Microbiological analyses of bio-inputs propagated from Bacillus and Trichoderma in biofabrics at the region of Curitibanos – SC

Abstract

The development of Brazilian agribusiness has increasingly relied on the use of microorganisms in agriculture. With the growing demand for biologic products, many farmers began to multiply bacteria and fungi on their properties in biofactories, in a system known as on farm. However, these facilities lack of any sanitary control and this results in very low multiplication of the target microorganism and predominance of contaminants. In this context, the goal of the present work was to analyze the quality of products multiplied from Bacillus and Trichoderma-based products in the region of Curitibanos – SC. The analyses included aspects of pH, coloring and quantification of multiplied microorganisms, both those originating from the original product and contaminants, based on morphological characteristics of the colonies. Most of the samples did not present the microorganism that the producers wanted to propagate, and all samples analyzed presented contaminating microorganisms. Data reveal that multiplication from biofactories was not efficient in generating bioinputs with adequate quality and concentration. Those multiplied microorganisms, if used in agricultural areas, will contaminate soil, plants and possibly water resources, and pose a considerable risk to environmental as well as human health.

Key words: inoculants; on-farm system; biological control.