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    • Types of Roses
    • Easy Roses
    • Climbing Roses
    • Portland's Rose Test Garden
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    • Pruning Roses
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    • Rose Bloom Balling
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Peony Measles
Cladosporium paeoniae

Amanda's Garden Consulting

Peony Measles

Graphiopsis chlorocephala, Cladosporium paeoniae,peony measles,peony diseases,peony blotch,The Garden Website,Amanda’s Garden Consulting,Amanda Jarrett
Graphiopsis chlorocephala, Cladosporium paeoniae,peony measles,peony diseases,peony blotch,The Garden Website,Amanda’s Garden Consulting,Amanda Jarrett
Graphiopsis chlorocephala, Cladosporium paeoniae,peony measles,peony diseases,peony blotch,The Garden Website,Amanda’s Garden Consulting,Amanda Jarrett
Graphiopsis chlorocephala, Cladosporium paeoniae,peony measles,peony diseases,peony blotch,The Garden Website,Amanda’s Garden Consulting,Amanda Jarrett
This fungal disease caused by Graphiopsis chlorocephala (previously named Cladosporium paeoniae) is commonly known peony blotch, peony measles, red spot and leaf blotch disease.
Symptoms first appear as reddish, brown to purplish dots on the topside of the foliage with brown spots on the underside. Stems are often streaked with purple or red. The spots first appear early in the season when flower buds appear and progresses over the season. Eventually the spots merge together and appear on buds, pets and seed heads. Although this disease is unsightly, it’s not a killer. Dwarf and red peonies are more prone to this common disease, however there are cultivars there are resistant cultivars available.

Control: Remove infected foliage as soon as they appear, but disinfect your pruners after each leaf is clipped off to reduce spreading the disease even more. Discard the infected growth and do not compost them.
​
Prevention: Since this disease overwinters, remove all foliage from all your peonies and discard them. Make sure you disinfect your pruners between each peony. Thoroughly clean up all debris beneath and around the plants. Avoid overhead watering and keep foliage dry so apply water the base of the plant, not the top. Avoid crowding peonies as lack of air circulation also contributes to this disease. You can use a sulphur of copper fungicide to help control this peony measles, but correct maintenance is essential.

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  • Home
  • About, Services, Contact
  • Amanda's Garden Blog
  • Ask Amanda
  • Roses
    • Types of Roses
    • Easy Roses
    • Climbing Roses
    • Portland's Rose Test Garden
    • Rose Insects & Diseases
    • Pruning Roses
    • Rose Sawfly
    • Rose Bloom Balling
  • Pruning
    • Pruning Tools
    • Winter Pruning
    • Pruning Grapes
    • Pruning Clematis
    • Prune Your Own Garden Registration
  • Lawn Basics
    • Seeding & Sodding Lawns
    • Lawn Maintenance Schedule
    • Spring Lawn Care
    • Moss in Lawns
    • Lawn Grub Control
  • Mulching
    • Living Mulches - Groundcovers
  • Propagation
    • Growing Seeds Outdoors
    • Growing Seeds Indoors
    • Taking Cuttings
    • Saving Tomato Seeds
    • Seed & Plant Catalogues
  • How to Garden Topics
    • Planting Know-How
    • Soil Building
    • Drought Gardening
    • Sheet Mulching, Lasagna Gardening
    • Cover Crops
    • Composting
    • Compost Tea
    • Planting Spring Flowering Bulbs
    • Houseplant Winter Care
  • Growing Food
    • Taming Tomatoes
    • Speeding up Tomato Harvest
    • Tomato Tips
    • Tomato Troubles
    • Crop Rotation, Succession & Companion Planting
    • Growing Potatoes
    • Harvesting
    • Winter Veggie Gardening
  • Plant Pests 1
    • Plant Pests Part 2 - Controlling Insects
    • Viburnum Leaf Beetle
    • Dormant Oil/Lime Sulfur
    • Japanese Beetles
    • Peony Blotch/Measles
    • Slugs & Snails
    • Horsetail, the Weed
    • June Beetle
    • Powdery Mildew
    • Soil Solarization
    • Rhododendron Leaf Spot
    • Plant Rusts
  • Container Growing
    • Choosing a Container
  • Monthly Flower Arrangements
  • Feeding Plants 101
    • Fertilizers & Ratios
    • Nutritional Deficiencies & Toxicities
    • Organic Plant Food
  • Plant of the Month
    • Colourful Fall Plants
    • Aubretia, Rock Cress
    • Astilbes
    • Aucuba, Japanese Spotted Laurel
    • Autumn Crocus
    • Beautyberry, Callicarpa
    • Black-eyed Susans
    • Bleeding Heart, Lamprocapnos spectabilis
    • Dahlias
    • Devil's Walking Stick, Aralia spinosa
    • Dwarf Burning Bush
    • Fall Asters
    • Flowering Currants
    • Flowering Quince
    • Garden Phlox
    • Heathers
    • Hellebores, Lenten roses
    • Himalayan Sweet Box
    • Jack-in-the-pulpit, cobra lily
    • Laurustinus viburnum, Viburnum tinus
    • Lavenders
    • Lily-of-the-Valley Shrub, Pieris japonica
    • Mediterranean Spurge
    • Montana Clematis
    • Mountain Ash
    • Oriental Poppies
    • Paperbark Maple
    • Pink Dawn Bodnant Viburnum
    • Poinsettia
    • Ornamental Kale
    • Peruvian Lily, Alstroemeria
    • Persian Silk Tree
    • Japanese Anemones
    • Japanese Forest Grass
    • Japanese Maples
    • Japanese Skimmia
    • Rose of Sharon
    • Sasanqua, Winter Camellia
    • Strawberry Tree, Pacific Madrone
    • Stewartia
    • Torch Lily, Kniphofia uvaria
    • Tree Peonies
    • Tuberous Begonias
    • Virginia Creeper
    • Weigela
    • Winterhazel, Corylopsis
    • Wintergreen, Gaultheria procumbens
    • Witch Hazel
  • Website Index