Rust Resistance Ratings of My Introductions
Click on any name in the list below to go to the information page for that introduction.
The chart below shows the rust resistance rating system that I used for the duration of my rust resistance screening program, which lasted for five summers - 2012 through 2016. My daylilies have two different evaluation considerations: 1.) Rust Resistance rating and 2.) the number of years the cultivar was tested. For more on my rust resistance testing program, click here.
Daylily Rust Resistance Rating System | |||
Grade | Lesion coverage | Resistance | Susceptibility |
A+ | 0% | Very high | No visible susceptibility |
A | 1% - 25% | High | Low |
B | 26% - 50% | Moderate | Moderate |
C | 51% - 75% | Low | High |
D | 76% | Very low | Very high |
Aladdin Sane - Rust Resistance: A+/1 year
Baalbek - Rust Resistance: A+/3 years
Butterscotch Queen - Rust Resistance: Unknown, produced after rust resistance screening program had concluded. pod parent was A+/5 years and pollen parent showed B-level resistance.
Cheddar Gorgeous - Rust Resistance: Unknown, produced after rust screening program had ended. Pod parent was a+/5 years, while pollen parent was consistently B-level through the four years it was in my screening program.
Elizabethan Courtly Love - Rust Resistance: A+/2 years
Elizabethan Sharp Wit - Rust Resistance: A+/2 years
Eternal Mist - Rust Resistance: Unknown, germinated after rust resistance screening program was completed. Both parents are A+, one A+/5 years and the other A+/3 years. Pollen parent also has extremely high thrips resistance, while pod parent had moderate thrips resistance.
Glacial Substance - Rust Resistance: A+/3 years
Glow Of The Heart - Rust Resistance: A+/3 years
Implausible Titan - Rust Resistance: A+/4 years
Solar Disk - Rust Resistance: A+/2 years
Stellar Princess - Rust Resistance: A+/1 year
Substance Of Sunlight - Rust Resistance: A+/3 years
Tomato Kimchi - Rust Resistance: A+/1 year
Vorlon Empire - Rust Resistance: A+/3 years
