Asian cycad scale is native to Thailand and southern China and was imported to Florida on nursery stock. The scale has now spread wherever cycads are grown in the U.S. and elsewhere. The scale has infested native cycads throughout the forests of Guam, many of which are over 100 years old. Mortality of 100% of cycads can be expected within one year following infestation. In a Los Angeles trial, scale populations were reduced in Imicide-injected cycads by 32% after 60 days while scale populations increased by 268% in untreated control cycads.
