10. Biological Efficiency of Soil Herbicides in a Grapevine Nursery

During the period 2007-2010 the following herbicides were tested on grapevine nurseries at the Institute of  Viticulture and Enology – Pleven: Stopm 33 EK (doses of 0.6 and 0.8 l/da), Goal 2 E (doses of 0.2 and 0.3 l/da) and Lumax 538 CK (doses of 0.4 and 0.75 l/da) and the dynamics in the density of weeds was observed. The cultivar of the cuttings used was Kailashki Muscat grafted on a stock of Berlandieri x Riparia (CO4). After the stratification, they were planted with an uncovered paraffined part and grown in accordance with the technology used for the production of planting material which has been adopted by the Institute of  Viticulture and Enology. The herbicides were applied after planting the cuttings into the rootlings prior to the overhead irrigation.
Goal 2E in a dose of 0.3 l/da manifested a significant herbicide effect and a long-lasting influence. Lumax SK – 0.75 l/da showed a good selectivity and long-lasting persistence (up to 90 days after spraying). The field bindweed (Convolvulus arvensis L.) and the rough cocklebur (Xanthium strumarium L.) showed sensitivity toward all of the tested active substances.