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
Rhododendron-Sunburn
Rhododendron-Tissue Proliferation
Rhododendron-Witches' Broom
Rhubarb (
Rheum rhabarbarum
)-Gray Mold
Rhubarb (
Rheum rhabarbarum
)-Leaf Spots
Rhubarb (
Rheum rhabarbarum
)-Red Leaf
Rhubarb (
Rheum rhabarbarum
)-Viruses
Rose (
Rosa
spp.) and hybrids-Armillaria Root Rot
Rose (
Rosa
spp.) and hybrids-Bacterial Cane Blight
Rose (
Rosa
spp.) and hybrids-Bacterial Leaf Spot and Blast
Rose (
Rosa
spp.) and hybrids-Black Mold
Rose (
Rosa
spp.) and hybrids-Black Spot
Rose (
Rosa
spp.) and hybrids-Botrytis Bud and Twig Blight
Rose (
Rosa
spp.) and hybrids-Brand and Common Canker
Rose (
Rosa
spp.) and hybrids-Bullhead
Rose (
Rosa
spp.) and hybrids-Chemical Injury
Rose (
Rosa
spp.) and hybrids-Crown Gall
Rose (
Rosa
spp.) and hybrids-Downy Mildew
Rose (
Rosa
spp.) and hybrids-Lime-induced Chlorosis
Rose (
Rosa
spp.) and hybrids-Nematodes
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