Diseases

Fungal diseases plague many different kinds of plants and their gardeners.  Fungal diseases tend to be persistent and can be difficult to manage.  Powdery mildew is one such disease.  It includes multiple fungal species and affects many different types of plants.  Powdery mildew…

 Why Winter is the Best Time to Prevent Fruit Tree Diseases.  In the Bay Area’s Mediterranean climate, our cool, wet winters and springs are perfect for many fungal and bacterial diseases of fruit trees. The good news: most of the effective control steps happen during the dormant season, long…

The black stuff on your leaves is likely sooty moldThe black stuff on your leaves is probably sooty mold, a fungal disease growing on plants and other surfaces, and it is often seen in the spring and summer. The leaves or stems have a black coating that looks like soot. If you look closely, it is growing…

Learn how to prevent and treat peach leaf curl with expert advice from the Master Gardeners of Alameda County. Keep your peach trees healthy and productive!

Learn about one of the major diseases associated with poor water management, oak root fungus (Armillaria root rot), and what you can do about it.

Learn about one of the major diseases associated with poor water management, Phytophthora root and crown rot.