Numbered Publications by Eshenaur, Brian Publications by Brian Eshenaur PPFS-GEN-2: Powdery Mildew Brian Eshenaur, John Hartman | Aug. 1, 2004 (Minor Revision) Powdery mildew may affect numerous ornamentals, fruits, vegetables, and agronomic crops. In Kentucky, mildew diseases are most commonly observed on apple, begonia, crabapple, cherry, dogwood, lilac, phlox, pin oak, rose, sycamore, tuliptree, turfgrass, zinnia, squash, pumpkin, cantaloupe, wheat and barley.