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Insect and Plant Disease Diagnostic Lab - Plant Disease Images

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Agastache (Giant Hyssop)
– Rust Signs\Symptoms Pathogen
Alder
– Alder Leaf Curl Signs\Symptoms  
– Ascochyta Leaf Spot Signs\Symptoms Pathogen
– Sooty Mold Signs\Symptoms Pathogen
Alfalfa
– Leptosphaerulina Leaf Spot Signs\Symptoms Pathogen
Alyssum
– High EC, Low pH Signs\Symptoms  
Amaryllis
– Leaf Blotch Signs\Symptoms Pathogen
Amelanchier
– Anthracnose Signs\Symptoms Pathogen
– Gymnosporangium Signs\Symptoms  
– Powdery Mildew Signs\Symptoms Pathogen
Apple
– Apple Scab Signs\Symptoms Pathogen
– Cedar-Hawthorn Rust Signs\Symptoms Pathogen
– Crown Gall Signs\Symptoms  
– Flyspeck Signs\Symptoms  
– Japanese Apple Rust Signs\Symptoms Pathogen
– Nectria Canker Signs\Symptoms Pathogen
– Sooty Blotch Signs\Symptoms  
– Winter Injury Signs\Symptoms  
Arborvitae (Thuja)
– Arborvitae Leaf Miner Signs\Symptoms Insect
– Didymascella Leaf Blight Signs\Symptoms Pathogen
– Pestalotiopsis Blight Signs\Symptoms Pathogen
– Phyllosticta (associated with leaf blight) Signs\Symptoms Pathogen
Ash
– Anthracnose Signs\Symptoms Pathogen
– Ash Rust Signs\Symptoms Pathogen
– Flower Gall Signs\Symptoms
Astilbe
– Discosia Signs\Symptoms Pathogen
– Powdery Mildew Signs\Symptoms Pathogen
Azalea
– Leaf Gall Signs\Symptoms  
– Powdery Mildew Signs\Symptoms Pathogen
Bacopa
– Botrytis Canker Signs\Symptoms Pathogen
Basil
– Downy Mildew Signs\Symptoms Pathogen
Bay (Laurel)
– Anthracnose Signs\Symptoms Pathogen
Bean
– POTY Virus Signs\Symptoms  
– Uromyces Rust Signs\Symptoms Pathogen
– Fusarium Rot Signs\Symptoms Pathogen
Beech
– Sooty Mold Signs\Symptoms Pathogen
Birch
– Gloeosporium   Pathogen
– Marssonina Leaf Spot Signs\Symptoms Pathogen
– Powdery Mildew Signs\Symptoms Pathogen
– Septoria Signs\Symptoms Pathogen
Blueberry
– Colletotrichum Signs\Symptoms Pathogen
– Leaf Rust Signs\Symptoms Pathogen
– Phomopsis Canker and Tip Blight Signs\Symptoms Pathogen
– Witches’ Broom Signs\Symptoms  
Bouncing Bet
– Alternaria Leaf Spot Signs\Symptoms Pathogen
Boxwood
– Boxwood Leaf Miner Signs\Symptoms Insect
– Volutella Blight Signs\Symptoms Pathogen
Brambles
– Orange Rust Signs\Symptoms Pathogen
Buckthorn
– Crown Rust Signs\Symptoms Pathogen
Bugbane
– Ascochyta Leaf Spot Signs\Symptoms Pathogen
Cabbage
– Black Rot Signs\Symptoms Pathogen
Calendula
– Fusarium Wilt Signs\Symptoms Pathogen
Calibrachoa
– Black Root Rot Signs\Symptoms Pathogen
– Calibrachoa Mottle Virus Signs\Symptoms  
– Tobacco Mosaic Virus Signs\Symptoms  
Carrot
– Alternaria Leaf Blight Signs\Symptoms Pathogen
Celery
– Alternaria Blight Signs\Symptoms Pathogen
Chard
– Cercospora Leaf Spot Signs\Symptoms Pathogen
Cimicifuga
– Ascochyta Leaf Spot Signs\Symptoms Pathogen
Cissus
– Powdery Mildew Signs\Symptoms  
Clematis
– Leaf Spot Signs\Symptoms Pathogen
Coleus
– Downy Mildew Signs\Symptoms Pathogen
Corn
– Common Smut Signs\Symptoms Pathogen
– Alternaria Leaf Blight Signs\Symptoms Pathogen
Corylus
– Eastern Filbert Blight Signs\Symptoms Pathogen
Cosmos
– White Smut Signs\Symptoms Pathogen
Crucifers
– Club Root Signs\Symptoms  
Cucurbits
– Alternaria Leaf Spot Signs\Symptoms Pathogen
– Anthracnose Signs\Symptoms Pathogen
– Bacterial Wilt Signs\Symptoms  
– Belly Rot Signs\Symptoms Pathogen
– Black Rot Signs\Symptoms Pathogen
– Fusarium rot Signs\Symptoms  
– Gummy Stem Blight Signs\Symptoms Pathogen
– Phytophthora Fruit Rot Signs\Symptoms Pathogen
– Powdery Mildew Signs\Symptoms Pathogen
– Scab Signs\Symptoms Pathogen
– Septoria Leaf Spot Signs\Symptoms Pathogen
– Rodent Damage Response Signs\Symptoms  
– Unidentified Phytotoxicity Signs\Symptoms  
Daphne
– Tubercularia Signs\Symptoms Pathogen
Daylily
– Aureobasidium Signs\Symptoms Pathogen
– Leaf Streak Signs\Symptoms Pathogen
Delphinium
– Phoma Signs\Symptoms Pathogen
Dogwood
– Dogwood Anthracnose Signs\Symptoms Pathogen
– Golden Canker Signs\Symptoms Pathogen
– Powdery Mildew 1 Signs\Symptoms Pathogen
– Powdery Mildew 2 Signs\Symptoms Pathogen
– Septoria Leaf Spot Signs\Symptoms Pathogen
Douglas Fir
– Rhabdocline Needle Cast Signs\Symptoms  
– Swiss Needle Cast Signs\Symptoms Pathogen
Elder
– Leaf Spot Signs\Symptoms Pathogen
Elm
– Dutch Elm Disease Signs\Symptoms Pathogen
– Phomopsis (secondary?) Signs\Symptoms Pathogen
Euonymus
– Crown Gall Signs\Symptoms  
– Tubercularia Signs\Symptoms Pathogen
Fig
– Rust Signs\Symptoms Pathogen
Fir
– Broom Rust Signs\Symptoms Pathogen
– Cylindrocarpon Signs\Symptoms Pathogen
– Fir-Fern Rust Signs\Symptoms Pathogen
– Phyllosticta Needle Blight 1 Signs\Symptoms Pathogen
– Phyllosticta Needle Blight 2 Signs\Symptoms Pathogen
– Rhizosphaera Needle Cast Signs\Symptoms Pathogen
Fothergilla
– Botrytis Signs\Symptoms Pathogen
Fuchsia
– Insecticidal Soap Damage Signs\Symptoms  
Garlic
– Embellisia Bulb Canker Signs\Symptoms Pathogen
– Garlic Bloat Signs\Symptoms Pathogen
– Mushy Rot Signs\Symptoms Pathogen
– POTY Virus Positive Signs\Symptoms  
– Rust Signs\Symptoms Pathogen
– White Rot 1 Signs\Symptoms  
– White Rot 2 Signs\Symptoms  
Geranium
– Bacterial Wilt Signs\Symptoms  
– Botrytis Leaf Spot Signs\Symptoms Pathogen
– Oedema Signs\Symptoms  
– Pelargonium Flower Break Virus Signs\Symptoms  
– Pythium Root Rot Signs\Symptoms  
– Yellow Net Vein Virus Signs\Symptoms  
Gladiolus
– White Rot Signs\Symptoms  
Grape
– Black Rot Signs\Symptoms Pathogen
– Downy Mildew Signs\Symptoms Pathogen
Hawthorn
– Entomosporium Signs\Symptoms Pathogen
– Phomopsis Canker Signs\Symptoms  
Hazelnut
– Eastern Filbert Blight Signs\Symptoms Pathogen
Hemlock
– Hemlock Rust Signs\Symptoms Pathogen
– Hemlock Tip Blight Signs\Symptoms Pathogen
Heuchera
– Rust Signs\Symptoms Pathogen
Hickory
– Ascochyta Signs\Symptoms Pathogen
– Powdery Mildew Signs\Symptoms Pathogen
Holly
– Glyphosate Injury Signs\Symptoms  
Hollyhocks
– Rust Signs\Symptoms Pathogen
Honeysuckle
– Leaf Blight Signs\Symptoms Pathogen
– Powdery Mildew Signs\Symptoms Pathogen
Hops
– Downy Mildew Signs\Symptoms Pathogen
Horsechestnut
– Guignardia Blotch Signs\Symptoms Pathogen
Hosta
– Alternaria Leaf Spot Signs\Symptoms Pathogen
– Botrytis Leaf Spot Signs\Symptoms Pathogen
– Cercospora Signs\Symptoms Pathogen 
– Crown Rot Signs\Symptoms Pathogen 
– Hosta Virus X Signs\Symptoms  
Hydrangea
– Ascochyta Signs\Symptoms Pathogen
– Gray Mold Signs\Symptoms Pathogen
Impatiens, Garden
– Alternaria Leaf Spot Signs\Symptoms Pathogen
– Downy Mildew Signs\Symptoms Pathogen
Impatiens, New Guinea
– Myrothecium Leaf Spot Signs\Symptoms Pathogen
Ipomoea
– Oedema Signs\Symptoms  
Iris
– Leaf Spot Signs\Symptoms Pathogen
– Rhizome Rot Signs\Symptoms Pathogen
Jack-in-the-pulpit
– Rust Signs\Symptoms Pathogen
Jostaberry
– White Pine Blister Rust Signs\Symptoms Pathogen
Juniper
– Gymnosporangium Rust Signs\Symptoms Pathogen
– Kabatina Blight 1 Signs\Symptoms Pathogen
– Kabatina Blight 2 Signs\Symptoms Pathogen
– Leptosphaeria (secondary?) Signs\Symptoms Pathogen
– Mytilinidion (secondary) Signs\Symptoms Pathogen
– Oidiodendron (secondary) Signs\Symptoms Pathogen
– Ojibwaya perpulchra (secondary) Signs\Symptoms Pathogen
– Phomopsis Twig Blight Signs\Symptoms Pathogen
– Tip Blight Signs\Symptoms Pathogen
Kale
– Leptosphaerulina Leaf Blight Signs\Symptoms Pathogen
Lamium
– Downy Mildew Signs\Symptoms Pathogen
Lemon
– Anthracnose Signs\Symptoms Pathogen
Lettuce
– Downy Mildew Signs\Symptoms Pathogen
– Leaf Spot Signs\Symptoms Pathogen
Lilac
– Anthracnose Signs\Symptoms Pathogen
– Ascochyta Blight Signs\Symptoms Pathogen
– Leaf Spot Signs\Symptoms Pathogen
Lily
– Botrytis Blight Signs\Symptoms  
– Poor bulb storage Signs\Symptoms  
Mallow
– Rust Signs\Symptoms Pathogen
Maple
– Anthracnose 1 Signs\Symptoms Pathogen
– Anthracnose 2 Signs\Symptoms Pathogen
– Cristulariella Leaf Spot Signs\Symptoms Pathogen
– Leaf Blister Signs\Symptoms Pathogen
– Stegonsporium Canker Signs\Symptoms Pathogen
– Tar Spot Signs\Symptoms Pathogen
Mayapple
– Rust Signs\Symptoms Pathogen
Mountain Ash
– Entomosporium Leaf Spot Signs\Symptoms Pathogen
Mountain Laurel
– Phytophthora Leaf Spot Signs\Symptoms  
Myrtle
– Black Root Rot Signs\Symptoms Pathogen
– Rust Signs\Symptoms Pathogen
Ninebark
– Powdery Mildew 1 Signs\Symptoms Pathogen
– Powdery Mildew 2 Signs\Symptoms Pathogen
Oak
– Anthracnose Signs\Symptoms Pathogen
– Leaf Blister Signs\Symptoms Pathogen
– Tubakia Leaf Spot Signs\Symptoms Pathogen
– Botryosphaeria Canker Signs\Symptoms Pathogen
– Oak Leaf Gall Signs\Symptoms  
– Taphrina Signs\Symptoms Pathogen
Oat
– Crown Rust Signs\Symptoms Pathogen
Onion
– Purple Blotch Signs\Symptoms Pathogen
– Storage Rot Signs\Symptoms Pathogen
Orchid
– Dendrobium – Anthracnose Signs\Symptoms Pathogen
– Miltonia – Anthracnose Signs\Symptoms
– Oncidium – Anthracnose Signs\Symptoms
Pachysandra
– Volutella Blight Signs\Symptoms  
Pansy
– Black Root Rot Signs\Symptoms Pathogen
Parsley
– Septoria Leaf Spot Signs\Symptoms Pathogen
Pea
– Ascochyta Leaf and Pod Spot Signs\Symptoms Pathogen
– Black Root Rot Signs\Symptoms Pathogen
– Mycosphaerella Blight Signs\Symptoms Pathogen
– Powdery Mildew Signs\Symptoms Pathogen
Pear
– Fabraea Leaf Spot Signs\Symptoms Pathogen
– Pear Scab Signs\Symptoms Pathogen
Peony
– Anthracnose Signs\Symptoms Pathogen
– Botrytis Signs\Symptoms Pathogen
– Cercospora Leaf Spot Signs\Symptoms Pathogen
– Leaf Blotch Signs\Symptoms Pathogen
– Peony Ringspot Virus Signs\Symptoms  
Pepper
– Anthracnose Signs\Symptoms Pathogen
– Fruit Rot Signs\Symptoms Pathogen
– Fusarium Signs\Symptoms Pathogen
– Thrips Damage Signs\Symptoms Insect
– Oedema Signs\Symptoms  
Petunia
– Low pH; High Soluble Salt Signs\Symptoms  
Phlox
– Downy Mildew Signs\Symptoms Pathogen
– Powdery Mildew Signs\Symptoms Pathogen
– Septoria Leaf Spot Signs\Symptoms Pathogen
Pieris
– Pestalotiopsis Leaf Spot Signs\Symptoms Pathogen
Pine
– Bifusella Needle Blight Signs\Symptoms Pathogen
– Coleosporium Needle Rust Signs\Symptoms Pathogen
– Cyclaneusma Signs\Symptoms Pathogen
– Davisomycella Needle Blight Signs\Symptoms Pathogen
– Dothistroma Signs\Symptoms Pathogen
– Lophodermium Needle Blight Signs\Symptoms Pathogen
– Ploioderma Needle Cast Signs\Symptoms Pathogen
– Salt damage Signs\Symptoms  
– Sarea resinae (Secondary?) Signs\Symptoms Pathogen
– Sphaeropsis (Diplodia) Blight Signs\Symptoms Pathogen
– Stagonospora (Secondary?) Signs\Symptoms Pathogen
– Truncatella Needle Blight Signs\Symptoms Pathogen
– White Pine Blister Rust Signs\Symptoms Pathogen
Poppy
– Alternaria Leaf Spot Signs\Symptoms Pathogen
– Anthracnose Rot 1 Signs\Symptoms Pathogen
– Anthracnose Rot 2 Signs\Symptoms Pathogen
Potato
– Alternaria Leaf Spot Signs\Symptoms Pathogen
– Botrytis Signs\Symptoms Pathogen
– Chimeric Variegation Signs\Symptoms  
– Common Scab Signs\Symptoms  
– Fusarium Tuber Rot Signs\Symptoms Pathogen
– Growth Cracks Signs\Symptoms  
– Herbicide Damage Signs\Symptoms  
– Late Blight Signs\Symptoms Pathogen
– Potato Virus Y Signs\Symptoms  
– Unidentified Signs\Symptoms Pathogen
Privet
– Thedgonia Leafspot Signs\Symptoms Pathogen
Quince
– Rust Signs\Symptoms Pathogen
Raspberry
– Anthracnose Signs\Symptoms Pathogen
– Raspberry Cane Maggot Signs\Symptoms Insect
– Orange Rust Signs\Symptoms Pathogen
Rhododendron
– Gray Leaf Blight Signs\Symptoms Pathogen
Rose
– Black Spot Signs\Symptoms Pathogen
– Rose Midge Signs\Symptoms  
– Rust Signs\Symptoms Pathogen
Rosemary
– Botrytis Signs\Symptoms Pathogen
– Powdery Mildew Signs\Symptoms  
Rudbeckia
– Downy Mildew Signs\Symptoms Pathogen
– Septoria Signs\Symptoms  
Rye
– Ergot Signs\Symptoms  
Schlumbergera
– Oedema Signs\Symptoms  
Shepherd’s Purse
– Downy Mildew Signs\Symptoms Pathogen
Soybean
– Downy Mildew Signs\Symptoms Pathogen
Spinach
– Cladosporium Leaf Spot 1 Signs\Symptoms Pathogen
– Cladosporium Leaf Spot 2 Signs\Symptoms Pathogen
– Downy Mildew Signs\Symptoms Pathogen
Spruce
– Frost Injury Signs\Symptoms  
– Herbicide Injury Signs\Symptoms  
– Rhizosphaera Needle Cast Signs\Symptoms Pathogen
– Sirococcus Blight Signs\Symptoms Pathogen
– Spruce Needle Rust Signs\Symptoms Pathogen
– Stigmina infection Signs\Symptoms Pathogen
– Weir’s Cushion Rust Signs\Symptoms Pathogen
Stone Fruit (Prunus)
– Black Knot Signs\Symptoms  
– Blumeriella Leaf Spot Signs\Symptoms Pathogen
– Brown Rot Signs\Symptoms Pathogen
– Cherry Leaf Spot Signs\Symptoms Pathogen
– Peach Leaf Curl Signs\Symptoms Pathogen
– Peach Scab Signs\Symptoms Pathogen 
– Peach Botrytis Signs\Symptoms Pathogen
– Powdery Mildew Signs\Symptoms Pathogen
Strawberry
– Botrytis Rot Signs\Symptoms Pathogen
– Strawberry Leaf Spot Signs\Symptoms Pathogen
Sunflower
– Septoria Leaf Spot Signs\Symptoms Pathogen
Sweet Potato
– Oedema Signs\Symptoms
Sweetbay Magnolia
– Anthracnose Signs\Symptoms Pathogen
Tomato
Alice the Goon    
– Alternaria Stem Canker Signs\Symptoms Pathogen
– Anthracnose Signs\Symptoms  
– Blossom End Rot Signs\Symptoms  
– Chimeric Variegation Signs\Symptoms  
– Cristulariella Leaf Spot Signs\Symptoms Pathogen
– Early Blight Signs\Symptoms Pathogen
– Late Blight Signs\Symptoms Pathogen
– Leaf Mold Signs\Symptoms Pathogen
– Magnesium Deficiency Signs\Symptoms  
– Oedema Signs\Symptoms  
– Septoria Leaf Spot Signs\Symptoms Pathogen
– Stemphylium Leaf Spot Signs\Symptoms Pathogen
– Thrips Damage Signs\Symptoms Insect
– White Mold Signs\Symptoms  
Tulip
– Botrytis Bulb Rot Signs\Symptoms Pathogen
Turf
– Anthracnose Signs\Symptoms Pathogen
– Crown Rust Signs\Symptoms Pathogen
– Leptosphaerulina Signs\Symptoms Pathogen
– Red Thread Signs\Symptoms Pathogen
– Slime Mold Signs\Symptoms  
– Smut Signs\Symptoms Pathogen
Veronica
– Phoma Rot Signs\Symptoms Pathogen
Vinca
– Phoma Stem Rot Signs\Symptoms Pathogen
Violet
– Rust Signs\Symptoms Pathogen
Wheat
– Leaf Rust Signs\Symptoms Pathogen
– Loose Smut Signs\Symptoms Pathogen
– Powdery Mildew Signs\Symptoms Pathogen
– Tan Spot Signs\Symptoms Pathogen
Witchhazel
– Blight Signs\Symptoms Pathogen
– Gonatobotryum Signs\Symptoms Pathogen
– Seimatosporium Signs\Symptoms Pathogen
Wild Ginger
– Black Root Rot Signs\Symptoms Pathogen
Zinnia
– Alternaria Leaf Spot Signs\Symptoms Pathogen
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