[en] Sporisorium reilianum has caused significant economical damages in Mexico, in temperate and relatively dry areas, where maize is cultivated. The knowledge about the spatial distribution of this pathogen is basic to elaborate integrated management programs, and precise and efficient the development of sampling methods and control techniques. Unfortunately, in Mexico there are no studies on spatial behavior of this disease. For this reason, this study was developed to model S. reilianum spatial distribution by the year 2008; and also, to establish its spatial behavior with geostatistics techniques. The sampling method established 100 points for each of 30 locations of 27 municipalities in the State of Mexico. In each point, 500 plants were counted and those presenting symptoms of the disease were recorded. A geostatistical analysis was done in order to estimate the experimental semivariograms. It was adjusted to theoretical models (spherical, exponential or gaussian) with the program Variowin 2.2; later, it was evaluated through the crossed validation with the geostatistical interpolation method or kriging. Finally, aggregation maps of the disease were elaborated. The disease was found in 30 sampled locations; all of them presented an aggregated spatial pattern of the disease. Twenty one locations were adjusted to the spherical model, five to the exponential model and two to the Gaussian model. Aggregation maps were established in all models. It was observed that S. reilianum was not uniform in the assess areas. Results showed the spatial distribution of S. reilianum and real infestation in field using geostatistical techniques.

[es] Sporisorium reilianum causa da&ntilde;os econ&oacute;micos y ecol&oacute;gicos importantes en zonas con clima fresco y relativamente seco donde se cultiva ma&iacute;z en M&eacute;xico. El conocimiento de la distribuci&oacute;n espacial de la enfermedad es indispensable para la elaboraci&oacute;n de programas de manejo integrado, para el desarrollo preciso y eficiente de m&eacute;todos de muestreo y de t&aacute;cticas de control, pero se carece de estudios sobre su comportamiento espacial en M&eacute;xico. Se realiz&oacute; el presente trabajo para modelizar la distribuci&oacute;n espacial de S. reilianum en el a&ntilde;o 2008 y para establecer su comportamiento espacial con t&eacute;cnicas goeoestad&iacute;sticas. Se muestrearon 100 puntos por localidad, en 30 localidades de 27 municipios del Estado de M&eacute;xico. En cada punto se contabilizaron 500 plantas, registrando las que presentaban s&iacute;ntomas de la enfermedad. Se realiz&oacute; el an&aacute;lisis geoestad&iacute;stico para estimar el semivariograma experimental y &eacute;ste se ajust&oacute; a un modelo te&oacute;rico (esf&eacute;rico, exponencial o gaussiano) con el programa Variowin 2.2, y despu&eacute;s se someti&oacute; a la validaci&oacute;n cruzada con el m&eacute;todo de interpolaci&oacute;n geoestad&iacute;stica o krigeado y se elaboraron mapas de agregaci&oacute;n de la enfermedad. La enfermedad se present&oacute; en las 30 localidades muestreadas; todas ellas presentaron un comportamiento espacial agregado de la enfermedad, 21 se ajustaron al modelo esf&eacute;rico, 5 al modelo exponencial y 2 al modelo Gaussiano. En todos los modelos se establecieron mapas de agregaci&oacute;n y se observ&oacute; que S. reilianum no se distribuye uniformemente. Se logr&oacute; establecer la distribuci&oacute;n espacial de S. reilianum y su infestaci&oacute;n real en campo con el uso de t&eacute;cnicas geoestad&iacute;sticas.