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How to Manage Pests

Pests in Gardens and Landscapes

Trees and shrubs not reported to be susceptible to Phytophthora cinnamomi

Common Name Genus Name
albizia Albizia
alder Alnus
apple1 Malus
ash Fraxinus
aspen Populus
box elder Acer
California bay2 Umbellularia
California buckeye2 Aesculus
cotoneaster3 Cotoneaser
cottonwood Populus
coyote brush Baccharis
elm Ulmus
euonymus Euonymus
honey locust Gleditsia
linden Tilia
madrone1,2 Arbutus
magnolia Magnolia
maidenhair tree Ginkgo
mayten Maytenus
oleander Nerium
podocarpus Podocarpus
poplar Populus
sweet gum Liquidambar
tamarisk Tamarix
toyon1,2 Heteromeles
tulip tree Liriodendron
zelkova Zelkova

This list provides only a guideline; host vigor and environmental conditions are important in disease development. Some hosts are susceptible to other Phytophthora species.

1. Susceptible to Phytophthora cactorum.
2. Susceptible to Phytophthora ramorum.
3. Susceptible to Phytophthora cryptogea and P. parasitica.

Sources. Farr, D.F., G.F. Bills, G.P. Chamuris, and A.Y. Rossman. 1989. Fungi on Plants and Plant Products in the United States. St. Paul, MN: American Phytopathological Society.
Ohr, H.D., G.A. Zentmyer, E.C. Pond, and L.J. Klure. 1980. Plants in California Susceptible to Phytophthora cinnamoni. Oakland: Univ. Calif. Agric. Nat. Res. Publ. 21178.

Statewide IPM Program, Agriculture and Natural Resources, University of California
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