Measurement of Faba Bean Diseases
3.3. Scale for Rating Ascochyta Blight
|
DISEASE
RATING
|
HOST
STATUS
|
DESCRIPTION
|
|
|
1
|
Highly
resistant
|
No lesions or very small nonsporulating resistant flecks (less than 0.5 mm in diameter). | |
|
3
|
Resistant
|
Few small, discrete, dark, non-sporulating lesions on leaves (1-2 mm in diameter), sometimes with hypersensitive reaction. | |
|
5
|
Moderately
resistant
|
Some discrete, circular lesions with a moderate number of pycnidia on leaves and pods. | |
|
7
|
Susceptible
|
Many
large, coalesced irregular lesions with many pycnidia on leaves, pods,
and stems. |
|
|
9
|
Highly
susceptible
|
Extensive, large, coalesced, irregular lesions with many pycnidia on leaves, pods, and stems, stem constriction and girdling with many plants dead. | |
