Schuck, E. Jobim, C.I.P. Lemos, E.C. Azeredo, J.A.D.
Ocorrencia de molestias em experimentos de girassol (Helianthus annuus L.)em dois locais do Rio Grande do Sul [Puccinia helianthi, Alternaria helianthi, Pseudomonas helianthi]
Disease occurrences on sunflower (Helianthus annuus L.)experiments in two places of Rio Grande do Sul, Brazil