Resumen

POULSEN HORNUM, M; RIDAO, A  y  CASTANO, F. Comparación entre técnicas de inoculación de Fusarium verticillioides en espigas de maíz. RIA. Rev. investig. agropecu. [online]. 2013, vol.39, n.3, pp.312-317. ISSN 1669-2314.

Inoculation techniques (TI) of Fusarium verticillioides on corn ears were compared through the incidence (I%) and severity (S%) showed by 15 cultivars. Experimentation was carried out in Camet (Gral. Pueyrredón, Buenos Aires), during 2006/07. The TI were: 1) aspersion of an aqueous inoculum (SI) onto the silk (ASE); 2) injection of SI into the silk channel (ICE), 3) insertion in the mid-ear of a toothpick colonized with mycelium (IE), 4) control without inoculation (C). No interaction hybrid x TI and variability among hybrids were found for S%. Inoculations caused more severe symptoms than C. For I% the interaction hybrid x TI was significant, suggesting that I% produced by TI depended on the hybrids. IE method produced the highest I% overall hybrids. A correlation was found in the hybrids' order according to I%, when the data for the natural infection 2006/07 and ASE, ICE and C were compared. Although ASE showed the best simulation of a natural infection, ICE would permit the best evaluation of differences in F.verticillioides attack on ears.

Palabras clave : Zea mays; Ear corn rot; Hybrids; Inoculation.

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