X-disease symptoms in peaches, plums, apricots and nectarines are typically yellowed, curled leaves and shot hole as well as small deformed fruit.

Later in the season, limbs will often appear bare from the loss of affected leaves.
 
Leaf yellowing symptoms on infected peaches and nectarines begin to appear about 2 months prior to harvest, and get progressively worse, with shotholes appearing as the season progresses.

Types of Symptoms

Shot hole and leaf curling
X-disease phytoplasma in peach

 

Leaf yellowing and shot hole
X-disease phytoplasma in Country Sweet peach

 

Reduced fruit size
X-disease phytoplasma in Country Sweet peach

 

Yellowing and shot hole
X-disease phytoplasma in Honeyhaven nectarine

 

Yellowing and shot hole
X-disease phytoplasma in Honeyhaven nectarine

 

Reduced fruit size, bare limbs and shot hole
X-disease phytoplasma in Rich Lady nectarine

 

Bare Limbs and yellowing
X-disease phytoplasma in nectarine

 

Bare Limbs, curling and yellowing
X-disease phytoplasma in Country Sweet peach