Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 93 for “"disease incidence"”.
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The Efficacy of the Protection Motivation Theory in Predicting Cruise Ship Passengers' Intentions Regarding Norovirus Disease Incidence
… towards healthy behaviors in regard to norovirus disease incidence. Outbreaks of norovirus have serious health and economic consequences. Presently there is no vaccination available; however, handwashing and social distancing can have significant impact upon the course of an outbreak. The …
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Perennial Grass Based Crop Rotations in Virginia: Effects on Soil Quality, Disease Incidence, and Cotton and Peanut Growth
In 2003 eight peanut and cotton crop rotations were established in southeastern Virginia, 4 of which included 2 or 3 years of tall fescue or orchardgrass grown as high-value hay crops. Each crop rotation was evaluated for changes in soil quality indicators including soil carbon and nitrogen, water …
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Lyme Disease Emergence in Virginia: An Examination of the Demographic and Environmental Variables Correlated to the Spatial Pattern of Disease Incidence
Since its initial identification in 1975, Lyme disease has become a public health concern in the U.S. Increased concern is sparked by the rapid rate at which the disease is emerging into new areas. One area of disease emergence is the state of Virginia which has been experiencing exponentially …
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The Association Between Non-Esterified Fatty Acids And Beta-Hydroxybutyrate During The Transition Period In Holstein Dairy Cows And Negative Downstream Outcomes - Disease Incidence, Milk Production And Reproduction
… of NEFA and BHBA above which the development of diseases were more likely; 2) describe statistical methods for best evaluating these effects as risk ratios; 3) identify the NEFA and BHBA critical concentrations associated with decreased reproductive performance and milk production; 4) evaluate …
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The influence of personnel selection on the nature of psychiatric illness in the services
(1) A Study has been made of the disease incidence in a variety of groups admitted to a Base Psychiatric Hospital. (2) The relationships between the group incidence of anxiety state and manic - depressive psychosis and between hysteria and schizophrenia have been indicated. (3) The influence of the …
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FACTORS INFLUENCING A PETAL-BASED FORECASTING SYSTEM FOR SCLEROTINIA STEM ROT OF CANOLA
… infested with Sclerotinia sclerotiorum and the incidence of sclerotinia stem rot: canopy density; diurnal and other weather mediated fluctuations in petal infestation; and long-term changes in infestation during flowering. Disease incidence was significantly related to canopy density,as …
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PREDICTING POTENTIAL ASCOSPORE DOSE OF VENTURIA INAEQUALIS (CKE) WINT IN COMMERCIAL APPLE ORCHARDS OF NEW HAMPSHIRE (MODELING, EPIDEMIOLOGY, DISEASE MANAGEMENT)
… litter at bud break, and ascospores per ascus. Disease incidence and the proportion of lesions that formed mature ascocarps were strongly correlated; lesion fertility was directly proportional to disease incidence at leaf fall. Most lesions from commercial orchards did not produce mature …
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The Spatial and Temporal Distribution and Management of Tomato Bacterial Wilt on Virginia's Eastern Shore
… and Yabucchi et al., is the most devastating disease of tomato on the ESV. Four 'observational trials' were conducted on the ESV over three growing seasons to determine the temporal and spatial distribution of this disease in commercial tomato fields. Plants were assessed at approximately …
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EVALUATION OF FUNGICIDE APPLICATION AT LATE BLOOM FOR THE CONTROL OF SCLEROTINIA STEM ROT IN RAPESEED (CANOLA)
… at late bloom could adequately control the disease in at least some situations. The experiments were designed to determine if the growth stage at which inoculum of 12. sclerotiorum first becomes widespread in the crop affects the efficacy of late bloom application. Rate of application and …
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Modeling the Impact of Projected Land Cover on Lyme Disease Emergence
Lyme disease is a common tick borne disease in the US. Lyme disease emerged from the Northeast and in the past decade, Virginia has been witnessing a rapidly increasing trend in incidence. This thesis uses land cover projection data as a basis to look at the potential future trend of Lyme disease …
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Limits of detection of Magnaporthe oryzae Triticum pathotype in wheat seed: implications for pathogen dissemination
Wheat blast is an emerging disease on wheat, caused by the seed-borne fungal pathogen Magnaporthe oryzae Triticum pathotype (MoT). The first objective of this research was to establish the detection threshold for MoT in infected wheat seeds as a function of sensitivity and specificity of a modified …
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Infection and development of Ustilago syntherismae in Digitaria ciliaris
… out to investigate the mode of infection, the disease incidence that can be obtained by artificial inoculation and the conditions necessary for optimum infection, cross-infection on southern and smooth crabgrass, and the reasons for the late observance of the disease. U. syntherismse infected …
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Evaluation of Biopesticides and Novel Chemicals for Grape Ripe Rot and Sour Rot Disease Management in Virginia
Two endemic late-season grape rot diseases, ripe rot and sour rot continue to pose a significant challenge to grape growers in Virginia and similar climates. Managing these diseases in the vineyard is challenging due to concerns over the increased risk of resistance against traditional single-site …
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Anthracnose on almond: epidemiology and characterisation of Colletotrichum acutatum.
… conditions that are most conducive for disease. There was considerable variation among isolates of C. acutatum from almond in Australia in terms of morphological and cultural characteristics. However, three main morphotypes were evident, namely pink, orange and cream colony colour. In …
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Epidemiology of Horseradish Root Discoloration Caused by Verticillium Dahliae
… were observed two months after planting and disease incidence and severity reached a maximum in August. Greenhouse studies indicated that V. dahliae was able to penetrate both injured and non-injured roots. Under field conditions V. dahliae was first isolated from the feeder roots, indicating …
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Interaction Between Two Root Pathogens and the Epidemiology of Pyrenochaeta Glycines on Soybeans
… was studied in the growth chamber and field. Disease incidence and severity tended to be higher and dry weights lower for plants inoculated with F. oxysporum + R. solani in comparison to either F. oxysporum or R. solani alone and the controls. In addition, competition and/or antagonism was …
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Optimizing grape cluster exposure to increase desirable aroma compounds and decrease disease severity
… fruit zone can improve grape quality and lower disease incidence; however, further investigations on the timing, varietal response and intensity are needed to optimize results and to better understand underlying physiologic responses. Fruit zone leaf thinning was applied at different timing and …
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Integrated Approach to Understanding Tomato Sour Rot and Improving Disease Management on the Eastern Shore of Virginia
… sour rot on tomato fruit attempted to correlate disease incidence with weather conditions in order to better understand the cause of sporadic infection. Few patterns were seen consistently throughout harvest periods and years. Rainfall was positively correlated with disease 2-3 days before …
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Etiology and control of some fruit diseases of avocado (Persea Americana Mill.) at Westfalia Estate
Cercospora spot disease of avocados caused by Pseudocercospora purpurea (Cke) Deighton is described for the first time in South Africa, where it was found to be the most important pre-harvest fruit disease at Westfalia Estate, in the North Eastern Transvaal (longitude 30°10' and latitude 23°45'). …
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The Spatial and Molecular Epidemiology of Lyme Disease in Eastern Ontario
Lyme disease is an emerging tick-borne illness in Canada, with human case numbers increasing 15- to 20-fold since Lyme disease became nationally notifiable in 2009 until the present. In Ontario, Canada's largest province by population, average Lyme disease incidence across the province is similar …
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