Final diagnosis


Corky collar disease

The collar of the plants is severely affected, particularly suberized and bursts are important. Tissues having lost their elasticity make the base of the stem more brittle. <b>Corky collar</b>
The collar has a corky cortex and some bursts. <b>Corky collar</b>
A longitudinal section shows that the cortex has a thick and suberized surface and tissues turn brown in depth at bursts level. <b>Corky collar</b>