Revista Mexicana de Fitopatología E-ISSN: 2007-8080 [email protected] Sociedad Mexicana de Fitopatología, A.C. México

Pérez-Rodríguez, Amado; Mora-Aguilera, José Antonio; De León-García de Alba, Carlos; Sandoval-Islas, José Sergio; Hernández-Castro, Elías; Vásquez-López, Alfonso Respuesta de diez cultivares de amarillo al daño por cenicilla (Erysiphe quercicola) en México Revista Mexicana de Fitopatología, vol. 36, núm. 2, may-aug, 2018, pp. 196-214 Sociedad Mexicana de Fitopatología, A.C. Texcoco, México

Available in: http://www.redalyc.org/articulo.oa?id=61257780001

Abstract Mango powdery mildew (Erysiphe quercicola) causes up to 90% production losses, so it is necessary to estimate the tolerance to this pathogen of the new germplasm introduced or recently generated to increase the export potential of Mexico. The objective of this study was to determine the response to powdery mildew damage by means of an optimized inoculation technique to induce the disease in attached leaves of 10 new yellow mango cultivars for Mexico. Two inoculation methods were evaluated. The best was to spray conidia at 4.6 x 105 spores mL-1 on the adaxial and abaxial leaves surfaces, at ± 300-450 lux and suspended in polysorbate 20 + surfactant based on ethoxilate alcohols at 2%. The inoculation test showed that the cv. was moderately tolerant and Neelum and were slightly tolerant. In contrast, Nam Doc Mai, , Ataulfo Zafiro, Cotaxtla and Kesar were susceptible and and were highly susceptible. The most tolerant cultivars had lower values of incidence, maximum severity, area under the disease progress curve, apparent infection rate and conidia density per cm2 of damaged leaf area (LSD, P0.05).

Keywords Leaves, susceptibility, germplasm, severity.

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