Abstract: Grape downy mildew （GDM）[Plasmopara viticola （Berk et Curt.） Burl. & de Toni] is the monitoring target, and the disease was investigated in five grape-producing regions in Liaoning Province. The result indicated that development trend of GDM spread rapidly during the past five years, the disease was a great threat in 2016, particularly. According to the epidemic characteristics and monitoring of GDM, the development trend and control strategy of GDM in the future were analyzed, which can provide references for the epidemic prediction and control of the disease.

Key words: grape downy mildew[Plasmopara viticola（Berk et Curt.） Burl. & de Toni], disease epidemic, development trend, control strategy