How long has hydrilla been a problem in Florida lakes?
Hydrilla was first discovered in 1960 in two Florida locations, a canal near Miami and in Crystal River. By the early 1970s it was established in major water bodies of all the drainage basins in Florida. In the 1980s over 20,000 hectares of water in Florida contained hydrilla and in the 1990s it had increased to over 40,000 hectares.
