Scale

% Disease severity

Description

0

0.0

Leaves free from leaf spot

1

0% - 5%

0 - 5 per cent leaf area infected and covered by spots

2

6% - 20%

6 - 20 percent leaf area infected and covered by spots

3

21% - 40%

21 - 40 per cent leaf area infected and covered by spots

4

41% - 70%

41 - 70 per cent leaf area infected and covered by spots

5

>70%

>71 per cent leaf area infected and covered by spots