Reis, E.M. Denardin, J.E. Kochhann, R.A. Flutuacao populacional de Cochliobolus sativus no solo em funcao de sistemas de preparo do solo Fluctuation of Cochliobolus sativus propagules in the soil related to systems of soil tillage Subjects--Topical Terms: TRIGOCEVADATRITICALECENTEIOHELMINTOSPORIOSEPLANTIO DIRETOINOCULACAO