The objective of this study was to evaluate the effect of the bioprotector Agrotrich® and the fungicide Vitavax-Thiram®, alone or combined, on the sanitary and physiological quality of soybean seeds, through assessments of health, germination, seedling evaluation , emergence in a greenhouse and in the field. The experiment was conducted at the Plant Pathology Laboratory and in the experimental area of the Department of Plant Health Defense at the Federal University of Santa Maria, from June to November 2007. In the seed health assessment, the treatments with chemical fungicide, alone or in combination, showed the lowest values of fungus incidence. For germination and first count, the treatment using half the dosage of the products obtained the best result. In the assessment of seedlings in a greenhouse, the treatments did not differ among themselves, for any of the variables, and nor for emergence, emergence speed index, first, second and third leaflet, in the field. In the analysis of correlation between the fungi and the physiological quality variables, a negative effect predominated. The combination of products at half the doses showed better effect on seed quality assessments.
Glycine max; biological control; plant pathogens; vigor
