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Showing 1 to 20 of 44 for “"pythium"”.
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Ginsenosides, Glycosidases and the Ginseng-Pythium Interaction
… oomycete root pathogens of ginseng, most notably Pythium irregulare Buisman, are able to partially deglycosylate the 20 (S)-protopanaxadiol ginsenosides Rb1, Rd and gypenoside XVII via extracellular glycosidases (ginsenosidases), leading to the formation of a common product, ginsenoside F2. In …
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Optimizing in-vitro production of Delaware-isolated Pythium zoospores
Pythium, which are fungus-like eukaryotic plant pathogens, are notorious for significant worldwide crop losses by causing damping off, seedling blights, root rots, foliar blights, or stalk rots across hundreds of plant species. Pythium propagates in various ecological niches by producing oospores, …
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Identification of Resistance to Pythium Root Rot in Maize
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2025-10-19 without embargo terms
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The Risk Of Pythium Aphanidermatum In Hydroponic Baby-Leaf Spinach Production
Pythium aphanidermatum has been identified as the main obstacle/risk in the production of hydroponically grown babyleaf spinach. This organism is so prevalent that even crops grown in fresh nutrient solution will often show signs of Pythium damage at harvest time. Previous studies have identified …
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The relative effectiveness of homeopathic preparations of pythium spp. compared to Previcur (Propamocarb), in the control of pythium root rot (damping off) in cabbage and cucumber seedlings
Dissertation submitted in part compliance with the requirements for the Master's Degree in Technology: Homeopathy, Technikon Natal, Durban, South Africa, 2002.
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Soybean-Pythium pathosystem: Search for host resistance and interaction with Fusarium species
… damping-off and root rot. Many species of Pythium and Fusarium cause seedling disease and are frequently recovered together from diseased soybean seedlings. Host resistance as a strategy to manage multiple pathogens has only briefly been explored in soybean and the interaction between these …
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Ecology and Management of Pythium species in Float Greenhouse Tobacco Transplant Production
Pythium diseases are common in the greenhouse production of tobacco transplants and can cause up to 70% seedling loss in hydroponic (float-bed) greenhouses. However, the symptoms and consequences of Pythium diseases are often variable among these greenhouses. A tobacco transplant greenhouse survey …
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Development of Pythium oligandrum drechsler for biological control of fungal soil-borne diseases.
… growth, oospore production and germination of Pythium oligandrum were examined. Optimum temperatures for growth of several isolates were in the range of 20 - 30 0 , with little growth occurring below 100 or above 350 Oospore germination occurred over the range of 10-35°. Both growth and oospore …
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Mechanisms of biological control of the damping-off fungus, Pythium ultimum, by binucleate Rhizoctonia / by K. Siwek.
This thesis investigates the mechanism(s) involved in the protection of Capsicum seedlings by two isolates of BNR against the damping-off fungus, P.u. sporangiiferum. Emphasis is placed on ecological attributes of the antagonists in relation to the pathogen, in conditions resembling those of the …
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Characterization, development of a field inoculation method, and fungicide sensitivity screening of the Pythium blight pathogen of snap bean (Phaseolus vulgaris L.)
… regions, but profitability is threatened by Pythium blight. Causal agents of Pythium blight on snap bean were identified using morphological characterization and sequence analysis of the rDNA-internal transcribed spacer (ITS) regions of 100 isolates. Most isolates were Pythium aphanidermatum …
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Identification of Pythium species inducing common bean (Phaseolus vulgaris L.) root rot symptoms and development of backcrosses to improve the level of varietal resistance to this disease
… pathogens depending on environmental conditions, Pythium spp. are the fungal pathogens most frequently associated with severe epidemics in eastern Africa. Studies on root rot have indicated that continuous cropping of beans, a common practice in eastern Africa, exacerbates the problem. This work …
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Characterization of oomycete species causing soybean diseases in Illinois and management applications
… US Midwest. Several species of Phytophthora and Pythium cause PRR and seedlings diseases, respectively. PRR is managed using cultivars with single resistance genes (Rps genes) in combination with seed treatments. In addition to Rps genes, cultivars with quantitative resistance or partial …
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Alteraciones en nascencia y enraizamiento de algunas plantas ornamentales de la Comunidad de Madrid
… Pythiaceae (85%) y, dentro de ella, el género pythium representó un 64% de los aislamientos. Las tres especies más frecuentemente encontradas fueron: Pythium irregulare Buisman (32%), Pythium paroecandrum Drechsler (21%>) y Pythium intermedium de Bary (13%), Mantenemos una micoteca de más de 50 …
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The Histology and Histochemistry of The Wound-Healing Process in Geranium Cuttings in Relationship to Basal Stem Rot Caused by Pythium Ultimum
… or fully rooted cuttings. Blackleg, caused by Pythium species, is a problem in geranium propagation. Cuttings of Pelargonium hortorum 'Yours Truly' were inoculated with an isolate of Pythium ultimum. Extensive basal stem rot occurred on all freshly broken cuttings. A restricted basal stem rot …
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Evaluation of Pythium root rot and damping off resistance in the ancestral lines of North American soybean cultivars and chemical control of the active ingredient ethaboxam in seed treatments
Effects of Pythium ultimum var. ultimum and other Pythium species on the North American Ancestral Soybean Lines A trend towards planting soybean (Glycine max (L.) Merrill) earlier in the growing season has made seedling diseases more prominent. A survey of biotic causes of yield loss between 2006 …
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Studies on the host range and chemical control of fungi associated with diseased tropical fish
… genera (<u>Saprolegnia</u>, <u>Achlya</u> and <u>Pythium</u>), were isolated from 11 fish species. Due to difficulty in inducing sexual fruiting, only two strains were identified to species; both of these being <u>A. americana</u>. Laboratory infection studies revealed the ability of strains of …
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Diagnóstico de los agentes causantes del mal seco en el cultivo del quequisque (Xanthosoma spp) en el municipio de Nueva Guinea, Nicaragua
… estéril donde se inoculó con los patógenos: Pythium myriotylum, Fusarium solani, Ralstonia solanacearum y Pythium myriotylum + Fusarium solani + Ralstonia solanacearum; los que fueron previamente aislados de raíces. Las variables evaluadas fueron frecuencia de aparición de patógenos y …
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Manejo de mal seco (Pythium myriotylum) en quequisque (Xanthosoma sagittifolium L. Schott) mediante la siembra tardia, control de arvenses, enmiendas organicas y trichoderma spp. en Nueva Guinea, Nicaragua
… que afecta el rendimiento es el mal seco ( Pythium myriotylum). Con el objetivo de evaluar el efecto de enmiendas orgánicas, Trichoderma y la siembra tardía en el manejo de mal seco ( Pythium myriotylum) en quequisque cv Blanco ( Xanthosoma sagittifolium (L.) Schott) en Nueva Guinea, se …
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Efecto del mal seco (Pythium myriotylum Drechs) en campo y sombreadero sobre la agromorfología de quince accesiones de quequisque (Xanthosoma spp) desarrollo de síntomas y detección microbiológica
… tiene como problema principal al mal seco ( Pythium myriotylum Drechs ) , que causa la pérdida total del rendimiento. Se establecieron cuatro ensayos para evaluar el efecto del mal seco sobre agromorfología de 15 accesiones de quequisque en suelos con (scams) y sin antecedentes de mal seco …
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The Development of a Thermodynamic Model for Antisense RNA Design and an Electro-transformation Protocol to Introduce Auxotrophic Genes for Enhancing Eicosapentaenoic Acid Yield from Pythium irregulare
… and Alzheimer's disease. The fungus Pythium irregulare (ATCC 10951) has great potential as a natural EPA producer. In this study, the electroporation conditions for P. irregulare were determined. The auxotrophic selectable genes ura, trp and his were respectively cloned into the …
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