How to Manage Pests

Pests in Gardens and Landscapes

Fungal Leaf Spots and the Hosts They Infect

Discula fraxinea, on ash
Elsinoe corni, on dogwood
Gloesporium quercum
, on oak
Apiognomonia veneta, on sycamore
Marssonia spp.
Aspen, Cottonwood, Poplar, Willow

Ascochyta spp.
Clematis, Gerbera daisy

Alternaria leaf spot (Alternaria alternata):
Geranium, Marigold, Pansy, Zinnia

Mycosphaerella spp.
Aspen, Cottonwood, Iris, Poplar, Rose
Cercospora spp.
Aspen, Cottonwood, Pansy, Poplar
Phyllosticta spp.
Andromeda, Aucuba, Begonia, Boxwood, Magnolia, Maple, Rhodedendron, Snapdragon, Zinnia
Curvularia leaf spot (Curvularia lunata, C. trifoli)
Ramularia spp.
Primrose, Sweet pea
Entomosporium leaf spot (Entomosporium spp.)
Apple, Flowering crab apple, Evergreen pear, Hawthorn, Pear, Photinia, Pyracantha, Quince, Rhaphiolepis, Serviceberry, Toyon
Scabs (Spilocaea and Venturia spp.)
Apple, Coffeeberry, Cottoneaster, Maple, Pear, Poplar, Pyracantha, Toyon, Willow
Fairy-ring leaf spot (Cladosporium (=Heterosporium) echinulatum)
Septoria leaf spot (Septoria spp.)
Aspen, Aster, Azalea, Carnation, Chrysanthemum, Cottonwood, Hebe, Poplar, Verbena
Fire spot (Heterosporium gracile)
Shot hole (Wilsonomyces carpophilus )
Prunus species such as Almond, Apricot, Plum
Ink spot (Drechslera or Bipolaris iridis)
Sphaceloma spp.
Leaf blotch (Cladosporium paeoniae)
Stemphylium leaf spot (Stemphylium spp.)
Macrophoma spp.
Tar spot (Rhytisma spp.)
Maple, Tulip tree, Yellow poplar

Statewide IPM Program, Agriculture and Natural Resources, University of California
All contents copyright © 2017 The Regents of the University of California. All rights reserved.

For noncommercial purposes only, any Web site may link directly to this page. FOR ALL OTHER USES or more information, read Legal Notices. Unfortunately, we cannot provide individual solutions to specific pest problems. See our Home page, or in the U.S., contact your local Cooperative Extension office for assistance.

Agriculture and Natural Resources, University of California

Accessibility   Contact webmaster.