Roses are subject to several diseases. The most serious is rose rust(Phragmidium mucronatum), a species of rust fungus, which can defoliate the plant. More common, though less debilitating, are rose black spot, caused by the fungus Diplocarpon rosae, which makes circular black spots on the leaves in summer, and rose mildew, caused by Sphaerotheca pannosa. ; Bacterial Leaf Spots
- Pseudomonas syringae
Powdery Mildew
- Sphaerotheca pannosa var. rosae
Downy Mildews
Cankers
- Cane Blight Canker: Botryosphaeria dothoidea
- Graft Canker: Coniothyrium rosarum
- Brand Canker: Coniothyrium wernsdorffiae: black, sooty patches
- Brown Canker: Cryptosporella umbrina: cankers brown with a purple margin
- Cryptosporium minimum
- Crown Canker: Cylindrocladium scoparium
- Cytospora
- Diplodia
- Griphosphaeria corticola
- Common Stem Canker: Leptosphaeria coniothyrium: becoming cracked and sunken
- Nectria cinnabarina
Caterpillars
- Oblique Banded Leafroller: Choristoneura rosaceana
- Fall Webworm: Hyphantria cuneata
- European Corn Borer: Ostrinia nubilalis
- Rose Budworm: Pyrrhia umbra
fig. Rose budworm - Fall Cankerworm: Alsophila pometaria
- Green Fruitworm: Lithophane antennata
- Hag Moth: Phobetron pithecium
- Io Moth: Automeris io
- Oriental Fruit Moth: Grapholita molesta
- Saddleback Caterpillar: Sibine stimulea
- Speckled Green Fruitworm: Orthosia hibisci
- Spotted Cutworm: Xestia spp.
- Stinging Rose Caterpillar: Parasa indetermina
- Tobacco Budworm: Heliothis virescens
- Variegated Leafroller: Platynota flavedan:
- Western Tent Caterpillar: Malacosoma californica
Sawflies
- Bristly Rose Slug: Cladius isomerus
- Rose Slug: Endelomyia aethiops
- Curled Rose Sawfly: Allanthus cinctus
- Raspberry Horntail: Hartigia cressoni
- Rose Shoot Sawfly: Hartigia trimaculata
Crown Gall
- Agrobacterium tumeifasciens
Hairy Root
- Agrobacterium rhizogenes
Black Spot
- Diplocarpon rosae
- Rose Anthracnose
- Elsinoë rosarum
Black Mold
- Chalaropsis thievaloides
Leaf Spots
- Alternaria circinans
- Cercospora puderi
- Monochaetia compta
- Mycoshpaerella rosicola
- Septoria rosae
Blight
- Botrytis cinerea: Flowers, buds, and stems
Wilt
- Verticillium albo-atrum
Rusts
- Phragmidium americanum
- Phragmidium fusiformae (on wild roses)
- Phragmidium mucronatum (in dry climates)
fig. Rust in rose leaf - Phragmidium montivagum (on wild roses)
- Phragmidium rosae-arkansanae (on wild roses)
- Phragmidium rosae-californiacae (on wild roses)
- Phragmidium rosae-pimplinellifoliae
- Phragmidium rosicola (on wild roses)
- Phragmidium speciosum
Mosaic
- Rose Mosaic Virus
Streak
- Rose Streak Virus
Root Knot:
- Meliodgyne hapla
- Meliodgyne incognita
Root Lesion
- Pratylenchus vulnus
Stubby Root Trichodorus christiei
Leaf Curl: Transmitted through grafting
Chlorosis:Caused by iron deficiency
Dwarfing: Rose Spring Dwarf: transmitted through grafting (virus?)
Mercury damage: Caused by mercury vapor
Aphids
- Melon Aphid, Cotton Aphid: Aphis gossypii
- Potato Aphid: Macrosiphum euphorbiae
- Rose Aphid: Macrosiphium rosae
- Aphid: Myzaphis rosarum
- Green Peach Aphid: Myzus persicae
- Rose Grass Aphid: Metolophium dirhodum
Scales
- California Red Scale: Aonidiella aurantii
- Rose Scale: Aulacaspis rosae
- Florida Red Scale: Chrysomphalus aonidum
- Greedy Scale: Hemiberlesia rapax
- European Fruit Lecanium Scale: Lecanium corni
- Oystershell Scale: Lepidosaphes ulmi
- Walnut Scale: Quadraspidiotus juglansregiae
- San Jose Scale: Quadraspidiotus perniciosus
- Black Scale: Saissetia oleae
- Camphor Scale: Pseudaonidia duplex
- Cottony Maple Scale: Pulvinaria innumerabilis
- Latania Scale: Hemiberlesia lataniae
- Olive Scale: Parlatoria oleae
Hoppers
- Rose Leafhopper: Edwardsiana rosae
Bugs
- Fourlined Plant Bug: Poecilocapsus lineatus
- Campylomma Bug: Campylomma verbasci
Earwigs
- European Earwig: Forficula auricularia
Thrips
- Western Flower Thrips: Frankliniella occidentalis
- Flower Thrips: Frankliniella tritici
- Tobacco Thrips: Frankliniella fusca
- Greenhouse Thrips: Heliothrips haemorrhoidalis
- Onion Thrips: Thrips tabaci
Flies
- Rose Midge: Dasineura rhodophaga
Beetles
- Rose Stem Girdler: Agrilus aurichalceus
- Rose Chafer: Macrodactylus subspinosus
- Asiatic Garden Beetle: Maladera castanea
- Raspberry Cane Borer: Oberea maculata
- Japanese Beetle: Popillia japonica
- Rose Curculio: Rhynchites bicolor
- Hoplia Beetle: Hoplia callipyge
- Oriental Beetle: Exomala orientalis
- Tenlined June Beetle: Polyphylla decimlineata
Weevils
- Japanese Weevil: Callirhopalus bifasciatus
Wasps
- Mossy Rose Gall Wasp: Diplopepis rosae
Mites
- Two Spotted Mite: Tetranychus urticae
- European Red Mite: Panonychus ulmi
Slugs and Snails
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