Laurel Wilt Disease: What Florida Homeowners Need to Know in Pensacola

Laurel wilt disease has become a significant concern for Florida homeowners and tree care professionals throughout the Gulf Coast region. This deadly fungal disease affects trees in the laurel family, including redbay and avocado trees commonly found in Pensacola yards. The disease spreads rapidly through the redbay ambrosia beetle and can kill mature trees in a matter of weeks. Understanding laurel wilt helps Pensacola homeowners recognize the disease and take appropriate action to protect their trees.

What Is Laurel Wilt Disease and How Does It Spread?

Laurel wilt disease is a fatal vascular disease caused by the fungus Raffaelea lauricola, which is introduced into trees by the redbay ambrosia beetle. The disease affects trees in the laurel family, including redbay, avocado, sassafras, and camphor trees. The beetle carries the fungus on its body and introduces it into trees when it tunnels into the wood. Once introduced, the fungus spreads through the tree's vascular system, blocking water and nutrient flow. The disease can kill affected trees within weeks to months of infection. According to the University of Florida IFAS Extension, laurel wilt has killed millions of redbay trees in Florida and continues to spread throughout the southeastern United States.

What Are the Signs of Laurel Wilt in Trees?

Recognizing the signs of laurel wilt helps homeowners identify the disease early when management options are still available. Wilting leaves that turn brown and remain attached to the tree are the most characteristic sign of laurel wilt. Leaf discoloration begins on individual branches and progresses throughout the canopy as the disease spreads. Black or brown staining in the wood, visible when the bark is removed, indicates the presence of the fungus. Small entry holes in the bark with fine sawdust indicate redbay ambrosia beetle activity. Affected trees may produce visible gum or resin at beetle entry points. According to the University of Florida IFAS Extension, laurel wilt symptoms progress rapidly, often killing affected trees within weeks.

Which Trees in Pensacola Are Affected by Laurel Wilt?

Several tree species common to Pensacola and the Gulf Coast region are susceptible to laurel wilt. Redbay trees are highly susceptible and have been devastated by laurel wilt throughout Florida. Avocado trees, which are grown by many Pensacola homeowners, are also susceptible to laurel wilt and can be killed by the disease. Sassafras and camphor trees, both found in the region, are also affected. Other members of the laurel family, including pondberry and swampbay, are also vulnerable. According to the University of Florida IFAS Extension, the disease continues to spread to new areas as the redbay ambrosia beetle expands its range.

Can Laurel Wilt Be Treated or Prevented?

Managing laurel wilt involves prevention, early detection, and removal of infected trees to prevent spread. No cure is available once a tree is infected, making early detection and removal the most effective management strategy. Systemic fungicides may have some efficacy for protecting high-value avocado trees, but are not a practical solution for landscape trees. Preventing spread includes removing infected trees promptly and avoiding movement of firewood or wood products from infected trees. Monitoring trees for symptoms helps identify infections early when removal can prevent spread. The University of Florida IFAS Extension recommends removing infected trees and disposing of wood properly to limit disease spread.

When Should You Remove a Tree With Laurel Wilt?

Prompt removal of trees affected by laurel wilt is essential for protecting other trees on your property and in the surrounding area. Removal should occur as soon as the disease is confirmed to prevent the redbay ambrosia beetle from spreading the fungus to neighboring trees. The tree should be removed in a way that minimizes disturbance and beetle spread, with wood disposed of appropriately. Stump removal is recommended to eliminate beetle breeding sites and prevent further spread. The affected tree should not be used for firewood or mulch, as the disease can spread to new locations through wood movement. According to the University of Florida IFAS Extension, proper disposal of infected wood is essential for disease management.

Frequently Asked Questions

Sources

• University of Florida IFAS Extension - https://edis.ifas.ufl.edu
• USDA Forest Service - https://www.fs.usda.gov
• Florida Department of Agriculture and Consumer Services - https://www.fdacs.gov