Annals of the University of Craiova - Agriculture, Montanology, Cadastre Series
Abstract
The research carried out during the period 2018-2019 at Dabuleni Research Development Station for Plant Culture on Sands (Dabuleni RDSPCS) underlines the importance of the herbicide work on the sorghum crop for grains, placed under the conditions of sandy soils. The products were tested: Trek P34 SE (pendimethalin 64 g / l + terbuthylazine 270 g / l), in doses of 2.5 l / ha and 3.5 l / ha, Gardoprim Plus Gold 500 SC (S-metolachlor 312, 5 g / l + terbuthylazine 197.5 g / l), in a dose of 1 l / ha, Universal Buctril (bromoxynil 280 g / l + 2,4-D acid (ester) 280 g / l), in a dose of 1 l / ha, Dicopur Top 464 SL (344 g / l 2.4 D acid from DMA salt and 120 g / l dicamba), in a dose of 1 l / ha and Dual Gold 960 EC (960 g/l S-metolaclor), in a dose of 1,5 l/ha. The spectrum of weeds recorded in the untreated variant is highlighted by the abundant presence of the species Ambrosia artemisiifolia, in 48.9%, followed by Digitaria sanguinalis (29.6%), Portulacca oleraceaea (12.2%) and Chenopodium album (9.3 %). The EWRS ratings, regarding the weed degree in the untreated variant, underline high values throughout the vegetation period, the grades being in the range 6-9, with an average of 7.88. Compared to this variant, the application of herbicides ensures a weed control, for the period 15-60 days after application, in a percentage of 50.8-71.4%. The obtained results show that the best control over the weed degree in the sorghum culture was achieved by the post-emergent application of the product Trek P34 SE, at a dose of 3, 5 l / ha, the production of grains obtained at harvesting being 7333.5 kg / ha, compared with the non-herbicide control, in which 3070.5 kg / ha were registered
