Influence of Some Soil Herbicides on the Yield of Grafted Rooted Grapevines from Variety Misket Kaylashki and Their Biometric Characteristics

Abstract

During the period 2007 – 2009 in the Institute of Viticulture and Enology – Pleven a field trial was carried out in order to establish the influence of 6 soil herbicides on the production of grapevine planting material from variety Misket Kaylashki, grafted on rootstock Berlandieri × Riparia SO4. The herbicides Venzar 80 WP, Goal 2 Е, Devrinol 4 F, Dual Gold 960 EC, Lumax 538 SC and Stomp 33 EC were tested at different doses. The highest yield of grafted rooted grapevines was recorded for Dual Gold 960 EC – 0.3 l/da (54.4%). The treated variants (excepting Devrinol 4 F – 0.6 and 0.8 l/da, Lumax 538 SC – 0.4 l/da and Venzar 80 WP – 0.2 kg/da) exceeded the weeded control in this trait. In the process of the study no harmful effect of the tested herbicides on the grapevine root system and mature wood formation in their aboveground part was found. The greatest values of length and mass of the mature wood were recorded for the grapevines in the variants treated with Goal 2 E – 0.3 l/da, Venzar 80 WP – 0.2 kg/da and 0.3 kg/da and Stomp 33 EC – 0.8 l/da.