Ignacio ErreguerenaInstituto Nacional de Tecnología Agropecuaria | inta · Área de Protección Vegetal
Ignacio Erreguerena
Biologist
About
43
Publications
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34
Citations
Citations since 2017
Introduction
Barley Protection network, fungicide sensitivity, diagnosis, plant protection, fertilization effect on diseases, Wheat Protection, Pathogen variability, epidemiology
Publications
Publications (43)
Downy mildew (DM) of sunflower is a devastating disease caused by Plasmopara halstedii
(Farl.) Berl. and de Toni. In Argentina, the prevalence and incidence of DM has increased
in the last decade. The present study: i) compiles information from private and public
organisms to assess the race spectrum of DM and its evolution during the last three de...
Ramularia leaf spot (RLS) caused by the fungus Ramularia collo-cygni (Rcc) has become a threat to barley production in Argentina. All barley varieties are susceptible to RLS; thus, disease management relies on fungicides like quinone-outside inhibitors (QoIs), demethylation inhibitors (DMIs) and succinate dehydrogenase inhibitors (SDHIs). Europe re...
En Argentina, con más de un 90% de cultivos en siembra directa, el uso de los cultivos de cobertura (CC) aumentó significativamente donde más del 40% son gramíneas. En la región semiárida de Córdoba, la utilización de cereales invernales como CC, entre otros beneficios, permite el aprovechamiento del agua a la salida del verano (escasa en invierno...
The current management of diseases in barley in Argentina lies on the use on seed coated and foliar fungicides. In addition to causing a high impact on the environment, it generates selection pressure on pathogens causing resistance to fungicides. Integrated disease management (IDM) proposes strategies that include field rotation, host genetic resi...
Phosphites (F) (elicitors) are salts derived from phosphorous acid that combined with elements such as Ca2+, K+ and Mn2+; they activate defense mechanisms and promote plant growth, with a direct antifungal effect. Depending on the F used, they improve the absorption and assimilation of nutrients, tolerance to abiotic stress and performance. The F o...
a) Race determination of P. halstedii isolates Fig. 1. A= recovery of inoculum at field B= detail of leaf sporulation C= spore solution D= reinfection of differential set of sunflower inbred lines E= phenotyping and race determination. b) SSR analysis The isolates were analyzed by eight loci SSR. The number of alleles per locus (APL), the expected...
La roya amarilla (RA) de los cereales provocada por el hongo Puccinia striiformis Westend. sensu lato (sentido amplio); este hongo se puede dividir en cinco formas especiales (f. sp.) agropyri, elymi, hordei, secalis y tritici, asociadas al hospedante que infectan con mayor frecuencia. En la campaña 2020/21 en ensayos comparativos de rendimiento de...
Las enfermedades fúngicas causan pérdidas de rendimiento y de calidad en los granos de cebada, especialmente en las cebadas con destino a maltería. Existe un número acotado de variedades de cebada, las cuales en mayor o menor medida son susceptibles a alguna de las principales enfermedades que afectan a este cultivo (Moreyra y col., 2020). En el co...
One of the most prevalent foliar diseases in barley is net blotch spot form (NBSF), caused by the fungus Drechslera teres f sp teres. Seed, stubble, and alternative hosts (mostly grasses) are the main sources of inoculum of this disease varying in importance according to crop conditions. Currently, new seed-coated fungicides (FC) with carboxamides...
Oxathiapiprolin is an oomicide with a mechanism of action not previously used in Argentina. The objective was to determine the baseline sensitivity of Plasmopara halstedii isolates to oxathiapiprolin applied to sunflower seeds. Materials: isolates from Buenos Aires (5), Santa Fe (11) and Chaco (2), susceptible hybrid seeds DK4065. Treatments: 0 (Co...
Metalaxil-m ha sido históricamente el ingrediente activo más efectivo para el control de Plasmopara halstedii en girasol. Existen registros de pérdidas de sensibilidad de diferentes aislamientos en la Argentina. El objetivo fue determinar la sensibilidad de aislamientos de Plasmopara halstedii a metalaxil-m de regiones productoras de girasol de Arg...
Se discuten los posibles efectos de los cultivos de cobertura sobre los niveles de las enfermedades que afectan a los cultivos de producción agrícola poniendo énfasis en la necesidad de generar información local de manera integrada.
Estudio de Caso Multidisciplinario referido a la cosecha y poscosecha de maíz tardío.
Relevamiento de enfermedades en las diferentes variedades comerciales de cebada cervecera en Argentina en diversos ambientes de la produccion del cultivo. Survey of diseases in different commercial varieties of brewing barley in Argentina in various environments of crop production.
Parastagonospora nodorum agente causal del tizón por Septoria o del nudo y de la
gluma en trigo. Este puede producir síntomas en todos los órganos aéreos de la
planta; es decir, hojas, vainas, tallos, glumas y aristas. Se ha observado un aumento
en prevalencia de esta enfermedad reemergente a través de las últimas campañas
de trigo. En la actual ca...
Stillbirth and perinatal mortality with neurological signs and lesions were diagnosed in two calves following ingestion by their dams of corn infected with Stenocarpella maydis during the third trimester of gestation. Grossly, the brain and spinal cord were unremarkable. Microscopically, diffuse severe status spongiosis of the white matter
was dete...
The objective of this work was to find practical procedures to overcome methodological drawbacks encountered during studies on sunflower downy mildew. Techniques for recovering living isolates of Plasmopara halstedii from the field and for the preservation of infected leaf samples for further molecular analysis were developed. A Polymerase Chain Re...
Leaf mottle and wilt (LM) of sunflower caused by by Verticillium dahliae is the most important disease in Argentina. LM is a monocyclic disease where microsclerotia in soil are the primary inoculum source and have an important impact on symptom expression (incidence and severity) and yield. The inoculum (microsclerotia/g of soil) and disease relati...
La aplicación de fungicidas foliares es la principal estrategia de manejo en las variedades de trigo susceptibles a la roya amarilla (RA). El objetivo fue evaluar el efecto de la incorporación de carboxamidas a las mezclas dobles de fungicidas sobre el control de RA en trigo. El ensayo se realizó en un lote de trigo (variedad Algarrobo, Don Mario)...
Conventional field phenotyping for drought tolerance, the most important factor limiting yield at a global scale, is labor-intensive and time-consuming. Automated greenhouse platforms can increase the precision and throughput of plant phenotyping and contribute to a faster release of drought tolerant varieties. The aim of this work was to establish...
Average yield of the seven genotypes evaluated in dry (A) and wet (B) conditions in the field.
Phenotypic traits evaluated during the Experiment 1 with GlyPh and four criteria considered for the evaluation of phenotyping efficiency.
Characteristics of the 80 environments evaluated from the Argentinean National Trial Network of Soybean cultivars (RECSO) database.
Daily course of maximum and minimum values of temperature (°C), relative humidity (RH, %) and irradiation** (μmol/m2s *10) for experiment 1 (A), experiment 2 (B), and experiment 3 (C) in greenhouse during 57, 50, and 28 days after emergence (DAE), respectively. **Minimum values for irradiation were near zero for all experiments (data not shown).
Desde 2013 se observa un incremento de mildiu de girasol por Plasmopara halstedii en SE de Bs As y N de Santa Fé. Esto se atribuye a cambios genéticos del patógeno que confirieron tolerancia al curasemilla metalaxyl y/o superaron algunos genes Pl de resistencia de los híbridos cultivados. Ante este problema, se ha conformado una red compuesta por e...
Ramularia leaf spot (RLS) caused by Ramularia collo-cygni (Rcc), has become one of the main constraints to barley production in Argentina and Uruguay. Grain yield losses as high as 70% have been reported in susceptible cultivars. The emergence of RLS as a major disease in the last six years has redirected coordinated research efforts to advance on...
Plasmopara halstedii es un oomycete causante de una de las principales enfermedades del girasol, conocida como enanismo o mildiu. El uso de fungicidas curasemilla es una de las principales herramientas para su manejo. La aparición de variantes de P. halstedii tolerantes a metalaxil, ingrediente activo mayormente utilizado como curasemilla, hace nec...
Crop protection net against barley diseases.
Sunflower Downy Mildew in Argentina: State of art, fungicide resistance and disease management.
Las limitantes más importantes del cultivo de cebada para la región del sur bonaerense son la nutrición mineral y las enfermedades foliares, dos factores que inciden directamente sobre el rendimiento y calidad comercial del grano. Dentro de las enfermedades más prevalentes podemos enumerar dos grandes grupos, las enfermedades de suelo y las foliare...
Las enfermedades fúngicas causan pérdidas de rendimiento y de calidad en los granos de cebada, especialmente en las cebadas con destino a cervecería. Existe un número acotado de variedades con destino a cervecería, de las cuales en mayor o menor medida son susceptibles, al menos a alguna de las principales enfermedades que afectan a este cultivo. P...
La cebada es afectada por la Escaldadura (EC) producida por Rhynchosporium secalis, y el salpicado necrótico (SN) por Ramularia collo-cygni siendo enfermedades prevalente y emergente en el Sudeste Bonaerense, respectivamente. Ambas afectan el área foliar provocando pérdidas de rendimiento y calidad de grano. El control químico es una herramienta ef...
La diplodiosis es una neuromicotoxicosis, que ha sido reportada en Sudáfrica, Brasil y Argentina. Afecta a rumiantes que pastorean rastrojos de maíz contaminados con el hongo Stenocarpella maydis [Syn. Diplodia maydis]. Existen varios factores que predisponen la infección e invasión de los cultivos por parte del hongo. En general, todos aquellos qu...
Diseases caused by fungi in maize ears reduce the yields and affect the quality of harvested grain. In the 2011-2012 season of maize, ears from the eco-region of Cuenca del Río Salado (Buenos Aires province) were infected by Stenocarpella maydis. These crops had been used to feed beef cattle that showed neurological symptoms and death attributable...
Questions
Questions (2)
Hi all! I performed an AMOVA analysis with SSR markers in poppr R-package with three fungal pops (n=60, 30 and 21). My stratification levels are region (continent) and origin (Countries). DAPC, MSN and Differentiation index (Djost) showed clear differentiation at a region and origin levels although AMOVA is not significant at region level. Any information will be helpfull! Thanks!
Ignacio
Have a small pop of a fungal pathogen from two different years (n=10 per year). Although Genalex and other softwares allow me to perform the analysis how can I be sure if my results are reliable? Thanks in advance
Projects
Projects (8)
Estrategias de protección para el control de enfermedades del trigo basadas en criterios sustentables
Diagnosis of causal agent of chickpea blight in south Buenos Aires province, Argentina
-Survey of Cattle intoxication
-Diagnosis
-Forecast model
-Plant disease management
