An evaluation of the H selection, through full-sib in them and their synthesis, was carry out, for resistance to Diatraea spp., in two corn varieties (ETO and DIACOL V. 351). The judgment of selection was the less number of holes from the insect exit, in pairs of plants, male and female, these last ones self pollennized. Under natural infestation, the effect of the selection system was studied in the damage caused by the insect, and in the correlate yield character, the femenine floration days, prolificity, ear corn height and plant stature. The advance was determined by the selection cycle of each one ot these characters under the regretion method, taking a relative percentage of each character in respect to the original variety, for each one of the synthesis level. Derived materials were obtained in which genes for the resistance to Diatraea spp., apparently were acumulated, and indirectly genes were qathered for other characters related to the yielding.