Table 1 Wheat stem rust infection types used in disease assessment for seedling stage
From: A case study of non-traditional treatments for the control of wheat stem rust disease
Host response (class) | Infection type | Disease symptoms |
|---|---|---|
Immune | 0 | No uredia or other macroscopic sign of infection. |
Nearly immune | 0; | No uredia but hypersensitive necrotic or chlorotic flecks present. |
Very resistant | 1 | Small uredia surrounded by necrosis. |
Moderately resistant | 2 | Small to medium uredia surrounded by chlorosis or necrosis. |
Moderately susceptible | 3 | Medium-sized uredia that may be associated with chlorosis. |
Very susceptible | 4 | Large uredia without chlorosis or necrosis or rarely necrosis. |
Heterogeneous | X | Random distribution of different variable-sized uredia on single leaf. |