In this research, the dose-dependence effect of tannins was evaluated under laboratory conditions, with the aim of providing a more environmentally friendly option that minimizes the use of conventional chemical control and prove the applicability of tannins as an alternative control method The specific objectives were to identify the effect of tannins on the feeding activity of the Colorado potato beetle, and to determine the most effective dose of tannins in controlling the Colorado potato beetle When we statistically evaluate the dynamic of the studied effect, we find that the higher concentrations have a significant negative effect on feeding activity compared to the control group already after 24 hours of diet. On the first day, the 0.4%, 0.8%, and 1.0% tannins had a significant effect, while this could not be proven in the case of the 0.6% treatment. The highest concentration was the most efficient.