Unfortunately, pine tree fungal diseases are all too common, and some trees might suffer from more than one at a time. When the results of a tree’s lab test came in, host Kevin O’Connor, landscape contractor Lee Gilliam, and arborist Brandon Maltby met to discuss common diseases and treatments.
Needle Blight and Needle Cast
Our homeowner’s tree was suffering from two fungal diseases, including needle blight and needle cast. These are some of the most common diseases, and their treatments are similar. Brandon put the tree on a disease program to protect the new tree tissue as it develops. Brandon will apply a fungicide every two weeks in the spring and once in the fall, for the next two to three years.
Apple Scab
Apple scab is a common disease, affecting apples and crabapple trees. It’s a fungus that affects the leaves, fruit, and flowers, and can impact the tree’s ability to produce fruit. The best treatment in this case is prevention, by planting disease-resistant variants. However, if an existing tree is suffering, pruning the tree to allow more sunlight and airflow through will reduce the leaf wetness in the spring.
Apple Cedar Rust
Apple cedar rust is a common yet startling fungal disease. This fungus requires two types of trees (apple and cedar) to complete its lifecycle. It starts on the cedar tree in the springtime and spreads spores over the apple tree. The apple is then infected and sends spores back to the cedar tree. The best remedy is to remove one of the trees, but there may be treatment options, as well.
Beech Leaf Disease
Beech leaf disease is very common and severely threatens the beech population. It’s very new to the world of fungal diseases and there aren’t any cures yet. It’s caused by a microscopic worm (a nematode) that attacks the beech leaf buds. Anyone experiencing this issue should attempt to keep their tree healthy for as long as possible until arborists can develop a cure.
Resources
Arborist assistance provided by Maltby and Company
