Historical Durability of Resistance to Wheat Diseases in Kansas

Fig. 2. Reaction of wheat cultivars Karl and Karl 92 to three foliar diseases and percentage Kansas hectarage planted to Karl and Karl 92. Disease ratings were on a 1-to-9 scale where 1 is highly resistant and 9 is highly susceptible.



Image from Crop Management article:
Historical Durability of Resistance to Wheat Diseases in Kansas