Laurel wilt is spread by a tiny beetle called the redbay ambrosia beetle (_Xyleborus glabratus_). The beetles bore into the bark of laurel trees and lay their eggs. The fungus that causes laurel wilt grows on the surface of the beetles' bodies, and is spread to new trees when the beetles bore into them.
Laurel wilt is a serious threat to avocado trees because the fungus can cause them to wilt and die within a few weeks. There is no cure for laurel wilt, and the only way to prevent it is to prevent the redbay ambrosia beetle from spreading the fungus. This can be done by:
- Removing laurel trees that are infected with laurel wilt
- Pruning branches from infected trees
- Applying insecticides to trees to prevent the beetles from boring into them
- Using traps to catch beetles
Laurel wilt is a devastating disease, but it is one that can be managed. By taking these steps, we can help to protect avocado trees from this destructive fungus.