Measurement of Faba Bean Diseases
3.6. Scale for Rating Stem Nematodes
|
DISEASE
RATING
|
HOST
STATUS
|
DESCRIPTION
|
|
|
1
|
Highly
resistant
|
No infection or very small swellings. | |
|
3
|
Resistant
|
Few stem infections on less than 20% of the plants. | |
|
5
|
Moderately
resistant
|
Stem and leaf swellings on 21-50% of plants. | |
|
7
|
Susceptible
|
Stunting, elongated brown necrotic stem swellings with moderate defoliation. 51-75% infected plants. | |
|
9
|
Highly
susceptible
|
Severe stunting, giant necrotic stem swellings, severe defoliation and flower drop with more than 75% plants infected or killed. | |
