Researchers from the Republic of Moldova jointly with those from the Republic of Belarus have conducted studies on the growing conditions in 2022 for the "Riviera" potato variety, assessing the influence of the consequences of unfavorable climatic factors on the formation of the photosynthetic potential and productivity of plants, the quantity and quality of the harvest. Thus, after the second decade of May 2022, at the USM's IGFPP potato lot, experiments were mounted according to the scheme: treatment with para-aminobenzoic acid (PABA) derivatives 10-2,10-4, 10-6 in complex with Bacillus thuringhiensis cousin. thuringhiensis (1.5x109UCF/ml) and control – water sprinkling in the variants of experiences. In-furrow and foliar treatments were applied to potatoes with para-aminobenzoic acid (PABA) derivatives 10-2, 10-4, 10-6 mixed with Bacillus thurigiensis var. thuringiensis. The biological activity of the derivatives of para-aminobenzoic acid (PABA)10-2, 10-4, 10-6 mol/l was determined in a mixture with Bacillus thuringhiensis var. thuringhiensis (1.5x109UCF/ml) in the experimental batch of potato for the development of biological plant protection products.