Pacific Northwest Plant Disease Management Handbook
Printed page URL:
https://pnwhandbooks.org/node/415
Plant Disease
Host and Disease Descriptions
Host and Disease Descriptions
Reviewed: March 2023
Ivy (
Hedera helix
)-Leaf Scorch
Ivy (
Hedera helix
)-Leaf Spot and Twig Blight
Ivy, Boston or Grape
Hawthorn (
Crataegus
spp.)-Fire Blight
Hawthorn (
Crataegus
spp.)-Leaf Spot
Hawthorn (
Crataegus
spp.)-Powdery Mildew
Hawthorn (
Crataegus
spp.)-Rusts
Hawthorn (
Crataegus
spp.)-Scab
Hazelnut (
Corylus avellana
)-Armillaria Root Rot
Hazelnut (
Corylus avellana
)-Bacterial Blight
Hazelnut (
Corylus avellana
)-Blanks
Hazelnut (
Corylus avellana
)-Brown Stain
Hazelnut (
Corylus avellana
)-Catkin Blast
Hazelnut (
Corylus avellana
)-Eastern Filbert Blight
Hazelnut (
Corylus avellana
)-Kernel Molds
Hazelnut (
Corylus avellana
)-Leaf Spots
Hazelnut (
Corylus avellana
)-Mosses and Lichens
Hazelnut (
Corylus avellana
)-Mosaic
Hazelnut (
Corylus avellana
)-Powdery Mildew
Hazelnut (
Corylus avellana
)-Stunt (Dilly)
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