Examinando por Materia "Phytophthora infestans"

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“Poderosa” variedad de papa para la sierra norte del Perú con resistencia a la rancha y buena calidad culinaria.
(Asociación Latinoamericana de Papa-ALAP, 2014-10-02) Otiniano, José; Cabrera, Héctor; Pérez, Juan Miguel; Sánchez, Henry; Gastelo, Manuel
El objetivo principal fue seleccionar un clon con resistencia a la rancha, altos rendimientos y buena calidad culinaria para ser liberado como una nueva variedad adaptada a la Sierra Norte del Perú.
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.
Rhizospheric actinomycetes from organic crops of native potato (Solanum tuberosum): isolation, phenotypic characterization, molecular identification, and impact on biocontrol of Phytophthora infestans (Mont.) de Bary
(Universidad Nacional de Trujillo, 2020-05-31) Chumpitaz Bermejo, Astrid; Caro Castro, Junior; Cruz Hilacondo, Wilbert Eddy; León Quispe, Jorge
Potato (Solanum tuberosum L.) is the fourth most consumed food crop in the world, whose production in Peru is diminished due to phytosanitary problems and high costs of chemical fertilizers. In the present work, 32 actinomycetes isolated from the rhizosphere of organic native potato crops collected in the town of Cabana, Lucanas, Ayacucho, were characterized phenotypically and evaluated for their in vitro antagonistic capacity against Oomycete phytopathogen Phytophthora infestans. The characterization tests showed that 97% of the actinomycetes were able to assimilate glucose, sucrose, and mannitol; as well as producing extracellular enzymes like amylases (100%) and cellulases (50%). Furthermore, the growth in laboratory culture was better in the range of pH 5.5-8.5 and temperature 28-30 °C. From the tests of antagonism in oat agar (71.9%) and rye agar (31.2%), three strains were selected according to the native potato variety were selected as CAB10-J2 (Ccompis), CAB9-CA4 (Cuchipa-akan) and CAB5-F5 (Futis) with pathogen inhibition rates of 80.05, 77.47 and 37.5% respectively. The strains were identified by molecular tests as members of the genus Streptomyces and owners of polyketide synthase (PKS) genes. It is concluded that the rhizospheric actinomycetes of potato are producers of bioactive compounds capable of remarkably inhibiting the pathogen Phytophthora infestans, being able to be considered candidates in biological control programs of the "potato blight".
“Shulay Papa”, nueva variedad de papa con calidad industrial y resistencia a efectos patogénicos del cambio climático
(Instituto Nacional de Innovación Agraria - INIA, 2012-09-20) Zúñiga López, Luz Noemí; Alfonso, R. L; Galván, E.; Camayo, N.
El artículo presenta los resultados de un conjunto de experimentos a fin de conseguir una nueva variedad de papa resistente al Phytophthora infestans Mont. de Bary, con calidad industrial y adaptabilidad en diversos climas.