Effects of some herbicides on the leaf apparatus of young vine (Vitis vinifera L.)

Neli Prodanova-Marinova, Yordanka Belberova and Emil Tsvetanov

Abstract: The study was carried out at the Experimental Base of the Institute of Viticulture and Enology, Pleven, Bulgaria. The soil type where the plantation was located was leached chernozem, formed on clay loess. Vines of Cabernet Sauvignon variety grafted to Berlandieri X Riparia Selection Openheim 4 (SO4) rootstock were used in the experimental work. The vines were planted in stages in the spring of 2015 and 2016. The objective of the study was to determine the impact of the herbicides Lumax and Gardoprim plus Gold in combination with Stratos Ultra on the leaf apparatus of grapevines during the first year after their planting. The treatment with Lumax and Gardoprim plus Gold was carried out on the soil, immediately after the formation of the protective piles, without incorporation, while with Stratos ultra between the thirties and the sixtieth day after that. The size of the leaf area was determined by the method proposed by Carbonneau and improved by T. Slavcheva.
Vines from the herbicide-treated plots had been found to form larger-sized leaves and had a larger leaf area than those grown on areas where weed control was only by mechanical removal. Deformities and changes in the coloration of the leaf blades as a result of the phytotoxic response were not observed. Of the factors, sources of variation during the study period (dose – A, herbicide – B and the combination between them – A+B), the set of active substances used for weed control was of the greatest significance for the obtained results, i.e. the factor – herbicide (B).

Keywords: herbicides; leaf area; newly-planted vineyard; vines

Date published: 2021-04-16