BIOCONTROLE DE Burkholderia seminalis SOBRE Meloidogyne enterolobii

Abstract

Nematodes are organisms responsible for large losses in productivity, the chemical control method was one of the most used means until then, however, due to their persistence and toxicity, alternative methods with lower impact have been sought nowadays. In this context, techniques such as biological control have gained ground and proven to be efficient. Bacteria and fungi are the natural enemies of nematodes that have the greatest potential as biological control agents. Some rhizobacteria have the ability to parasitize and/or produce metabolites that interfere with the reproduction, laying and hatching of eggs, the survival of the initial stages of nematode development and/or the mortality of adult individuals. Burkholderia seminalis is a rhizobacteria that has been used in various segments of agriculture, such as bioremediation, growth promoter and fungal control, however, there are still no studies on its effect on nematodes. Therefore, the objective of this work is to evaluate the biocontrol potential of Meloidogyne enterolobii from the rhizobacteria Burkholderia seminalis. The work was developed at the Instituto Federal Goiano – Campus Ceres, which also granted the use of the bacterial strain used during the tests. The M. enterolobii inoculum was donated by the nematology laboratory at IF Goiano- Campus Morrinhos and multiplied in the eggplant culture. The assays used five different bacterial concentrations with five replications each, namely: T1 = 0 mL, T2 = 1 mL, T3 = 3 mL, T4 = 6 mL and T5 = 9 mL, and each sample unit had a fixed number of 120 eggs. Assessments took place over 24 hours, 48 hours and 72 hours. After the evaluations, it was observed that the T3, T4 and T5 treatments showed ovicidal action against Meloidogyne enterolobii eggs, where the T5 treatment showed the best results.