Bulbs
Flower Basics
Flower Beds & Specialty Gardens
Flower Garden
Garden Furniture
Garden Gnomes
Garden Seeds
Garden Sheds
Garden Statues
Garden Tools & Supplies
Gardening Basics
Green & Organic
Groundcovers & Vines
Growing Annuals
Growing Basil
Growing Beans
Growing Berries
Growing Blueberries
Growing Cactus
Growing Corn
Growing Cotton
Growing Edibles
Growing Flowers
Growing Garlic
Growing Grapes
Growing Grass
Growing Herbs
Growing Jasmine
Growing Mint
Growing Mushrooms
Orchids
Growing Peanuts
Growing Perennials
Growing Plants
Growing Rosemary
Growing Roses
Growing Strawberries
Growing Sunflowers
Growing Thyme
Growing Tomatoes
Growing Tulips
Growing Vegetables
Herb Basics
Herb Garden
Indoor Growing
Landscaping Basics
Landscaping Patios
Landscaping Plants
Landscaping Shrubs
Landscaping Trees
Landscaping Walks & Pathways
Lawn Basics
Lawn Maintenance
Lawn Mowers
Lawn Ornaments
Lawn Planting
Lawn Tools
Outdoor Growing
Overall Landscape Planning
Pests, Weeds & Problems
Plant Basics
Rock Garden
Rose Garden
Shrubs
Soil
Specialty Gardens
Trees
Vegetable Garden
Yard Maintenance
Black Spots on Live Oak Leaves
Black Spots on Live Oak Leaves. Live oak leaves should be flat, dark green and healthy. This allows the oak tree to photosynthesize and turn sunlight into energy for processing nutrients and moving water throughout the structure of the branches, trunk and roots. Black spots on the leaves indicate a serious health problem that affects the overall...
Live oak leaves should be flat, dark green and healthy. This allows the oak tree to photosynthesize and turn sunlight into energy for processing nutrients and moving water throughout the structure of the branches, trunk and roots. Black spots on the leaves indicate a serious health problem that affects the overall health and growth of the oak tree.
Anthracnose of Oak Trees
Anthracnose is a serious fungal disease that has the potential to affect live oaks; serious infections may kill the tree. One of the symptoms of an anthracnose infection is black spots on the oak tree. Other symptoms that indicate anthracnose in an oak tree include leaf blotches, dead portions of the leaves between the veins and premature leaf drop. Anthracnose is treated by gathering and removing fallen leaves and branches from around the oak, applying fungicide to the oak tree and pruning severely affected branches.
Sooty Mold of Oak Trees
Sooty mold is a fungal disease spread to oak trees by aphids and scale insects; it causes black spots to appear on the live leaves. Over time, the black spots will spread to cover the entire leaf as the disease progresses and releases more spores into the surrounding atmosphere. Sooty mold is controlled through pruning affected areas and spraying the oak tree with a fungicide, as well as pesticides to control the aphids and scale insects on the tree.
Fungal Leaf Spot Disease of Oak Trees
Phyllosticta fraxinicola is the most common type of fungal leaf spot disease, according to the Oklahoma State University Cooperative Extension Service website. This disease causes large yellow or brownish spots to form on the underside of oak leaves; the spots later develop brown or black centers as the fungus matures and begins to release spores. Remove fallen leaves from around the oak tree and prune branches that have suffered from dieback. Apply a fungicide to the oak tree to kill the remaining spores.
Prevention and Care for Oak Trees
Begin a spray schedule of fungicides in the early spring to prevent fungal spores from infecting the tree. Remove fallen leaves and branches from around the tree throughout the year to keep them from becoming hosts to fungal diseases and the pests that spread them. Taking proper care of the oak tree throughout the spring and summer reduces the likelihood of pest attacks and fungal infections that cause black spots.
