What is the Primary source of inoculum of cedar apple rust?

Explanation: the Primary source of inoculum of cedar-apple rust is Telial galls on cedar plant. The causal organism is Gymnosporangium juniperivirginianae. Spores produced on eastern red cedar are discharged following rains and disseminated by wind currents to apple hosts. Spores produced on apple may also be carried by wind to cedars