Genetic control of common bean (Phaseolus vulgaris) resistance to powdery mildew (Erysiphe polygoni) was studied using segregating populations from the bean variety crosses Jalo x ESAL 686 and ESAL 550 x ESAL 686. F2 plants. together with the parents. were inoculated and evaluated using a scale of values from one (plant without symptoms) to nine (completely infected plant). https://www.nacrack.com/