Plant Diseases

Diagnose and treat common plant diseases, including fungal, bacterial, and viral problems. Keep your garden healthy with proven prevention techniques and care tips for vegetables, fruits, and flowers.

plant disease, onion rot in production field

White Rot on Garlic and Onions

What's that nasty stuff on my onions?

White cottony mycelium of Sclerotinia sclerotiorum on plant stem causing white mold disease.

White Mold on Plants: Identify, Prevent, and Treat Sclerotinia Fungus

What Is White Mold (Sclerotinia)?

powdery mildew plant disease on a yellow summer squash plant and leaves

How to Prevent and Control Powdery Mildew

Identify the Powdery Mildew Plant Disease

How to Identify and Prevent Blossom-End Rot

What To Do When You See Blossom-End Rot

How to Control Downy Mildew in the Garden

Prevent Downy Mildew This Summer!

How to Control Early Blight of Tomatoes and Potatoes

Identify and Control Early Blight

How to Control Fusarium Wilt in the Garden

Learn how to Identify and Treat Fusarium Wilt

Damping Off: The Seedling Killer and How to Stop It

What Causes Damping Off and How to Protect Your Seedlings from This Fungal Disease

virus disease on eggplant, yellow leaf mosaic

Mosaic Virus in Garden Plants: How to Identify, Prevent, and Control

Spotting and Stopping Mosaic Viruses Before They Take Over Your Garden

How to Prevent and Treat Gray Mold (Botrytis) in Your Garden

Simple tips to protect your plants from one of the most common garden fungi.

Bacterial burn on young apple tree branches in the garden. g

How to Identify and Manage Fire Blight

This disease needs action before it claims your apples, pears, and favorite shrubs.

Late Blight Disease of Tomatoes and Potatoes Plants

Identification, Prevention, and Treatment of Late Blight

How to Identify, Control, and Treat Anthracnose

Prevent This Fungal Disease in Your Garden

How to Identify and Control Rust Plant Disease

You Can Prevent Rust Plant Disease!