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Showing 1 to 20 of 23 for “"downy mildew"”.

  1. Cucurbit Downy Mildew (Pseudoperonospora cubensis): Cucumber Resistance

    Cooper, Jessica G.Virginia Tech2013

    … et Curt) Rost. is the causal agent of cucurbit downy mildew (CDM). It is the most damaging cucumber pathogen on the Eastern Shore of Virginia and eastern parts of the United States. Pseudoperonospora cubensis is an obligate oomycete pathogen, infecting crops within the Cucurbitaceae family. The …

    vt Repository record

  2. Management Strategies for Hop Downy Mildew Utilizing Fungicides and Host Resistance

    Havill, Josh2017

    … compounds that can be used to control hop downy mildew (caused by Pseudoperonospora humuli (Miy. et Takah.) Wils.) and to collect and characterize a panel of 112 diverse H. lupulus accessions for resistance to P. humuli. Results from field fungicide trials indicate that significant …

    umn Repository record

  3. Initial Fine Mapping of the Spinach Downy Mildew Resistance Locus RPF1

    Yang, Wei2017

    … however, is affected by many biotic stresses. Downy mildew, caused by <em>Peronospora farinosa</em> f. sp. <em>spinaciae (Pfs) </em>, is perhaps the most important biotic constraint for spinach production worldwide (Correll et al, 1994). As of 2012, 14 races of <em>Pfs</em> have been reported …

    arkansas Repository record

  4. Investigating the role of downy mildew effectors in host resistance and susceptibility

    Piquerez, SophieUniversity of East Anglia2011

    … eukaryotic plant pathogens such as rusts and mildews can deliver “effector” proteins directly into plant cells in order to manipulate specific defence responses and processes. Hyaloperonospora arabidopsidis (Hpa) is a haustorium-producing biotrophic oomycete pathogen that causes downy mildew …

    east-anglia Repository record

  5. Advancing Sustainable Grape Downy Mildew Management: Biopesticide Trials and Risk Assessment System

    Ames, Jonathan EugeneVirginia Tech2025

    Grape downy mildew, caused by Plasmopara viticola, significantly damages grape crops (Vitis spp.), reducing yields by up to 75% in unprotected vineyards. The Eastern US faces limited fungicide options due to resistance development and potential legal restrictions on EBDC and captan. The first study …

    vt Repository record

  6. INTEGRATING FUNGICIDE RESISTANCE MONITORING AND FORECASTING MODELS FOR THE PRECISION MANAGEMENT OF GRAPEVINE DOWNY MILDEW

    LECCHI, BEATRICEUniversità degli Studi di Milano2026

    … area. Among the diseases affecting grapevine, downy mildew, caused by the biotrophic oomycete Plasmopara viticola, is one of the most destructive, with the potential to cause severe yield losses under favourable environmental conditions. In Europe, the widespread cultivation of a highly …

    milano Repository record

  7. Artificial intelligence and non-invasive sensing technologies for early detection of downy mildew in grapevine

    Hernández Casado, InésUniversidad de La Rioja (España)2025

    Las enfermedades y plagas en cultivos agrícolas representan un grave problema en todo el mundo, repercutiendo gravemente en la calidad y rendimiento de los cultivos. Entre ellas, el mildiu es una enfermedad especialmente devastadora de la vid. La detección precoz es crucial para intervenir a …

    dialnet Repository record

  8. Genetic Resistance to the Downy Mildew Pathogen and Breeding towards Durable Disease Management in Spinach

    Zia, Bazgha2023

    … of spinach include disease pressure imposed by downy mildew, which is caused by Peronospora effusa (=P. farinosa f. sp. spinaciae [Pfs]). A total of 19 new races of P. effusa have emerged, imposing serious challenges to the disease management in spinach production. Accordingly, this study was …

    arkansas Repository record

  9. Identification and functional characterization of RXLR effector proteins that are conserved between downy mildew pathogens and Phytophthora species

    Anderson, Ryan GabrielVirginia Tech2011

    … arabidopsidis (Hpa), the causative agent of downy mildew of Arabidopsis, contains at least 134 candidate RXLR effector genes. These genes contain an RXLR motif required for effector entry into host cells. Only a small subset of these candidate effectors is conserved in related oomycetes. …

    vt Repository record

  10. Dissection of Regulatory Networks Mediating Resistance and Susceptibility of Arabidopsis thaliana to the Downy Mildew Pathogen Hyaloperonospora parasitica

    Hoff, Troy ColstonVirginia Tech2008

    … that activates race-specific resistance to the downy mildew pathogen, Hyaloperonospora parasitica (Hpa). Previously-published genetic epistasis tests have established that RPP7 activates defense responses through a signaling mechanism that does not require accumulation of salicylic acid (SA), or …

    vt Repository record

  11. Microprocessor controlled mildew detector

    Bensch, DagobertDepartment of Electrical Engineering1981

    Downy Mildew is a vineyard disease which has cost the Economy tens of millions of rand in terms of both harvest loss and pest control measures. However, the weather conditions conducive to an outbreak of the disease have been well researched, thus it should be possible to monitor these in the …

    cape-town Repository record

  12. Characterization of fungicide resistance in grape powdery and downy mildew using field trials, bioassays, genomic, and transcriptomic approaches: quinoxyfen, phosphite, and mandipropamid

    Feng, XuewenVirginia Tech2018

    … is a fungicide widely used against grape powdery mildew (Erysiphe necator). In 2013, E. necator isolates with reduced quinoxyfen sensitivity (designated as quinoxyfen lab resistance or QLR) were detected in Virginia. Field trials were conducted in 2014, 2015, and 2016 at the affected vineyard to …

    vt Repository record

  13. Evaluation of Downy Mildew (Peronospora farinosa f.sp. chenopodii) Resistance among Quinoa Genotypes and Investigation of P. farinosa Growth using Scanning Electron Microscopy

    Kitz, Leilani2008

    … farmers in the altiplano of Bolivia and Peru. Downy mildew is the most significant disease of quinoa caused by the pathogen Peronospora farinosa f.sp. chenopodii Byford. This disease greatly impacts quinoa crops with yield losses up to 99%. As fungicides are expensive for farmers, the …

    byu Repository record

  14. The relative effectiveness of homoeopathic potencies of Peronospora parasitica compared to Acrobat (dimethomorph and mancozeb) and Bravo (chlorothalonil) in the control of downy mildew in cabbage seedlings

    Curnow, Janine Margaret2017

    A dissertation submitted in partial compliance with the requirements for the Master's Degree in Technology: Homoeopathy, Technikon Natal, Durban, South Africa, 1998.

    dut Repository record

  15. Studies of the resistance of tobacco to a second attack of Peronospora tabacina adam

    Cox, Carroll E.Virginia Agricultural and Mechanical College and Polytechnic Institute1940

    … of tobacco seedlings to a second attack of downy mildew caused by Peronospora tabacina Adam. Observations were made on the development and duration of resistance following recovery of tobacco seedlings from downy mildew. The duration of the period of resistance is variable and the …

    vt Repository record

  16. Genetic diversity and pathogenicity of pea downy mildew (Peronospora viciae f. sp. pisi) in New Zealand : A thesis submitted in partial fulfilment of the requirements for the Degree of Master of Applied Science at Lincoln University

    Marr, AlexiaLincoln University2019

    Downy mildew of peas is caused by the biotrophic pathogen Peronospora viciae f. sp pisi (Pvp) which occurs sporadically throughout temperate pea growing regions across the world. Severe infections can completely disrupt commercial production by reducing crop quality and yield; early season systemic …

    lincoln Repository record

  17. New Tools to Understand Mechanisms of Nutrient Transfer from Plants to Biotrophic Pathogens

    Dinkeloo, KasiaVirginia Tech2018

    … interaction between Arabidopsis and its natural downy mildew pathogen, Hyaloperonospora arabidopsidis (Hpa), provides a model for understanding how oomycetes colonize plants. Hpa is a model organism for many highly destructive oomycete pathogens and transcriptomics of this interaction have been …

    vt Repository record

  18. Fungicide Sensitivity of Erysiphe necator and Plasmopara viticola from Virginia and nearby states

    Colcol, Jeneylyne FerreraVirginia Tech2008

    … undertaken to determine the sensitivity of grape downy mildew (DM, Plasmopara viticola) and powdery mildew (PM, Erysiphe necator) to commonly used single-site fungicides in Virginia and nearby states. DM and PM isolates were collected from 2005 to 2007. In grape leaf disc bioassays, 92% of the DM …

    vt Repository record

  19. Molecular Analysis of Oomycete Pathogens to Identify and Translate Novel Resistance Mechanisms to Crops

    Fedkenheuer, Kevin E.Virginia Tech2016

    … infection of Arabidopsis thaliana by the downy mildew pathogen Hyaloperonospora arabidopsidis (Hpa). We identified five gene clusters with expression patterns specific to the susceptible interaction. Genes from each cluster were selected and null mutants were tested for altered …

    vt Repository record

  20. Understanding the role of host amino acid transporters in nutrient acquisition by oomycete pathogens

    Sonawala, Unnati SubhashVirginia Tech2019

    … on Arabidopsis thaliana. It is related to downy mildews of economically important crops such as cabbage, kale and broccoli, belonging to the Brassicaceae family. Downy mildew pathogens are obligate biotrophs that extract nutrients exclusively from living plant cells. As a part of its …

    vt Repository record

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