TY JOUR TI SUSCEPTIBILITY OF VARIETIES AND FORMS OF APPLE TREES BY SCAB IN THE REPUBLIC OF TATARSTAN KW apple KW scab KW variety KW elite form KW susceptibility KW variability KW correlation. JO Vestnik of Kazan State Agrarian University AU Osipov, G.. PY 2015 IS 10 PB Kazan state agrarian University