Examinando por Materia "Enfermedades de las plantas"

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Digital mapping tool: a territorial approach for containment of Fusarium wilt TR4 in Peru
(International Society for Horticultural Science, 2023-05-16) Clercx, L.; Cozzarelli, M.; Balarezo Camminati, D.; Rojas Llanque, Juan Carlos
Fusarium wilt caused by the tropical race 4 (TR4) of Fusarium oxysporum f. sp. cubense is known as the most serious and devastating banana disease. In April 2021 the presence of TR4 was detected on a plot in Chocán, in the district of Querecotillo in the Chira Valley, Peru. Organic banana cultivation for export is located in this valley, between Sullana and Piura, in Morropón and Lambayeque; altogether, 10,000 ha. There are two dozen mid-sized banana farms; but the export sector is mainly made up of approximately 9,000 small producers, with average plot sizes of 0.5-1.0 ha, organized in around 35 producer associations and cooperatives. To a great extent, the banana sector depends on flood irrigation. Harvesting is done by dozens of harvesting teams, who cut and carry banana bunches on their shoulder to one of the hundreds small packing stations, walking their shortest way through the banana plots. The export banana sector in Peru is small and young, with only an incipient institutional development and leadership. Typical biosecurity protocols to prevent entrance of the fungus are designed for farms; and need ‘re-invention’ for the highly fragmented context of Peru. All these characteristics make the sector extremely vulnerable to further spreading of TR4. Between April 2021 and June 2022, 82 TR4 outbreaks were detected by the phytosanitary agency SENASA in the districts of Querecotillo, Salitral and Marcavelica. Together with the data processing company Opus Insights, and in a broad alliance with other companies and institutions, the importer of Fairtrade and organic banana AgroFair started a project to carry out detailed aerial mapping, as tool for implementation of risk analysis and biosecurity measures with a territorial approach. The digital maps were completed in July 2022. We will examine the first practical experiences with this tool, formulate recommendations and indicate institutional conditions favorable to develop strategies for coping with TR4.
Draft genome sequence data of Fusarium verticillioides strain REC01, a phytopathogen isolated from a Peruvian maize
(Elsevier, 2024-09-23) Estrada Cañari, Richard; Aragón, Liliana; Pérez Porras, Wendy E.; Romero Avila, Yolanda; Martínez Vidal, Gabriel; García, Karina; Cruz Luis, Juancarlos; Arbizu Berrocal, Carlos I.
Fusarium verticillioides represents a major phytopathogenic threat to maize crops worldwide. In this study, we present genomic sequence data of a phytopathogen isolated from a maize stem that shows obvious signs of vascular rot. Using rigorous microbiological identification techniques, we correlated the disease symptoms observed in an affected maize region with the presence of the pathogen. Subsequently, the pathogen was cultured in a suitable fungal growth medium and extensive morphological characterization was performed. In addition, a pathogenicity test was carried out in a DCA model with three treatments and seven repetitions. De novo assembly from Illumina Novaseq 60 0 0 sequencing yielded 456 contigs, which together constitute a 42.8 Mb genome assembly with a GC % content of 48.26. Subsequent comparative analyses were performed with other Fusarium genomes available in the NCBI database.
Enfermedades en hortalizas
(Instituto Nacional de Investigación Agraria - INIA, 2001-09) Pariona J., Dora; Higaonna Oshiro, Consuelo; Matos Nonogawa, Luisa Betty
En el presente, hemos considerado las enfermedades que afectan a las hortalizas por grupos de familia, tratando de compendiar aquellas identificadas en nuestro medio por diversos investigadores aunados a experiencias propias. El texto comprende una breve descripción de las enfermedades, sus síntomas y medidas correctivas a tomar, pretendiendo con esto, ayudar a identificarlos.
Manejo técnico del cultivo de ají Páprika
(INIA. Estación Experimental Agraria Donoso - Huaral, 2009-05) Nicho Salas, Pedro Eduardo; Valencia Legua, Armando
La presente publicación proporciona información sobre el manejo tecnificado del cultivo de ají páprika,orientado a la obtención de altos rendimientos y producto cosechado de calidad para la exportación.
La rancha de la papa en Cajamarca, Phytophthora infestans
(INIA. Estación Experimental Agraria Baños del Inca - Cajamarca, 2008-08) Cabrera Hoyos, Héctor Antonio
Describe una de las enfermedades más importantes que afecta al cultivo de la papa porque en varias oportunidades la enfermedad ha alcanzado grandes proporciones y desastrosos debido a que el tizón tardío se disemina por esporas llevadas por el viento, esta enfermedad se desplaza rápidamente a través de las regiones productoras de papa. Es una problemática mundial que afecta por décadas a los agricultores del país en especial en Cajamarca.