Effect of biopreparations on seed germination and fungal contamination of winter wheat

The aim of the study was to investigate the influence of different biopreparations on the germination energy, germination and fungal infection of ecological winter wheat seeds. Germination energy and germination of winter wheat seeds were determined after 24, 480 and 960 h, while fungal infection after 24 and 960 h of their treatment. In the studies biopreparations Biokal 1 (10 l t^–1), Biokal 2 (10 l t^–1), Biojodis (2 l t^–1) and Penergetic-p for roots (100 ml t^–1) were used. It was found that the values of germination energy and germination of winter wheat treated with the biopreparations after 480 h increased by 4.45 and 0.62%, as compared to treated seeds after 24  h. After 960  h of treatment the value of germination energy, as compared to seeds treated after 480 h, decreased insignificantly, while the germination of seeds has reliably decreased by 0.84%, as compared to treated seeds after 24 h, the value of germination energy was by 3.45% higher, but no significant decrease in germination was ascertained. Biojodis after 24 h of the treatment was the most reliable in reducing wheat infection with the fungi of <i>Fusarium</i>, <i>Alternaria</i>, while Biokal 1 with <i>Penicillium</i> genera. The studied biopreparations after 960 h were insufficiently effective or had no influence at all on the development and spreading of fungi. The diseases of coleoptiles and roots of winter wheat after 24 h and 960 h were most reliably prevented by the biopreparation Biokal 2.