THE SYNERGISM IN THE MIXTURES OF DIFFERENT FUNGICIDES WITH CYMOXANIL ON TWO KINDS OF DOWNY MILDEW Correlation among grape downy mildew epidemic rate, airborne sporangium density of Plasmopara viticola and environmental factors in Shenyang CROSS-RESISTANCE IN PSEUDOPERONOSPORA CUBENSIS AND PLASMOPARA VITICOLA AGAINST DIFFERENT SYSTEMIC FUNGICIDES TABLE GRAPEVINE RESISTANCE TO PLASMOPARA VITICOLA AND THE RESISTANCE MECHANISM The resistance heredity of Vitis vinifera to Uncinula necator and Plasmopara viticola Baseline sensitivity of Plasmopara viticola to iprovalicarb and characteristics of its iprovalicarb-resistant mutants Resistance management and inheritance stability analysis of resistant strains of Plasmopara viticola to metalaxyl in the field