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
Hazelnut (
Corylus avellana
)-Sunburn
Hazelnut (
Corylus avellana
)-Wet Feet
Hazelnut (
Corylus avellana
)-Witches' Broom
Hazelnut (
Corylus avellana
)-Wood Decay
Heather (
Calluna
spp.)-Root Rot
Heavenly Bamboo (
Nandina domestica
)-Mosaic
Heavenly Bamboo (
Nandina domestica
)-Powdery Mildew
Hebe (
Veronica
spp.)-Downy Mildew
Hebe (
Veronica
spp.)-Root Rot
Hebe (
Veronica
spp.)-Septoria Leaf Spot
Helleborus
-Black Death
Helleborus
-Winter Injury
Helleborus niger
(Christmas Rose)-Black Spot
Hemlock (
Tsuga
spp.)-Heterobasidion Root Disease
Hemlock (
Tsuga
spp.)-Armillaria Root Rot
Hemlock (
Tsuga
spp.)-Dwarf Mistletoe
Hemlock (
Tsuga
spp.)-Phytophthora Root Rot
Hemp (
Cannabis sativa
)-Powdery Mildew
Hemp (
Cannabis sativa
)-Rhizoctonia Soreshin and Root Rot
Hemp (
Cannabis sativa
)-Verticillium Wilt
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