EFFECT OF GROWTH STIMULANTS ON GRAPEVINE SEEDLINGS’ GROWTH IN NURSERY

The purpose of the research is to establish the patterns of development of grapevine seedlings in nursery, depending on the methods of application and the active substance of plant growth regulators used to process rootstock grapevine cuttings. To set up the experiment, we used the graft grapevine variety Fioletoviy Ranniy, rootstock ‒ Kober 5BB. We studied the efficiency of rootstock vine soaking in solutions of the growth stimulator Epin and short-term treatment of copulation sections on grapevine cuttings with Epin, Kornevin and Symbionta stimulants. It was established that the treatment of rootstock cuttings with Epin's solution for 20 hours inhibits growth processes, has a negative effect on the growth of shoots and the development of the leaf surface. Short-term treatment of sections with Kornevin (0.003%) has a positive effect on the shoots maturation, compared to the control, the length of the matured vine increased by 10.9%, the leaf surface by 111.9 cm2.