Microrganismo do alimento larval de abelha sem ferrão no controle de Meloidogyne incognita

Abstract

In general, crops can be affected by pests and diseases, with nematodes being particularly noteworthy for causing significant economic losses. Meloidogyne incognita is one of the main parasites that target economically important crops. Biological control has proven effective in reducing nematode populations, especially formulations based on fungi and bacteria. Thus, the objective of this study was to evaluate the nematicidal effect of the bacterium Mq-MCK-07 from the genus Providencia sp. on M. incognita. The experiment consisted of four treatments: 1 - plants without nematodes; 2 - plants with M. incognita; 3 - plants with M. incognita and bacterium Mq-MCK-07; 4 - plants with M. incognita and Nemat®. Ten vases were used for each treatment, totaling 40 plots. The experiment was dismantled 60 days after nematode inoculation. Dry mass of the aboveground plant parts and root mass were measured. Nematodes were extracted from the soil and roots, and the suspensions were examined for juveniles and eggs under a microscope using a Peters chamber. The evaluated parameters included root mass, dry mass, number of nematodes in the root, and number of nematodes per gram of root. Statistical analysis and data interpretation were performed using the Sisvar program with the Tukey test at a 5% significance level to assess the effectiveness of each treatment in controlling M. incognita. The results showed that the bacterium Mq-MCK-07 reduced the nematode population in the roots, demonstrating a nematicidal effect comparable to the commercial product Nemat®. However, genome sequencing of the bacterium is needed to identify the species and further tests is necessary to identify the mode of action.