Influence of presowing treatment of seeds by growth regulators and fungicides on field similarity of Zinnia elegans

Abstract

The article discusses the effect of presowing seed treatment by growth regulators and fungicides on the field germination of seeds of two grades of zinnia elegant – Dream and Orange King. Varieties differed in seed germination time. On average, over three years, Zinnia Dream seeds germinated 0.5–1.0 days earlier than Orange King seeds. The treatment of zinnia seeds with an epin-extra growth regulator contributed to the emergence of earlier seedlings. When the seeds were soaked with a solution of this preparation, the plants went through the sprouting phase faster – the period when they are most sensitive to abiotic stresses. Zircon had a weaker effect on the germination rate of zinnia seeds than epin-extra, however, the presence of a prolonged action of this drug in the activation of non-specific resistance of plants to stress factors can also be noted. The one-component disinfectant benorad turned out to be the most passive and did not significantly affect the germination of zinnia. There were no visible signs of manifestation of pathogens in the juvenile period of plants, and its active substance (benomyl) could hardly affect the rate of emergence of seedlings. In contrast to benorad, the two-component protectant vial TrasT had a weak positive effect on the rate of emergence of seedlings, since it included specially introduced anti-stress components.