The aim of field studies was to evaluate the effect of biostimulators on health and yield of bean. The study was conducted on the cultivar Berggold. The biopreparations encoded as OPT-101 and OPT-137 wer used at doses of: 2, 3 and 5 l/ha at two dates. Health observations was carried out during the bean harvest of bean leaf and pod infection by anthracnose was evaluated using a modified 5-point scale. The result of field observations showed that in the combinations with OPT-137 the infection of leaves was significantly lower in the first year of the study. In the second year of the investigations, there was no significance both in the infection leaves and pods was stated and the infection level of plants treated with biostimulators was reduced.
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