A microscopic beetle is beginning to devastate native Southwest Florida trees, and the bug could eventually turn its sights on the avocado industry. The redbay ambrosia beetle is not quite 2 millimeters in length, but the tiny insect can take down 40-foot bay trees in a matter of weeks. The Asian beetle and laurel wilt disease were first documented in 2004 in Duval County in northeast Florida. Some experts think the beetle was brought to America on a shipment of tainted wood.