The integration of methods for corn (Zea mays) seed protection may substantially reduce the use of pesticides in this crop, improving control efficiency and diminishing environmental pollution. Experiments were carried out under laboratory and field conditions in Passo Fundo, RS, Brazil, aimed at evaluating the effects of combining biological and chemical seed treatments for corn. The bioprotector used was Paenibacillus macerans (Embr. 144) and the chemical was a mixture of fludioxonil + metalaxyl-M. P. macerans, which significantly improved germination and grain yield of corn, showing increases similar to fludioxonil + metalaxyl-M. Seed germination and grain yield were significantly greater when P. macerans was applied in combination with fludioxonil + metalaxyl-M, even if both treatment rates were reduced to half. The combination of bioagent P. macerans with the fungicide fludioxonil + metalaxyl-M may have an important impact in reducing the use of fungicides, in achieving the sustainable agriculture and protecting the environment.
