Table 1.

Scoring scale used for visual assessment of CLS symptoms (Florimond Desprez, internal communication).

Score	Description
1	No CLS spots.
2	Spots on one leaf or two.
3	Spots multiplication.
4	Spots start to join on one plant or two.
5	Spots join on several plants but not on most of the row.
6	Spots join on most of the plants.
7	Some leaves are fully necrosed. Until 50% of leaf area is destroyed.
8	Just three or four healthy leaves remain on the plants.
9	All the leaves are necrosed.