored a point mutation in Cbcytb at nu

APA, Harvard, Vancouver, ISO, and other styles

44

Larous, Larbi. "Comparative ultrastructure and cytochemistry of rust infections, with particular reference to Puccinia menthae and Uromyces vicia-fabae." Thesis, University of Sheffield, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.294389.

Full text

APA, Harvard, Vancouver, ISO, and other styles

45

Melander, Margareta. "Transgenic resistance to pathogens and pests /." Alnarp : Dept. of Crop Science, Swedish Univ. of Agricultural Sciences, 2004. http://epsilon.slu.se/a496.pdf.

Full text

APA, Harvard, Vancouver, ISO, and other styles

46

Windell, Nicole Elizabeth. "Leaf blackening and the control thereof in selected Protea species and cultivars." Stellenbosch : Stellenbosch University, 2012. http://hdl.handle.net/10019.1/20396.

Full text

Abstract:

Thesis (MScAgric)--Stellenbosch University, 2012.<br>ENGLISH ABSTRACT: Leaf blackening, a postharvest disorder which is characterized by a dark brown to black discoloration, is found in most commercially important Protea cut flower species and cultivars. As this disorder is known to increase with storage time, it is a major concern to the South African industry as the use of sea freight is increasingly preferred due to lower transport costs and a more favourable carbon footprint. The cause of leaf blackening has been strongly linked to a carbohydrate stress exerted by the large infloresce

APA, Harvard, Vancouver, ISO, and other styles

47

Coluzzi, Karen. "Arthropod Scavengers of Colorado Potato Beetle (Leptinotarsa Decemlineata) Cadavers." Fogler Library, University of Maine, 2005. http://www.library.umaine.edu/theses/pdf/ColuzziK2005.pdf.

Full text

APA, Harvard, Vancouver, ISO, and other styles

48

Damavandian, M. R. "Biology of subterranean populations of woolly apple aphid, Eriosoma lanigerum (Hausmann)(Homoptera:Aphididae), in apple orchards." Thesis, Stellenbosch : Stellenbosch University, 2000. http://hdl.handle.net/10019.1/51638.

Full text

Abstract:

Dissertation (PhD (Agric))--University of Stellenbosch, 2000.<br>ENGLISH ABSTRACT: A study was made of the basic biology of subterranean Eriosoma lanigerum (Hausmann) populations in apple orchards in the Western Cape Province of South Africa. The absence of cornicles and the presence of a vulva could be used to identify 1st instar nymphs and adults respectively. Body length, body width and length of the hind femur are useful for separating 2nd , 3rd and 4th instars. However, separation of 2nd from 3rd instar nymphs was very unreliable. Maximum population growth rate was at 23°C while

APA, Harvard, Vancouver, ISO, and other styles

49

Amrhein, John Francis. "Modeling the impact of gypsy moth defoliation in individual tree mortality and basal area growth of northern hardwoods of central Pennsylvania." Thesis, Virginia Tech, 1988. http://hdl.handle.net/10919/43380.

Full text

Abstract:

Data for this study were collected by the US Forest Service and the Pennsylvania Bureau of Forestry on nearly 600 plots in central Pennsylvania. Tree and stand characteristics recorded between 1978 and 1985 include estimates of percent defoliation on individual trees. Logistic regression using maximum likelihood estimation was employed to model individual-tree mortality of 15 species in central Pennsylvania that had been defoliated by the gypsy moth. Defoliation was estimated to the nearest ten percent for individual trees. Other variables used for prediction included stand basal area and an i

APA, Harvard, Vancouver, ISO, and other styles

50

McConnell, Steven P. "Effects of gypsy moth defoliation on acorn production and viability, litterfall, and litter layer depth and biomass in north-central Virginia and western Maryland." Thesis, Virginia Tech, 1988. http://hdl.handle.net/10919/45883.

Full text

Abstract:

<p>The effects of gypsy moth defoliation on acorn production (the seed source for oak regeneration), and the forest floor regeneration environment were investigated. Parameters measured included: acorn quantity, weight, development, and viability; litterfall; and forest floor depth and biomass. Nineteen plots in north-central Virginia and western Maryland on which trees suffered heavy, moderate, or no defoliation were monitored over a two-year period.</p><br>Master of Science

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!