variable_of attribute Estimation of the crown rust infection response. A qualitative analysis of the type of crown rust (Puccinia coronata f. sp. avenae) symptoms that are exhibited. Infection responses are limited to: Resistant (R): chlorotic fleck reaction with no sporulation. Moderately resistant (MR): Very small, non- or low-sporulating pustule surrounded by chlorosis. Moderately susceptible (MS): moderate to large pustule surrounded by extensive chlorosis, and. Susceptible (S): large pustule with little or no chlorosis. The following numerical scale has been used to quantify conventional notations of infection type: R= 0.2, R-MR= 0.3, MR= 0.4, R-MS= 0.45, R-S= 0.5, MR-MS= 0.6, MR-S= 0.7, MS= 0.8, MS-S= 0.9, S=1. Crown rust infection response is typically recorded in conjunction with crown rust severity. Crown rust infection response estimation method_of entity scale_of acronym