1. UC IPM
Pycnidial stage of pear rust, <i>Gymnosporangium libocedri.</i> The upper side of a pear leaf with powdery, reddish, fungal spores in the centers of two orange-colored leaf spots.
Pycnidial stage of pear rust, Gymnosporangium libocedri. The upper side of a pear leaf with powdery, reddish, fungal spores in the centers of two orange-colored leaf spots.
Credit: Robert D. Raabe