Cadang-cadang is a disease caused by Coconut cadang-cadang viroid (CCCVd), a lethal viroid of Coconut (Cocos nucifera), Buri (Corypha utan), and African Oil Palm (Elaeis guineensis). Every year one million coconut palms are killed by CCCVd and over 30 million coconut palms have been killed since Cadang-cadang has been discovered. CCCVd directly affects the production of copra, a raw material for coconut oil and animal feed. CCCVd is the smallest known pathogen and it is biologically distinct from other viroids; it consists of circular or lineal single-stranded RNA with a basic size of 246 or 247, it is thought it can be transmitted by seed or pollen (with low transmission rates) and occur in almost all plant parts. Once infected, coconut palm shows yellow leaf spots and nut production ceases. The viroid is mechanically transmissible via nucleic acid inocula, however the mode of natural transmission is not known. The viroid is only detected in Palmae. The mode of natural transmission is unknown and eradication measures fail to control the disease.