<p>A technological scheme for producing a biologically active polymer – chitosan, obtained Som pupae, silkworm and copper (II) has been developed. Optimal parameters of obtaining of 9–12% of copper-<br /> contained polymer metal complexes under the technological conditions at 22°C, pH=6, and the molar ratio Chit–NH2: Cu2+1:1 were identiTed. On the basis of this technology, 20 l polymeric form of Copprierchit preparation has been developed. Ue fungicidal and stimulating properties of the ecologically safe preparation of Copprierchit were studied in laboratory condition. Ue structure and composition of the obtained biopolymers were conTrmed by UV spectroscopy and elemental analysis. Ue results show that the polymer composition has high biological activity with 1% polymer metal complex and 0.5% polyacrylamide.</p>