TY JOUR TI INFLUENCE OF COPPER-CONTAINING AGROCHEMICAL ON GRAPE PRODUCTIVITY INDICATORS KW grapes (Vitis) KW copper-containing agrochemical KW biological efficiency KW productivity KW sugar content KW acidity of berries KW mildew JO Vestnik of Kazan State Agrarian University AU Arestova, N.O. AU Ryabchun, I.O. PY 2023 IS 18 PB Kazan state agrarian University