Table 1.

Leaf spot disease classification criteria in China.

Disease resistance level	Phenomenon of disease spot	Ratio of disease spot
1 (HR)a	None or only a few disease spots	≤5%
3 (R)b	Small number of disease spots	6–10%
5 (MR)c	Increased disease spots	11–30%
7 (S)d	Numerous disease spots	31–70%
9 (HS)e	Leaves die, basically all of them are disease spots	≥71%

^aHigh resistance,

^bresistance,

^cmedium resistance,

^ddiseased,

^ehighly diseased.