What is Oak Wilt?
Oak wilt is caused by a fungus called Bretziella fagacearum. It is a deadly tree disease, killing millions of central Texas oak trees every year.
Trees get water and nutrients from their roots. They transmit nutrients through “veins” in the trunk, up to the branches and leaves. Oak wilt clogs the veins of the tree, so it can’t deliver food and water to the rest of the tree. Infected trees start to die from the top down, because it’s hardest to get the liquid to the top of the tree.
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