Chirkey disease of cardamom is transmitted by

Chirkey disease of cardamom is transmitted by Corn aphids.
Chirke is caused by Large Cardamom Chirke Virus, a new virus species under the genus Macluravirus, family Potyviridae and is characterized by mosaic with pale streak on the leaves. The streaks turn pale brown resulting in drying, withering of leaves and finally death of the plants.
The chirke disease is transmitted by mechanical sap inoculation and also by aphid, Ropalosiphum maidis Fitch. The cultivar Kopringe is resistant to chirke.