Eficiência de fungicidas no tratamento de sementes de milho visando o controle de Fusarium moniliforme e Pythium sp.

The efficiency of the fungicides Captan, Thiran, Thiabendazole, Quintozene and Etridiazole + Quintozene in the treatment of BR 106 maize seeds to control Fuzarium moniliforme and Pythium sp. was studied. Seed health, seedling emergence in sterilized soil, germination, vigor, field emergence, and emergence in the cold tests in a maize monoculture and in a soil infected with Pythium sp. or with Fusarium moniliforme were evaluated. Captan and Thiram promoted higher control of Fusarium moniliforme in the seed, higher seed viability, and more emergence in cold tests in a soil with monoculture or infected with Pythium sp. In a soil infected with Fusarium moniliforme, Thiabendazole and Captan were the most efficient. No benefit was shown by the fungicide treatment for germination nor for emergence in field or in sterilized soil. It was concluded that Captan and Thiram were efficient to control Fusarium moniliforme; Thiabendazole and Etridiazole + Quintozene were efficient to control Fusarium moniliforme and Pythium sp.Estudou-se a eficiência dos fungicidas Captan, Thiram, Thiabendazole, Quintozene, e Etridiazole + Quintozene no tratamento de sementes de milho BR 106, visando o controle de Fusarium moniliforme e Pythium sp. Foram avaliados os parâmetros sanidade de sementes, emergência de plântulas em solo esterilizado, germinação, vigor, emergência no campo, e a emergência nos testes de frio em solo com monocultivo de milho e em solo infectado com Pythium sp. ou com Fusarium moniliforme. O Captan e Thiram promoveram maior controle de Fusarium moniliforme nas sementes, maior viabilidade das sementes, e mais emergência nos testes de frio em solo de monocultivo ou infectado com Pythium sp. Em solo infectado com Fusarium moniliforme, o Thiabendazole e Captan foram os mais eficientes. Não houve benefício do tratamento fungicida para a germinação e para a emergência no campo ou em solo esterilizado. Conclui-se que os fungicidas Captan e Thiram foram eficientes no controle de Fusarium moniliforme e o Thiabendazole e a mistura Etridiazole + Quintozene foram eficientes no controle de Fusarium moniliforme e Pythium sp