Occurrence of rust disease Caused by Gymnosporangium pleoporum on Cotoneaster acutifolius in China.

Species of Gymnosporangium are major pathogenic rust fungi causing diseases and significant economic losses of plants in the Cupressaceae and Rosaceae family (Kern 1973). During our investigation of rust fungi in Qinghai Province, northwestern China, we found the spermogonial and aecial stages of Gymnosporangium species on Cotoneaster acutifolius. C.

Powdery Mildew Caused by Erysiphe sedi on Crassula capitella in China.

Crassula capitella Thunb. is a succulent used ornamentally in gardens and landscapes. In August 2019, severe powdery mildew infection was observed on C.