F. Emurlova, A. Cholakova
Department of Plant Production, Faculty of Agriculture, Trakia University, 6000 Stara Zagora, Bulgaria
Abstract. The impact of biostimulants treatment on basic grape quality and wine of the Kaylashki Rubin variety in the period 2022-2023 has been studied. The biostimulants studied are from Agrological Dynamics Proserpina imported three times during the growing season. The results confirm statistically proven differences for the positive influence of (USB 20.20 at 2.5 l/ha, Resource Intense at 2.5 l/ha and Silecko at 0.5 l/ha) regarding the content of sugars and acid balance of grapes, higher anthocyanins and total phenolic content. The administration of biostimulants has contributed to overcoming the negative effects on vines caused by uneven rainfall and higher temperatures for the study period.