Fruit growing
and viticulture of South Russia

Annotation

The paper presents the results of a vegetation experiment to study the effect of VL 77 on the regenerative capacity of two-buds cuttings of Moldova variety. The cuttings were soaked for 24 hours in working solutions of the studied preparation at concentrations of 0.005; 0.01; 0.05; 0.1 and 0.5 %. The cuttings of the control variant were soaked in water for the same time, and the cuttings of the standard variant were soaked in a 0.01 % IAA solution. The cuttings were germinated in plastic containers filled with water. The use of VL 77 had a positive effect on growth processes, increasing the length of the shoots by 1.8-5.0 cm or 43.9-122.0 %. A clear pattern of a decrease in the average length of shoots with an increase in the concentration of the drug from 0.005 to 0.5% was revealed. The highest intensity of opening of eyes, and the degree of their opening, as well as the highest total growth, were characteristic of cuttings in the variant with a concentration of the studied drug of 0.005%. Treatment of cuttings with VL 77 led to a significant improvement in virtually all the main indicators of their root-forming ability: rooting rate, length of the pre-root period, yield of cuttings with three roots or more, the number of roots, their total length. The greatest effect was obtained with the use of 0.005 % concentration of VL 77. In this variant, rooting increased by 18.5%, the proportion of cuttings with three roots or more by 32.5 %, the average number of roots of the cuttings by 39.6%, root length 4.1 times. The length of the pre-root period decreased by 4.5 days. Thus, the tested drug VL 77 can be attributed to effective stimulators of the regenerative capacity of grapevine cuttings.