Relative Susceptibility of Selected Apple Cultivars to Powdery Mildew Caused by <i>Podosphaera leucotricha</i>

Fig. 5. Abaxial surface of an apple leaf showing signs of secondary powdery mildew infection.



Image from Plant Health Progress article:
Relative Susceptibility of Selected Apple Cultivars to Powdery Mildew Caused by Podosphaera leucotricha