Final diagnosis


Stolbur and other phytoplasmas

Purplish leaf in-rolling, with aerial tubers caused by <b>stolbur</b> (<i><b>Stolbur Phytoplasma</i></b>).
Threadlike and hairy sprouts on the left-hand tuber infected by <b>stolbur phytoplasma</b>, sprouts on healthy tuber on the right-hand.