Desenvolvimento de Pantoea agglomerans em diversas temperaturas, pH e concentrações de carboxi-metil-celulose e o seu impacto no controle de Rosellinia necatrix

Abstract

Rosellinia necatrix Prill induces the white root rot of apple, a disease that causes severe losses in orchards located in Southern Brazil. The management of the disease is mostly preventative and include usage of less susceptible rootstocks and soil fumigation. Protection of nursery apple trees before planting with an antagonistic bacterium Pantoea agglomerans was recently proposed to reduce the disease incidence. The aims of this research were to know about the pathogen-antagonic bacterium relationships and the effect of cell c o n c e n t r a t i o n s , p H , t e m p e r a t u r e a n d c a r b o x i m e t h y l cellulose(CMC) in the culture media on the growth of the pathogen, the antagonic organism and on the disease control.