Table 2.

Symptom grading scale used in this study

Score	Symptom description
0	No visible symptoms; CaCV-inoculated plants show growth and development similar to that of mock-inoculated plants
1	Slight yellowing of the inoculated leaf; development similar to that of mock-inoculated plants
2	Some chlorotic spots in less than 50% of the inoculated leaf area; development similar to that of mock-inoculated plants
3	Chlorotic spots and/or interveinal chlorosis in more than 50% of the inoculated leaf area; no symptoms on systemic leaves
4	Chlorotic spots and/or interveinal chlorosis in more than 50% of the inoculated leaf area; yellowing starting to show on leaves right above the inoculated ones
5	Chlorotic spots, leaf curling and rugose appearance on systemic leaves; reduction in plant development
6	Very strong curling and rugose appearance, appearance of dark green islands in young systemic leaves; plant stunted