Final diagnosis


Necrotic potato virus Y (responsible for PTNRD)

Necrotic spots due to a primary infection of the <b>Potato Virus Y<sup>NTN</sup></b> (PVY<sup>NTN</sup>) on potato leaves
Oak-leaf-shaped spots on potato leaves associated with a primary infection of the <b>Potato Virus Y<sup>NTN</sup></b> (PVY<sup>NTN</sup>)
Yellowing and necrotic rings observed on leaves of some potato varieties following <b>Potato Virus Y<sup>NTN</sup></b> (PVY<sup>NTN</sup>) infection
Brown blister caused by <i> <b> Potato Virus Y <sup> NTN </ sup> </i> </b> on potato tuber.
Brown blisters in the form of arcs, rings or lines, caused by <b>Potato Virus Y<sup>NTN</sup></b> (PVY<sup>NTN</sup>) on potato tuber
Typical symptoms of necrotic arcs and rings associated with primary <b>Potato Virus Y<sup>NTN</sup></b> (PVY<sup>NTN</sup>) infection on potato tuber
<b>On tubers : </b>typical symptoms of necrotic arcs and rings associated with <b> PVY<sup>NTN</sup></b> infection