Cedar apple rust is an appropriate name for a disease caused by a fungus that attacks both the cedar and the apple. It is also fitting since the reddish galls produced on the cedar are called cedar apples! This disease is caused by Gymnosporangium juniperi-virginianae. Two similar diseases, Hawthorn rust and quince rust, are caused by closely related fungi, Gymnosporangium globosum and Gymnosporangium clavipes, respectively. These three fungi and related species are heteroecious and demicyclic, a form of macrocyclic species in which no uredial stages occur. No uredial stages occur in most species of Gymnosporangium.
KeywordsSide View Causal Organism Rust Fungus Apple Orchard Spore Form
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