Use of Synthetic Cytokinin-Like Growth Regulators as Antistress Agents at Cucumber Cultivation in Greenhouses

The effect of synthetic analogues of cytokinins - cytodef and tidiazuron - on the growth, development and productivity of cucumber plants grown in protected soil was studied. Cucumber plants at the stage of 3-4 leaves were planted from garden pots into the ground and treated with cytodef solutions at concentrations of 10^-9-10^-6 M/l or tidiazuron at concentrations of 10^-11-10^-6 M/l. During vegetation, the timing of the passage of phenological phases was noted, the height of plants, the number of leaves, flowers (male and female), fruits (at the beginning of fruiting) were periodically changed. The productivity of cucumber plants was determined by means of periodic (after 1-2 days) collections. It was revealed that the treatment of young plants with different concentrations of drugs favorably affected the growth of cucumber; the best results were obtained at a concentration of tidiazuron 10^-8 M/l and cytodef - in doses from 10^-8 to 10^-6 M/l. Treatment of cucumber plants with cytodef and tidiazuron increased plant productivity and the yield of the fruits obtained. Under stressful temperature conditions, the preparations contributed to the better condition of the plants.