TY JOUR TI ASSESSMENT OF THE PHYTOSANITARY SIGNIFICANCE OF THE MAIN PHYTOPHAGES AND PROBLEMS OF PROTECTION OF PEAR PLANTATIONS IN THE CENTRAL REGION OF THE NON-BLACK EARTH ZONE OF RUSSIA KW phytophages KW insects KW mites KW harmfulness KW phytosanitary significance KW pear (Pyrus communis L.) JO Vestnik of Kazan State Agrarian University AU Zeynalov, A.. PY 2022 IS 17 PB Kazan state agrarian University