Resumo

QUINONES-VALDEZ, Rosalba et al. Spatial distribution of gladiolus rust (Uromyces transversalis) during spring-summer cycle in the southeast region of the state of Mexico. Rev. Fac. Cienc. Agrar., Univ. Nac. Cuyo [online]. 2016, vol.48, n.2, pp.209-220. ISSN 1853-8665.

Gladiolus rust, caused by Uromyces transversalis, affects foliage and reduces flower quality of Gladiolus spp.; this can lead to severe economic loss because of reduced yields, and even total crop loss. Spatial analysis studies of this disease are fundamental in order to plan strategies to manage crop health, improve sampling methods, and determine both current and potential production losses. The aim of this study was to analyze the spatial distribution of rust using geostatistical techniques in the municipalities of Ocuilan, Tenancingo and Villa Guerrero, in the southeastern region of the State of Mexico, during the spring-summer growing cycles of 2013 and 2014. The severity level of the disease was estimated at 121 georeferenced sampling points within each evaluated area. Gladiolus rust showed an aggregated spatial distribution in the different crop phenological stages during which it expressed throughout the two years of the study. The spatial dependency model was best described by the Gaussian model, followed by the spherical one.

Palavras-chave : Uromyces transversalis; Gladiolus; Semivariogram.

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