Published in Scientific Papers. Series B, Horticulture, Vol. LXVIV, Issue 1
Written by Iliyan ZHELYAZKOV
Weeds are competitive with cultivated plants, as for vines as well. They make harvesting, manual and mechanized operations, etc. difficult. The purpose of the present study, conducted in the area of the Varben village, Bulgaria, was to investigate the efficacy of herbicides and herbicide combinations on weed density and on productivity and yield elements in a vineyard, cultivar “Bolgar”. Variants of the experiment were: 1. Untreated control; 2. Economic control; 3. Two-time application of Ecopart Turbo (26.5 g/l pyraflufen-ethyl) - 0.08 L ha-1, without removing the young shoots from the stem; 4. Two-time targeted application of Ecopart Turbo - 0.08 L ha-1, with removing of the young shoots from the stem; 5. Double application of Roundup Classic Pro (360 g/l glyphosate) - 0.40 L ha-1 + Ecopart Turbo - 0.03 L ha-1. The highest yield in the economic control - 11.89 t ha-1 was reported, which represents a 54% higher yield than that of the untreated control. In the variants with herbicides, the highest yield - 11.69 t ha-1 in treatment 5 (Roundup Classic Pro -0.40 L ha-1 + Ecopart Turbo - 0.03 L ha-1) was recorded.
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