Measurement of Faba Bean Diseases
3.2. Scale for Rating Chocolate Spot in the Detached Leaf Test
|
INFECTION
TYPES
|
HOST
STATUS
|
%
NECROSIS UNDER INOCULATING DROPLET
|
|
|
1
|
Highly
resistant
|
No infection or very small flecks (1-25% necrosis). | |
|
2
|
Resistant
|
Necrotic flecks with few small lesions (26-50% necrosis), and very poor sporulation. | |
|
3
|
Moderately
resistant
|
Medium coalesced lesions (51-75% necrosis) with intermediate sporulation. | |
|
4
|
Susceptible
|
Large coalesced lesions (76-100% necrosis) with abundant sporulation. | |
