Redução de crescimento micelial in vitro no controle de Monilinia fructicola (Wint) Honey

Abstract

Peach is one of the main stone fruit trees with commercial interest in our country. It is an extremely perishable fruit and requires a lot of care in postharvest period since any injury can be a gateway for pathogens. Brown rot caused by Monilinia fructicola is an extremely severe disease because the fungus has a high capacity for infection and, as a consequence, a high economic loss in fruit transport. After the infection is established, the pathogen hyphae spread through the tissues and cause characteristic disease symptoms such as softening and darkening of the fruit. In order to reduce losses from this disease, chemical control is the most used today. Due to the damage caused, difficulties in control and toxicity of the chemicals used to handle the brown spot, the purpose of the present study was to evaluate the potential of pre-selected prokaryotic isolates in the in vitro biocontrol of the fungus Monilinia fructicola. The experiment was conducted at the Phytopathology Laboratory of the Federal University of Fronteira Sul, campus Cerro Largo / RS, using five bacterial isolates with potential for biocontrol (B01, B16, B27, RD34 and B82) and the phytopathogenic fungus M. fructicola. Towards assessing biocontrol potential, the method of culture pairing was used and mycelial growth and the percentage of inhibition of mycelial growth of the pathogen were evaluated. It was possible to observe that none of the isolates provided significant effects on the biocontrol of M. fructicola through the evaluated variables.