Garden

 Armillaria root rot, also known as Oak root fungus, is a disease of many different plants.  There is no known effective cure.  Root rot fungus disease of trees and woody plants. Affects palms, succulents, ferns and other herbaceous plants like begonia, daffodil, dahlia, and geranium.  No…

Seedlings sometimes fail to sprout or die soon after. Seeds may rot before germinating, shoots may decay before they emerge, or stems of seedlings may be attacked near the soil line, causing young plants to collapse. These diseases are collectively called “damping off,” likely caused by a number of soil…

Downy mildews, including Peronospora and Plasmopara spp., are pathogenic water molds (oomycetes) that primarily damage foliage. Hosts include cane berries, roses, various herbaceous ornamentals, and many fruit, grain, and vegetable crops. CategoryFungiSigns/SymptomsDowny mildew causes pale green to…

 Fire blight is a common and frequently destructive disease of pome fruit trees and related plants.  The disease can destroy limbs and even entire shrubs or trees. Caused by the bacterium Erwinia amylovora. Pear (Pyrus species) and quince (Cydonia) are extremely susceptible.  Apple, crabapple …

Fungus that only infects tomatoes. Like verticillium, causes leaf yellowing and discoloration of water-conducting tissues. Fungi spread in soil water, on equipment, transplants, or tubers. Once inside the root, the fungus grows until it reaches the water-conducting cells, inside which it spreads upward…

 Fungal disease that affects the blossoms, fruit, leaves, and shoots of peaches, ornamental flowering peaches, and nectarines. One of the most common disease problems for backyard gardeners growing these trees. When severe, the disease can reduce fruit production substantially. The loss of leaves and…

 Powdery mildew is a common disease on many types of plants and is prevalent in many areas of California. Infection occurs when fungus contacts a suitable host and environmental conditions are favorable. Infections spread as spores produced in these white patches move by wind and splashing rain to other…

Grows on plants and other surfaces covered with honeydew, a sticky substance created by some certain insects. Doesn’t infect plants, but the mold can indirectly do damage by coating leaves to the point that sunlight can’t reach the leaf surface. Without adequate sunlight, the plant cannot effectively…

Verticillium Wilt, one of the most widespread and destructive soil-borne diseases of plants, attacks many woody and herbaceous species throughout the world. The causal fungus, verticillium dahliae, infects susceptible plants through the roots and invades and plugs the water conducting tissues. Verticlllium…