First Report of Laurel Wilt Disease Caused by a Raffaelea sp. on Avocado in Florida

摘要: Laurel wilt is a vascular disease of redbay (Persea borbonia (L.) Spreng.) and other plants in the family Lauraceae southeastern United States. It caused by fungus (Raffaelea sp.) that vectored non-native insect Asian origin, ambrosia beetle (Xyleborus glabratus Eichhoff) (1). Since initial detection near Savannah, GA 2002, laurel has widespread mortality Georgia, South Carolina, Florida In September 2007, an avocado americana Mill.) tree planted approximately 10 years earlier residential neighborhood Jacksonville, FL was discovered to be infected with wilt. The crown various stages decline, including upper branches were dead leafless, those wilted drooping foliage, healthy foliage. Removal bark from branch sections revealed black-to-brown streaks discoloration sapwood few holes which di...