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Com o objetivo de avaliar a incidência de patógenos e o vigor de sementes de milho doce de diferentes classes de tamanhos submetidas a diferentes níveis de danos mecânicos, sementes do híbrido 'SWB551' Dow AgroSciences® foram classificadas em peneiras com crivos de diferentes tamanhos e formas (RG, RM1, RM2 e RP com crivos circulares de 8,7; 7,9; 7,1 e 6,4 mm de diâmetro, respectivamente, e CG, CM e CP com crivos oblongos com dimensões de 8,7 x 19,0, 7,9 x 19,0, 6,4 x 19,0 mm, respectivamente), submetidas a impactos contra uma placa metálica de maneira que fossem obtidos tratamentos com diferentes intensidades de danos mecânicos (0, 1, 3, 5 e 7 impactos) e armazenadas por 5 meses em ambiente com temperatura de 20ºC e 50-60% de umidade relativa do ar. Foi utilizado o delineamento inteiramente casualizado, com quatro repetições, perfazendo um fatorial 7 x 5 (7 peneiras x 5 intensidades de danos), totalizando 35 tratamentos. Foram realizadas as avaliações de teor de água das sementes, teste de danos mecânicos (tintura de iodo), teste de germinação, teste de frio e teste de sanidade. Foram evidenciadas variações nos níveis de incidência de patógenos entre as sementes de milho doce com diferentes tamanhos e formas. O aumento da intensidade dos danos mecânicos não favoreceu o aumento da incidência de patógenos nas sementes, mas reduziu o vigor das mesmas. The objective of this study was to evaluate pathogen incidence and vigor in different size classes of sweet corn seeds, after mechanical damage. Hybrid seeds 'SWB551' Dow AgroSciences® were classified by sieves with different sizes and forms (RG, RM1, RM2 and RP, with circular sieves of 8.7, 7.9, 7.1 and 6.4 mm of diameter, respectively, and CG, CM and CP with oblong sieves with dimensions of 8.7 x 19.0, 7.9 x 19.0, 6.4 x 19.0 mm, respectively). Seeds were submitted for impacts against a metallic plate in order to have different intensities of mechanical damage (0, 1, 3, 5 and 7 impacts) and stored at the temperature of 20ºC and 50-60% of relative humidity. The experimental design was a completely randomized with four repetitions, performing a factorial 7 x 5 (7 sieves and 5 damages intensities), totalizing 35 treatments. Seeds water content, mechanical damage (iodine dyeing), germination test, cold test and seed health test were evaluated. Variations in the incidence of pathogens among seeds with different sizes and forms were evidenced. Increasing mechanical damage did not favor increasing of pathogens incidence in seeds; however, it caused reduction on seed vigor

Incidência de patógenos e vigor de sementes de milho doce submetidas a danos mecânicos