Abstract: Some warty patches slightly raised from the surface of the leaf sheath of some sugarcane plants in a sugarcane field at Sevanagala (60 36’ N, 800 87’ E), Sri Lanka, were observed during a field inspection in July 2016. These patches were irregular in shape and watery in appearance initially. Later, they become dry and reddish to dark red in colour. Microscopic examination on the damaged leaf sheaths showed large a population of minute mite. This study was conducted from July to September 2016 to identify this mite species and to investigate its damage symptoms and the occurrence in all sugarcane-growing areas in Sri Lanka.