Abstract
Modern agriculture faces numerous problems, many of which are caused by the excessive use of synthetic pesticides to control pests. Development of a sustainable agriculture system is a priority for the Republic of Moldova, the main objectives being food security, protection of environment, support the competitiveness of local farmers on national and international market. Biological control proved to be a successful approach to the sustainable management of harmful insects. Thus, it is necessary to make continuous efforts to address the demand of business and national economy in environmentally friendly pesticide products. This study aimed to highlight new agents for biological control of insect pests based on local Bacillus thuringiensis (Bt) strains. Highlighted strains show promising results having a high insecticidal activity against lepidopteran (Lymantria dispar, Cydia pomonella and Archips rosana) and coleopteran (Neocoenorhinidius pauxillus, Phyllobius oblongus and Sitona lineatus) pest species. It therefore will allow local production of biopesticides, which will significantly reduce the final cost of the product, making it more accessible to farmers. Use of local Bt strains will also help avoid the ecological risks associated with the introduction of new organisms into ecosystems.
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