Andrés D. Sanabria-Velázquez
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View article: Impacto de los fungicidas en el manejo de la roya asiática de la soja en países productores de América del Sur: un estudio sistemático
Impacto de los fungicidas en el manejo de la roya asiática de la soja en países productores de América del Sur: un estudio sistemático Open
Asian soybean rust (ASR), caused by the fungus Phakopsora pachyrhizi, significantly reduces crop yield and leads to increased costs associated with fungicide application. A comprehensive literature review was conducted covering the period …
View article: Beyond sweetness: Rethinking the use and conservation of <i>Stevia rebaudiana</i> ’s plant genetic resources for breeding
Beyond sweetness: Rethinking the use and conservation of <i>Stevia rebaudiana</i> ’s plant genetic resources for breeding Open
This work analyses the genetic potential of Stevia rebaudiana beyond its sweetening properties, aiming to reassess its conservation and utilization in breeding programmes. This focus is justified by the growing global demand for natural sw…
View article: Biological control of Sclerotium rolfsii Sacc. in Stevia rebaudiana using native isolates of Trichoderma spp. from Paraguay
Biological control of Sclerotium rolfsii Sacc. in Stevia rebaudiana using native isolates of Trichoderma spp. from Paraguay Open
Stevia, Stevia rebaudiana [(Bertoni) Bertoni], is cultivated in Paraguay as a natural, non-nutritive sweetener, but yields are reduced because of wilting and plant death caused by the fungal pathogen Sclerotium rolfsii. This study aimed to…
View article: First report of Bemisia tabaci (Gennadius, 1889) (Hemiptera: Aleyrodidae), biotypes B and Q, in soybean Glycine max (L.) Merrill (Fabales: Fabaceae) in Paraguay
First report of Bemisia tabaci (Gennadius, 1889) (Hemiptera: Aleyrodidae), biotypes B and Q, in soybean Glycine max (L.) Merrill (Fabales: Fabaceae) in Paraguay Open
Whiteflies (Hemiptera: Aleyrodidae) are significant agricultural pests worldwide, primarily because they act as vectors for various plant viruses, including geminiviruses. Additionally, whitefly activity fosters the development of fungal c…
View article: First report of <i>Parastagonospora nodorum</i> causing Septoria nodorum blotch of wheat in Paraguay
First report of <i>Parastagonospora nodorum</i> causing Septoria nodorum blotch of wheat in Paraguay Open
In 2021 and 2022 wheat plants (Triticum aestivum cv. Itapúa-80) were observed with necrotic spots on the leaves surrounded by a chlorotic halo (Fig. 1a-b) and discolouration of the glume with the presence of pycnidia (Fig. 2a-c) in Capitán…
View article: Characterization of Trichoderma species from agricultural soils of Paraguay
Characterization of Trichoderma species from agricultural soils of Paraguay Open
There is a growing interest in the development of sustainable alternatives to the use of chemical pesticides for pest management in agricultural systems. This research aimed to isolate and characterize native strains of Trichoderma spp. fr…
View article: Promoción de la investigación y el conocimiento científico en veterinaria y agronomía en Paraguay. Vol. 14, Núm. 1 - Tópico Ciencias Agrícolas y Veterinarias (2023): Revista Investigaciones y Estudios-UNA
Promoción de la investigación y el conocimiento científico en veterinaria y agronomía en Paraguay. Vol. 14, Núm. 1 - Tópico Ciencias Agrícolas y Veterinarias (2023): Revista Investigaciones y Estudios-UNA Open
View article: Diagnosis and integrated management of onion wilt caused by Fusarium sp.
Diagnosis and integrated management of onion wilt caused by Fusarium sp. Open
Onion wilt is an endemic disease in producing farms of Michoacán, Mexico that can reduce yields up to 25-30%. From onion plants with wilting symptoms, a monosporic isolate of the fungus Fusarium spp. was obtained, and its pathogenicity was…
View article: Integrated Pathogen Management in Stevia Using Anaerobic Soil Disinfestation Combined with Different Fungicide Programs in USA, Mexico, and Paraguay
Integrated Pathogen Management in Stevia Using Anaerobic Soil Disinfestation Combined with Different Fungicide Programs in USA, Mexico, and Paraguay Open
Stevia is a semi-perennial crop grown to obtain the diterpene glycosides in its leaves, which are processed to manufacture non-caloric sweeteners. Anaerobic soil disinfestation (ASD) and fungicide application were evaluated for the managem…
View article: Field screening of Paraguayan soybean germplasm for resistance to charcoal rot
Field screening of Paraguayan soybean germplasm for resistance to charcoal rot Open
The aim of this work was to identify genetic resistance to charcoal rot (Macrophomina phaseolina) in soybean germplasm from the National Breeding Program of the Instituto Paraguayo de Tecnología Agraria (Paraguayan Institute of Agricultura…
View article: Evaluation of Anaerobic Soil Disinfestation for Environmentally Sustainable Weed Management
Evaluation of Anaerobic Soil Disinfestation for Environmentally Sustainable Weed Management Open
In anaerobic soil disinfestation (ASD), soil amended with a carbon source undergoes anaerobic conditions accompanied by changes in microbial community composition and an increase in the concentration of organic acids, primarily acetic and …
View article: Efecto de la época de siembra y diferentes programas aplicación de fungicidas sobre la severidad de la roya asiática de la soja
Efecto de la época de siembra y diferentes programas aplicación de fungicidas sobre la severidad de la roya asiática de la soja Open
Se evaluó el efecto de 11 programas de aplicación de fungicidas (PAF) con diferentes modos de acción junto a un testigo en intervalos de aplicación de 15 a 18 días, en dos épocas de siembra (S): temprana (S1) y tardía (S2) en las Colonias …
View article: Una carrera contra la pérdida de la eficacia de fungicidas : 20 años de manejo de la roya asiática de la soja en Paraguay
Una carrera contra la pérdida de la eficacia de fungicidas : 20 años de manejo de la roya asiática de la soja en Paraguay Open
La roya asiática (RAS) (Phakopsora pachyrhizi) es la enfermedad más importante de la soja en Paraguay. Este patógeno ocasiona grandes pérdidas de la producción si no se toman las medidas adecuadas. Las primeras epidemias de RAS en Paraguay…
View article: Soybean yield components at different densities and planting seasons in Paraguay
Soybean yield components at different densities and planting seasons in Paraguay Open
The aim of this research was to evaluate the performance of soybean cultivars using different population densities and planting seasons. The experiments were established using a completely randomized block design with a 14×3×2 factorial ar…
View article: Anaerobic Soil Disinfestation Reduces Viability of <i>Sclerotinia sclerotiorum</i> and <i>S. minor</i> Sclerotia and Root-Knot Nematodes in Muck Soils
Anaerobic Soil Disinfestation Reduces Viability of <i>Sclerotinia sclerotiorum</i> and <i>S. minor</i> Sclerotia and Root-Knot Nematodes in Muck Soils Open
Experiments were conducted to evaluate potential functional and mechanistic differences in the suppression of Sclerotinia sclerotiorum and S. minor and root-knot nematodes in muck soils by anaerobic soil disinfestation (ASD) using differen…
View article: Effects of Anaerobic Soil Disinfestation on <i>Sclerotinia sclerotiorum</i> in Paraguay
Effects of Anaerobic Soil Disinfestation on <i>Sclerotinia sclerotiorum</i> in Paraguay Open
The effects of anaerobic soil disinfestation (ASD) on Sclerotinia sclerotiorum sclerotia viability was tested in four field trials in Paraguay. Plots were amended with wheat bran (20.2 Mg/ha), molasses (10.1 Mg/ha), or wheat bran (20.2 Mg/…