First Report of ' Phytoplasma ziziphi'-Related Strains Infecting Peony ( Andr.) Showing Leaf Yellows Symptoms in China.

Peony ( Andr.), belonging to family Paeoniaceae, is an important medicinal and ornamental plant. During August of each year from 2016 to 2023, peony plants at Heze city were found to exhibit leaf yellows symptoms.