The Coloardo beetle, (Leptinotarsa decemlineata), is one of the biggest pests of crops such as potatoes and tomatoes. Nowadays, there is a growing need to use methods without the use of pesticides in the suppression and control of pests such as potato blight. The use of chemical insecticides can have adverse effects on the environment, including those on soil, water, and wildlife. Environmentally acceptable methods enable pest control with a smaller ecological footprint. Chemical insecticides often contain toxic substances that can adversely affect the health of people who are exposed to these chemicals. Ecologically acceptable treatments reduce such risk. The aim of the research was to determine the toxicity of aqueous plant extracts on different stages of potato blight. Of the tested plant extracts, sage had the highest effectiveness after 48 hours, however, it was not statistically significant compared to the other two tested plant extracts. Of the examined plant extracts, the highest efficiency was recorded after 72 hours in the treatment of A. theophrasti and S. gigantea. Mortality in the mentioned two treatments with plant extracts after 72 hours was statistically significantly different compared to the control. A. theophrasti and S. gigantea showed slightly better gastric action compared to Salvia spp., however, the analysis of the results did not establish a statistically significant difference compared to the control, while Salvia spp. showed greater effectiveness in contact action, but these results were not showed statistically significant differences compared to the control and other plant extracts. The highest percentage of mortality due to oral administration was achieved with treatment with goldenrod, which is 0.60%, while the mortality percentage of 0.53% was achieved with the application of contact action with sage. Despite the focus of this research on ecological alternatives, the results indicate that the examined plant extracts do not represent an adequate substitute for chemical insecticides such as Laser. This highlights the need for further research and development of ecological treatments that will be equally effective, but with a lower ecological impact.