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HS1137: Laurel Wilt: A Threat to Redbay, Avocado and Related Trees in Urban and Rural Landscapes

Figure 5. Symptoms of laurel wilt in redbay trees: a) removing the bark reveals dark staining of the sapwood and b) the dark color of the outer ring of sapwood below the bark indicates the tree has been infested by the redbay ambrosia beetle and the wood colonized by the laurel wilt fungus. The fungus that has colonized the sapwood blocks water and nutrient movement in the tree.

Credit: Albert Mayfield, Florida Department of Agriculture and Consumer Services.