First Report of Citrus Greening Disease and Associated Bacterium "Candidatus Liberibacter asiaticus" from Bhutan.

During July 2002, surveys of mandarin orchards were conducted in Punakha Valley and Wangdue districts of Bhutan. Symptoms of the greening disease were observed in most of the orchard. The incidence of disease was recorded up to 30% in 24 private orchards with more than 5,000 trees total.

First Report of "Candidatus Liberibacter asiaticus", the Agent of Citrus Huanglongbing (Ex-greening) in Bhutan.

Mandarin (Citrus reticulata) is the most important cash crop in Bhutan and plantations total approximately 1.8 million trees (Ministry of Agriculture, Thimphu, Bhutan, 2000). Most trees are a local mandarin variety.