TY JOUR TI INVESTIGATION OF THE LEVEL OF RESISTANCE TO COPPER SULFATE AND STREPTOMYCIN OF THE ISOLATES OF Erwinia amylovora WHICH CAUSE FIRE BLIGHT DISEASE IN PEAR (Pyrus communis) IN THE WESTERN REGION OF AZERBAIJAN KW JO INTERNATIONAL AGRICULTURAL JOURNAL AU , .. PY 2024 IS 7 PB Electronic science