What is Oak Wilt?
Oak Wilt, one of the most destructive tree diseases in the United States, is killing Oak Trees in central Texas at epidemic proportions. Oak wilt is an infectious disease caused by the fungus Bretziella fagacearum, which invades and disables the water-conducting system (xylem) in oaks. All oaks can be infected by the fungus that causes oak wilt; however, some species are affected more than others. The successful management of oak wilt depends on correct diagnosis and an understanding of how the pathogen and different oak species interact.
How Does a Tree Get Oak Wilt?
There are a few ways we the disease spreads, but things like woodpeckers, squirrels, and other unknowns can and will infect new Trees. This is why trenching rarely works.
Root Connections
The root systems of some Oaks fuse together underground and share resources like Nutrients, and water, Unfortunately, they also share pathogens like Oak Wilt. It can move underground from one neighbor to the next.
Nitidulid Beetle
There is a Beetle in flight from February to July 4. The Nitidulid Beetle. When you make any cuts on an Oak Tree, the tree will pitch out, so to keep the beetle away, it's recommended that you spray the cut with a paint. Only Oaks, and only during the flight season.
Misc. Carriers
There are a host of other vectors, for example a woodpecker could carry it. A tree pruning company can spread it They may remove infected trees, and must clean and disinfect their saws before moving to the next property. A single saw is all it takes.
What to Look For in Your Trees
Look for Veinal Necrosis, its the easiest to recognize. Do not look in the Trees, always look on the ground, it's much easier to find. Once you see one, you will recognize them quickly
If it's easier, you can just call us and we will help you diagnose the Trees
Veinal Necrosis in the Tree
This is the sign of Oak Wilt in Live Oaks.
It is difficult to spot in the tree itself.
Veinal Necrosis Leaf Mix
This is how they look mixed in, I have them circled so you can see what the natural environment will look like.
Leaves Singled Out
This will give you an idea of what they look like when they are all alone.