- The disease is caused by phytoplasmas, spread by leafhoppers.
- Symptoms include rolling inwards of young leaflets, with a distinctive pink – purple colouration in coloured flowered cultivars or chlorosis in white flowered cultivars.
- Tuber symptoms can result in “flecking” in fried potato products.
- There is little information of the extent of disease occurrence in the UK but the disease is prevalent in warmer climates, where weeds such as bindweed can be alternative, and overwintering, hosts.
- Samples of plants suspected to be infected should be sent to an appropriate laboratory for diagnostic analysis.
Potato purple roll top 2007 (Symptoms and transmission)