Significant differences in progeny numbers, weights and developmental periods of weevils were found among maize slections. Resistance to weevil attack increased through selection in dent types but not in flint types. Resistance was located in the pericarp, which is maternal tissue. In the nearly homozygous dent lines the pericarp and embryo are genetically similar. Lack of success in the selection for resistance in the flint sources is explained by the difference in genotypes between pericarp and embryo, as little inbreeding had occurred. Some degree of antibiosis was found in the endosperm.