Plant Diseases

Almost every garden is eventually plagued by diseases, such as blight or root rot. We'll help you identify what's hurting your plants and how to treat them.
Channels created by larvae of the Emerald Ash Borer
8 Common Ash Tree Problems That Could Be Harming Your Tree
Leaves of a tomato plant turning purple and black
Why Are My Tomato Leaves Turning Purple?
Gooseberry sawfly larvae feeding on red currant leaf
How to Identify and Control Sawfly Larvae
rose rosette disease
How to Identify and Prevent Rose Rosette Disease
apple tree with unhealthy leaves
4 Common Apple Tree Diseases
Black currant disease. Anthracnose on the leaf
How to Identify, Treat, and Prevent Anthracnose
spraying baking soda spray onto a plant
How to Control Powdery Mildew With a Homemade Spray
spraying powdery mildew
How Do You Prevent and Control Powdery Mildew?
Red tomatoes hanging on diseased vine closeup
What Are Some Common Diseases That Can Kill Tomato Plants
Septoria on tomato plants
Save Your Tomatoes From Septoria Leaf Spot
powdery mildew on a plant leaf
How to Use Milk Spray to Control Powdery Mildew
powdery mildew on leaves
Prevent Powdery Plant Mildew Using Baking Soda and Soap
powdery mildew on plant
How to Defeat Powdery Mildew Taking Over Your Plants
Black Spot on Rose Leaves
How to Treat and Prevent Black Spots on Roses
brown patch disease on lawn
How to Get Rid of Brown Patch Disease on Grass
Lawn disease
How to Identify 5 Common Lawn Diseases
Red thread grass
Learn How to Identify and Treat Red Thread on Your Lawn
Magnolia sieboldii tree with white flowers.
This Is What to Do If You Have Black Spots on Magnolia Tree Leaves
Dutch elm disease on a tree trunk
Dutch Elm Disease and American Elm Trees
Basil downy mildew in sunlight
How to Deal With Basil Downy Mildew
Person pulling out weeds
Soil-Borne Diseases and How to Effectively Treat Them
Cucumbers wilting on the vine.
How to Solve Cucumber Problems With Bacterial Wilt
early blight on tomatoes
How to Identify and Control Early Blight on Tomatoes
Clematis plant with wilting leaves (clematis wilt), caused by fungus Phoma clematidina
What Plant Owners Need to Know About Clematis Wilt
Houseplant leaf sprayed with bottle to get rid of scale insects
Help for Hard-to-Control Scale Insects in Your Garden
Seedlings in a pot affected by damping off
Protecting Seedlings From Damping off Disease
Verticillium wilt
Verticillium Wilt Symptoms and Preventative Measures
A woman pruning flowers in garden
How to Prevent and Control Rust Fungus in Your Flower Garden
Tomato blight
What's Wrong With My Tomato Plant?
closeup of brown spots on leaves
What Causes Brown Spots on Tree Leaves?
Tomato plant infected tomato spotted wilt virus also known as TSWV
How to Identify, Treat, and Prevent Tomato Spotted Wilt
Aster yellow plant with yellow and green oval leaves on thick stems
How to Identify, Treat, and Prevent Aster Yellows
Spotting and cracking of apples caused by apple scab
How to Identify, Treat, and Prevent Apple Scab
Phytophthora blight (Phytophthora capsici) infecting green beans
How to Identify and Prevent Stem Rot
Corn smut (Ustilago maydis)
How to Identify, Treat, and Prevent Corn Smut
Curly top symptoms, infected plant in late season
How to Identify, Treat, and Prevent Curly Top
Oak tree infected with oak wilt the year before, with some new growth about 25 feet up the tree​
What’s Oak Wilt and How You Can Prevent It
Crown gall on a tree trunk caused by Agrobacterium tumefaciens
How to Identify, Treat, and Prevent Crown Gall
Patch of dead grass.
Learn How to Identify Snow Mold and What to Do About It
black knot
How to Identify, Treat, and Prevent Black Knot
orchid plant and neem oil
Learn How to Identify and Get Rid of Orchid Scale
Clubroot on rape seed (canola), showing a healthy root in the center
How to Identify, Treat, and Prevent Clubroot
Man gardening
How to Prevent Plant Diseases in Your Garden
Dead and diseased wood being pruned from magnolia tree
How to Prune Dead, Damaged and Diseased Wood
Fusarium wilt on leaves with green tomatoes hanging
Understanding and Controlling Fusarium Wilt in Tomatoes
Gray Mold (Botrytis) on a Tomato
How Do You Get Rid of Botrytis or Gray Mold on Tomatoes?
'Florific Sweet Orange' impatiens
9 Types of Mildew-Proof Impatiens
Tomato blight
Tomato Diseases: Is It Early Blight, Late Blight or Septoria Leaf Spot?
Geranium in pots against stone wall
Why Is There Grey Mold on My Flowers?
Yellow patch of grass
Turf Disease Identification, Pictures of Lawn Problems and More
Septoria lycopersici (Septoria Leaf Spot). Ascomycota. Common fungal leaf disease of tomatoes. Tomato leaf showing small brown spots characteristic of the disease and some chlorosis or yellowing. Franklin County. Ohio. USA
How to Diagnose Spotty Tomato Leaves
A red and green bradford pear tree
Learn How to Treat Fire Blight on Bradford Pear Trees
Powdery mildew on tree leaf.
Common Tree Fungus Identification and Treatment