Sandalwood Spike Disease

It is a disease of sandalwood tree caused by parasitic phyto-plasma.
The disease was first observed in the year 1899 in the sandalwood trees of Kodagu, Karnataka. Every year 1 to 5% of sandalwood trees are destroyed due to this disease.
The sandalwood tree was classified as 'Vulnerable' by the International Union for Conservation of Nature (IUCN) in 1998 as a result of the devastating effects of this disease.
At present there is no option available to control the spread of this disease other than cutting down infected trees.