This study conducted artificial inoculation identification by international spinach downy mildew
physiological race identification system on 5 field samples of spinach downy mildew pathogen from Beijing，
Shandong and Shanxi．The results indicated that the 3 samples collected from Beijing were race No.9，the one from
Shanxi Province was typed out as race No.5，the one from Shandong Province was typed out as race No.8．These
results showed that there were different physiological races of spinach downy mildew in different regions of China.