Widespread distribution. Asia, Southeast Asia, Oceania. Ghost spot has probably the widest distribution, and is likely to be present wherever the crop is grown. On taro. Minor diseases.
Ghost leaf spot (Cladosporium),orange leaf spot (Neojohnstonia),white leaf spot (Pseudocercospora) and shot-hole (Phoma). On older leaves.
Ghost – reddish-brown with light brown centres, not all penetrating to the undersurface; orange – yellow-brown, sometimes with yellow border; white – whitish-green, dark centres below, leaving white margin; shot-hole – brown up to 20 mm (larger than others), centres fall out leaving hole with yellow halo. All are spread in wind and rain.
Cultural control: none recommended, as the spots are unlikely to affect yields.