 |
Potato mop-top virus causes an economically important disease of potato
since serious yield and quality reductions can occur in some cultivars. In potato the
virus can cause a wide range of symptoms including dwarfing of shoots (mop-top), pale
green V-shaped markings (chevrons) on young leaves, bright yellow blotches, mottling,
rings and V-shapes on foliage (aucuba), cracking of tubers and internal necrotic
rust-coloured spots, arches and rings within tubers (spraing). The powdery scab fungus (Spongospora
subterranea), a soil-borne organism, is the only known vector of potato mop-top
virus. |
